Ceramics International最新文献_第2页

Defect engineering and charge separation in waste-driven ZnO/Al–SiO2 aerogel nanocomposites for superior photocatalytic activity 废物驱动ZnO/ Al-SiO2气凝胶纳米复合材料的缺陷工程和电荷分离研究

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.109

Mohammed Najmuldeen Hasan, Hamid Kazemi Hakki

This study presents the synthesis, structural tailoring, and photocatalytic evaluation of zinc oxide nanoparticles (ZnO NPs) immobilized within an aluminium-silica aerogel matrix derived from aluminium waste. Nanocomposites with varying aluminium-silica aerogel loadings were prepared and denoted as ASZ1, ASZ2, ASZ3, and ASZ4, corresponding to 10 %, 20 %, 30 %, and 40 % (wt), respectively, of Al–SiO₂ aerogel incorporated onto ZnO NPs. This approach addresses ZnO intrinsic photo-corrosion and the mechanical fragility of conventional silica aerogels, integrating a high-porosity, mechanically robust framework with an optically active semiconductor. The composites (ASZ1–ASZ4) were systematically characterized using XRD, FTIR, FESEM, BET-BJH analysis, UV–Vis spectroscopy, and (PL) spectroscopy to elucidate correlations between crystallinity, defect states, optical bandgap, and nanostructured morphology. BET analysis revealed a large surface area of approximately 769 m²/g for the aluminium -silica aerogel. As for the optimal formulation, ASZ3, exhibited the largest interplanar spacing (0.1845 nm), balanced lattice strain (0.004096), a red-shifted bandgap (2.82 eV), and the lowest PL emission intensity, indicative of suppressed electron-hole recombination. Morphological analysis confirmed uniform ZnO dispersion within a highly porous aerogel network with the smallest particle size of 25–40 nm for sample ASZ3, promoting efficient light harvesting and pollutant adsorption. The photocatalytic performance of the ASZ3 nanocomposite far surpassed that of pristine ZnO, achieving rapid and nearly complete MB degradation. These findings demonstrate the potential of aluminium-silica aerogel-supported ZnO as a scalable, eco-friendly platform for high-performance photocatalytic wastewater remediation.

本研究介绍了氧化锌纳米颗粒（ZnO NPs）的合成、结构裁剪和光催化评价，氧化锌纳米颗粒固定化在铝废物铝硅气凝胶基质中。制备了不同铝-二氧化硅气凝胶负载的纳米复合材料，分别表示为ASZ1， ASZ2， ASZ3和ASZ4，分别对应于10%，20%，30%和40% （wt）的Al-SiO2气凝胶掺入ZnO NPs。该方法解决了ZnO固有的光腐蚀和传统二氧化硅气凝胶的机械脆弱性，将高孔隙率，机械坚固的框架与光学活性半导体集成在一起。采用XRD、FTIR、FESEM、BET-BJH、紫外可见光谱和（PL）光谱对ASZ1-ASZ4复合材料进行了系统表征，以阐明结晶度、缺陷态、光学带隙和纳米结构形貌之间的关系。BET分析显示，铝-硅气凝胶的表面积约为769 m2/g。最佳配方ASZ3具有最大的面间距（0.1845 nm）、平衡的晶格应变（0.004096）、红移的带隙（2.82 eV）和最低的PL发射强度，表明抑制了电子-空穴复合。形貌分析证实，ASZ3样品在最小粒径为25-40 nm的高孔气凝胶网络中分散均匀，促进了高效的光收集和污染物吸附。ASZ3纳米复合材料的光催化性能远远超过了原始ZnO，实现了快速且几乎完全的MB降解。这些发现证明了铝-二氧化硅气凝胶负载ZnO作为一种可扩展的、环保的平台用于高性能光催化废水修复的潜力。

{"title":"Defect engineering and charge separation in waste-driven ZnO/Al–SiO2 aerogel nanocomposites for superior photocatalytic activity","authors":"Mohammed Najmuldeen Hasan, Hamid Kazemi Hakki","doi":"10.1016/j.ceramint.2025.12.109","DOIUrl":"10.1016/j.ceramint.2025.12.109","url":null,"abstract":"<div><div>This study presents the synthesis, structural tailoring, and photocatalytic evaluation of zinc oxide nanoparticles (ZnO NPs) immobilized within an aluminium-silica aerogel matrix derived from aluminium waste. Nanocomposites with varying aluminium-silica aerogel loadings were prepared and denoted as ASZ1, ASZ2, ASZ3, and ASZ4, corresponding to 10 %, 20 %, 30 %, and 40 % (wt), respectively, of Al–SiO2 aerogel incorporated onto ZnO NPs. This approach addresses ZnO intrinsic photo-corrosion and the mechanical fragility of conventional silica aerogels, integrating a high-porosity, mechanically robust framework with an optically active semiconductor. The composites (ASZ1–ASZ4) were systematically characterized using XRD, FTIR, FESEM, BET-BJH analysis, UV–Vis spectroscopy, and (PL) spectroscopy to elucidate correlations between crystallinity, defect states, optical bandgap, and nanostructured morphology. BET analysis revealed a large surface area of approximately 769 m2/g for the aluminium -silica aerogel. As for the optimal formulation, ASZ3, exhibited the largest interplanar spacing (0.1845 nm), balanced lattice strain (0.004096), a red-shifted bandgap (2.82 eV), and the lowest PL emission intensity, indicative of suppressed electron-hole recombination. Morphological analysis confirmed uniform ZnO dispersion within a highly porous aerogel network with the smallest particle size of 25–40 nm for sample ASZ3, promoting efficient light harvesting and pollutant adsorption. The photocatalytic performance of the ASZ3 nanocomposite far surpassed that of pristine ZnO, achieving rapid and nearly complete MB degradation. These findings demonstrate the potential of aluminium-silica aerogel-supported ZnO as a scalable, eco-friendly platform for high-performance photocatalytic wastewater remediation.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3159-3174"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving broadband and efficient near-infrared luminescence in Fe3+-doped Na3Sc2(PO4)3 phosphor 在Fe3+掺杂的Na3Sc2(PO4)3荧光粉中实现宽带和高效近红外发光

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.115

Songbo Li , Jiayong Si , Li Guihua , Gemei Cai

As an alternative to Cr³⁺, Fe³⁺ ions are emerging and used for the near-infrared (NIR) activators. Compared with the toxicity in Cr³⁺-activated NIR phosphors to a certain extent, Fe³⁺-doped NIR phosphors have the feasibility of application in environmental and biological fields. Nevertheless, the development of Fe³⁺-doped phosphate phosphors with the integration of broadband emission, high quantum efficiency (QE), and excellent thermal stability remains a significant challenge. In this study, we tailored a series of Fe³⁺-doped Na₃Sc₂(PO₄)₃ (NSP) broadband near-infrared phosphors. The interaction mechanism between crystal structure and luminescence performance in this phosphor is studied. Under 325 nm excitation, the peak emission at 835 nm (⁴T₁(⁴G)→⁶A₁(⁶S)) originating from the Fe³⁺ occupying the Sc³⁺ unit site is obtained in optimal NIR emission phosphor, and the corresponding full width at half maximum (FWHM) is 144 nm. Thanks to the high lattice distortion, the internal and external quantum efficiencies of 45.7 % and 32.2 % are achieved, respectively. The mechanism of the emission intensity changing with ambient temperature is studied. A broadband near-infrared pc-LED is fabricated using NSP:0.016Fe³⁺ and 310 nm LED chips, and its potential application in night vision field is demonstrated.

作为Cr3+的替代品，Fe3+离子正在兴起并用于近红外（NIR）活化剂。与Cr3+活化的近红外荧光粉在一定程度上的毒性相比，Fe3+掺杂近红外荧光粉在环境和生物领域具有应用的可行性。然而，开发具有宽带发射、高量子效率（QE）和优异热稳定性的掺Fe3+磷酸盐荧光粉仍然是一个重大挑战。在这项研究中，我们定制了一系列Fe3+掺杂Na3Sc2(PO4)3 （NSP）宽带近红外荧光粉。研究了该荧光粉晶体结构与发光性能之间的相互作用机理。在325 nm激发下，最优的近红外发射荧光粉在835 nm处（4T1（4G）→6A1(6S)）的发射峰来自占据Sc3+单元位点的Fe3+，相应的半峰全宽（FWHM）为144 nm。由于高晶格畸变，内部和外部量子效率分别达到45.7%和32.2%。研究了辐射强度随环境温度变化的机理。采用NSP:0.016Fe3+和310 nm LED芯片制备了宽带近红外pc-LED，并展示了其在夜视领域的潜在应用。

{"title":"Achieving broadband and efficient near-infrared luminescence in Fe3+-doped Na3Sc2(PO4)3 phosphor","authors":"Songbo Li , Jiayong Si , Li Guihua , Gemei Cai","doi":"10.1016/j.ceramint.2025.12.115","DOIUrl":"10.1016/j.ceramint.2025.12.115","url":null,"abstract":"<div><div>As an alternative to Cr3+, Fe3+ ions are emerging and used for the near-infrared (NIR) activators. Compared with the toxicity in Cr3+-activated NIR phosphors to a certain extent, Fe3+-doped NIR phosphors have the feasibility of application in environmental and biological fields. Nevertheless, the development of Fe3+-doped phosphate phosphors with the integration of broadband emission, high quantum efficiency (QE), and excellent thermal stability remains a significant challenge. In this study, we tailored a series of Fe3+-doped Na3Sc2(PO4)3 (NSP) broadband near-infrared phosphors. The interaction mechanism between crystal structure and luminescence performance in this phosphor is studied. Under 325 nm excitation, the peak emission at 835 nm (4T1(4G)→6A1(6S)) originating from the Fe3+ occupying the Sc3+ unit site is obtained in optimal NIR emission phosphor, and the corresponding full width at half maximum (FWHM) is 144 nm. Thanks to the high lattice distortion, the internal and external quantum efficiencies of 45.7 % and 32.2 % are achieved, respectively. The mechanism of the emission intensity changing with ambient temperature is studied. A broadband near-infrared pc-LED is fabricated using NSP:0.016Fe3+ and 310 nm LED chips, and its potential application in night vision field is demonstrated.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3237-3244"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Y2Mg2Al2Ge2O12:Ni2+ phosphors capable of NIR-II emission with enhanced luminescent performance through Si4+ substitution Y2Mg2Al2Ge2O12：能够发射NIR-II的Ni2+荧光粉，通过Si4+取代增强了发光性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.124

Yuanyuan Chen, Honghui Zhang, Hucheng Zhou

This work presents high-performance Ni²⁺-activated garnet phosphors for near-infrared light sources. Through solid-state synthesis, we developed Y₂Mg₂Al₂Ge₂O₁₂:Ni²⁺ phosphors that exhibit broadband emission centered at 1385 nm under 420 nm excitation. Strategic partial substitution of Ge⁴⁺ with Si⁴⁺ significantly enhanced the luminescence properties: the emission redshifted to 1410 nm, with a 1.53 × increase in intensity and a quantum yield improvement from 48.7 % to 66.2 %. Thermal stability analysis revealed a higher activation energy (0.313 eV compared to 0.239 eV) in Si-modified samples, which can be attributed to lattice rigidification and bandgap widening. Structural and spectroscopic characterizations (XRD, XPS, ESR) confirmed that Ni²⁺ occupies octahedral Mg²⁺ sites, while crystal field calculations elucidated the mechanism behind emission tuning. The fabricated NIR pc-LEDs demonstrated the viability for night-vision imaging and encrypted information detection, thereby highlighting their potential for practical photonic applications.

本研究提出了用于近红外光源的高性能Ni2+活化石榴石荧光粉。通过固态合成，我们开发了Y2Mg2Al2Ge2O12:Ni2+荧光粉，在420 nm激发下表现出以1385 nm为中心的宽带发射。Si4+策略性部分取代Ge4+显著提高了发光性能：发射红移至1410 nm，强度提高1.53倍，量子产率从48.7%提高到66.2%。热稳定性分析表明，si改性样品的活化能（0.313 eV）高于0.239 eV，这可归因于晶格硬化和带隙扩大。结构和光谱表征（XRD， XPS， ESR）证实Ni2+占据了八面体Mg2+的位置，而晶体场计算则阐明了发射调谐的机制。制备的近红外pc- led显示了夜视成像和加密信息检测的可行性，从而突出了它们在实际光子应用中的潜力。

{"title":"Y2Mg2Al2Ge2O12:Ni2+ phosphors capable of NIR-II emission with enhanced luminescent performance through Si4+ substitution","authors":"Yuanyuan Chen, Honghui Zhang, Hucheng Zhou","doi":"10.1016/j.ceramint.2025.12.124","DOIUrl":"10.1016/j.ceramint.2025.12.124","url":null,"abstract":"<div><div>This work presents high-performance Ni2+-activated garnet phosphors for near-infrared light sources. Through solid-state synthesis, we developed Y2Mg2Al2Ge2O12:Ni2+ phosphors that exhibit broadband emission centered at 1385 nm under 420 nm excitation. Strategic partial substitution of Ge4+ with Si4+ significantly enhanced the luminescence properties: the emission redshifted to 1410 nm, with a 1.53 × increase in intensity and a quantum yield improvement from 48.7 % to 66.2 %. Thermal stability analysis revealed a higher activation energy (0.313 eV compared to 0.239 eV) in Si-modified samples, which can be attributed to lattice rigidification and bandgap widening. Structural and spectroscopic characterizations (XRD, XPS, ESR) confirmed that Ni2+ occupies octahedral Mg2+ sites, while crystal field calculations elucidated the mechanism behind emission tuning. The fabricated NIR pc-LEDs demonstrated the viability for night-vision imaging and encrypted information detection, thereby highlighting their potential for practical photonic applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3338-3345"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cr3+, Co2+, and Ni2+-doped CePO4 glassy films: Tunable optical and high-performance supercapacitor properties Cr3+， Co2+和Ni2+掺杂的CePO4玻璃薄膜：可调光学和高性能超级电容器性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.132

Ammar Qasem , Halemah I. El-Saeedy , Ali Alshomrany , Eshraq Al-Amery

Glassy CePO₄ matrices were prepared using the melt-quenching method to assess their potential as multifunctional materials. The incorporation of Cr³⁺, Co²⁺, and Ni²⁺ ions enabled controlled modification of structural, optical, and electrochemical properties. The characterization process included evaluating structural stability, optical constants, surface uniformity, electrical behavior, and electrochemical performance through CV, GCD, EIS, and dQ/dV analyses. The phosphate network remained intact, and the dopant ions were uniformly integrated, resulting in highly transparent films with tunable absorption edges and adjustable bandgaps. Electrochemical measurements showed a significant enhancement in charge-transfer kinetics, with R_ct decreasing from ∼120 Ω (pure) to ∼60 Ω (Cr³⁺), ∼35 Ω (Co²⁺), and ∼15 Ω (Ni²⁺). CV revealed higher redox peak currents and a substantial reduction in ΔEp, reaching ∼20 mV for Ni²⁺. GCD confirmed improved charge–discharge characteristics, and Ni²⁺-doped films retained ∼94 % of their capacitance after 2000 cycles. These behaviors indicate the creation of multiple redox-active centers and improved ion-transport pathways. As a result, the doped CePO₄ films combine tunable optoelectronic properties with excellent capacitive performance, making them promising candidates for advanced photonic components and high-efficiency energy-storage devices. Further studies should explore optimized dopant concentrations, co-doping strategies, and integration into practical device architectures, along with long-term durability and thermal-stability evaluations.

采用熔融猝灭法制备了玻璃状CePO4基质，以评估其作为多功能材料的潜力。Cr3+、Co2+和Ni2+离子的掺入使得结构、光学和电化学性能得到了可控的修饰。表征过程包括通过CV、GCD、EIS和dQ/dV分析评估结构稳定性、光学常数、表面均匀性、电学行为和电化学性能。磷酸盐网络保持完整，掺杂离子均匀集成，形成具有可调吸收边缘和可调带隙的高透明薄膜。电化学测量显示电荷转移动力学显著增强，Rct从~ 120 Ω（纯）降至~ 60 Ω （Cr3+）、~ 35 Ω （Co2+）和~ 15 Ω （Ni2+）。CV显示出更高的氧化还原峰值电流和大幅降低ΔEp， Ni2+达到~ 20 mV。GCD证实了改进的充放电特性，并且掺杂Ni2+的薄膜在2000次循环后保持了~ 94%的电容。这些行为表明了多个氧化还原活性中心的形成和离子传输途径的改善。因此，掺杂的CePO4薄膜结合了可调谐的光电特性和优异的电容性能，使其成为先进光子元件和高效储能器件的有希望的候选者。进一步的研究应该探索优化的掺杂浓度，共掺杂策略，以及与实际设备架构的集成，以及长期耐久性和热稳定性评估。

{"title":"Cr3+, Co2+, and Ni2+-doped CePO4 glassy films: Tunable optical and high-performance supercapacitor properties","authors":"Ammar Qasem , Halemah I. El-Saeedy , Ali Alshomrany , Eshraq Al-Amery","doi":"10.1016/j.ceramint.2025.12.132","DOIUrl":"10.1016/j.ceramint.2025.12.132","url":null,"abstract":"<div><div>Glassy CePO4 matrices were prepared using the melt-quenching method to assess their potential as multifunctional materials. The incorporation of Cr3+, Co2+, and Ni2+ ions enabled controlled modification of structural, optical, and electrochemical properties. The characterization process included evaluating structural stability, optical constants, surface uniformity, electrical behavior, and electrochemical performance through CV, GCD, EIS, and dQ/dV analyses. The phosphate network remained intact, and the dopant ions were uniformly integrated, resulting in highly transparent films with tunable absorption edges and adjustable bandgaps. Electrochemical measurements showed a significant enhancement in charge-transfer kinetics, with Rct decreasing from ∼120 Ω (pure) to ∼60 Ω (Cr3+), ∼35 Ω (Co2+), and ∼15 Ω (Ni2+). CV revealed higher redox peak currents and a substantial reduction in ΔEp, reaching ∼20 mV for Ni2+. GCD confirmed improved charge–discharge characteristics, and Ni2+-doped films retained ∼94 % of their capacitance after 2000 cycles. These behaviors indicate the creation of multiple redox-active centers and improved ion-transport pathways. As a result, the doped CePO4 films combine tunable optoelectronic properties with excellent capacitive performance, making them promising candidates for advanced photonic components and high-efficiency energy-storage devices. Further studies should explore optimized dopant concentrations, co-doping strategies, and integration into practical device architectures, along with long-term durability and thermal-stability evaluations.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3399-3417"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145995985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of lead-free superparaelectric BaTiO3-based relaxor ferroelectrics with superior energy storage performance 具有优异储能性能的无铅超准电batio3基弛豫铁电体的设计

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.11.044

Jiangping Huang, Lian Deng, Haochen Duan, Yu Zhang, Hailin Zhang, Xu Li, Xiuli Chen, Huanfu Zhou

Dielectric capacitors are widely utilized in high-power electronic devices for their high-power density, rapid discharge speed, and outstanding reliability. However, their lower energy storage performance poses a significant barrier to further miniaturization. Relaxor ferroelectrics are considered promising dielectric energy storage materials, yet balancing energy storage density and efficiency remains challenging. In this study, we present a novel approach via manipulating a superparaelectric state in barium titanate (BaTiO₃)-based ceramics to simultaneously enhance the energy storage density and efficiency. The superparaelectric state engineer the domain evolution of highly dynamic polar nano-microregions to reduce the domain switching barriers, thereby effectively minimizing hysteresis loss and delaying premature polarization saturation behavior. Additionally, it enhances conduction activation energy, thereby improving breakdown electric strength. Benefiting from these synergistic effects, we achieve a decent recoverable energy storage density of 6.4 J cm⁻³ with a high efficiency of 89.2 % at an electric field of 720 kV cm⁻¹, while maintaining outstanding energy storage stability. Our findings present a viable pathway for developing the state-of-the-art energy storage materials in various systems.

介质电容器以其功率密度高、放电速度快、可靠性好等优点被广泛应用于大功率电子器件中。然而，它们较低的能量存储性能对进一步小型化构成了重大障碍。弛豫铁电体被认为是很有前途的介质储能材料，但平衡储能密度和效率仍然是一个挑战。在这项研究中，我们提出了一种新的方法，通过操纵钛酸钡（BaTiO3）基陶瓷的超电态来同时提高能量存储密度和效率。超超电态设计了高动态极性纳米微区域的域演化，以减少域切换势垒，从而有效地减少磁滞损失和延迟过早极化饱和行为。此外，它还能提高传导活化能，从而提高击穿电强度。得益于这些协同效应，我们在720 kV cm−1的电场下实现了6.4 J cm−3的可回收储能密度，效率高达89.2%，同时保持了出色的储能稳定性。我们的发现为在各种系统中开发最先进的储能材料提供了一条可行的途径。

{"title":"Design of lead-free superparaelectric BaTiO3-based relaxor ferroelectrics with superior energy storage performance","authors":"Jiangping Huang, Lian Deng, Haochen Duan, Yu Zhang, Hailin Zhang, Xu Li, Xiuli Chen, Huanfu Zhou","doi":"10.1016/j.ceramint.2025.11.044","DOIUrl":"10.1016/j.ceramint.2025.11.044","url":null,"abstract":"<div><div>Dielectric capacitors are widely utilized in high-power electronic devices for their high-power density, rapid discharge speed, and outstanding reliability. However, their lower energy storage performance poses a significant barrier to further miniaturization. Relaxor ferroelectrics are considered promising dielectric energy storage materials, yet balancing energy storage density and efficiency remains challenging. In this study, we present a novel approach via manipulating a superparaelectric state in barium titanate (BaTiO3)-based ceramics to simultaneously enhance the energy storage density and efficiency. The superparaelectric state engineer the domain evolution of highly dynamic polar nano-microregions to reduce the domain switching barriers, thereby effectively minimizing hysteresis loss and delaying premature polarization saturation behavior. Additionally, it enhances conduction activation energy, thereby improving breakdown electric strength. Benefiting from these synergistic effects, we achieve a decent recoverable energy storage density of 6.4 J cm−3 with a high efficiency of 89.2 % at an electric field of 720 kV cm−1, while maintaining outstanding energy storage stability. Our findings present a viable pathway for developing the state-of-the-art energy storage materials in various systems.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 2745-2754"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving excellent biodegradability and bioactivity in spark plasma sintered porous hydroxyapatite composite scaffolds via modulating nano-MgO addition 通过调节纳米氧化镁的添加，获得了火花等离子烧结多孔羟基磷灰石复合材料良好的生物降解性和生物活性

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.169

Wenjie Huang , Lilin Luo , Wenda Hua , Yuqin Zhang , Zengdong Meng

Porous hydroxyapatite(HA)-based scaffolds have demonstrated limited clinical effectiveness in bone defect repair, primarily due to the functional mismatch between biodegradation and osteoconduction. Integrating therapeutic metal oxide nanoparticles into bioscaffolds is a widely recognized and effective strategy to address this challenge. In this study, series of nano-MgO/HA composite scaffolds were fabricated by combining a space-holder strategy with spark plasma sintering (SPS) technology under pressure less. The composition, structural characteristics, in vitro long-term biodegradability, bioactivity, biocompatibility and their interactions were systematically investigated. The results revealed that composite scaffolds primarily consisted of HA and MgO phases. Besides, due to the inhibitory effect of nano-MgO, the grains within the composite scaffold remain nanocrystalline, with sizes <100 nm. Upon the addition of nano-MgO, the pore characteristics were enhanced, with overall porosity ranging from approximately 49%–56% and average pore sizes between 246 μm and 318 μm. Biodegradation tests conducted in Tris-HCl buffer solution demonstrated that the degradation rate of composite scaffolds increased to 32.79% in 12 weeks, compared to 4.14% for HA scaffold. Furthermore, in simulated body fluid (SBF), composite scaffolds exhibited a dramatically improved capacity for osteoapatite formation, with the weight gain rate increasing from 1.5% for HA scaffold to 11.46%. Fundamentally, these stem from the preferential dissolution of nano-MgO, which shifts the scaffold's degradation behavior from surface corrosion to pitting corrosion, thereby expanding the solid-liquid interface. Moreover, the internal acicular nanocrystals within it accelerate the degradation and deposition process while providing additional nucleation sites for osteapatite formation. These findings suggest that when the nano-MgO content was 16.6 wt%, the scaffolds (10MH) exhibited suitable pore characteristics, excellent biodegradability and bioactivity and good biocompatibility. In summary, hydroxyapatite composite scaffolds adding bioabsorbable nano-MgO represent highly promising biomaterials for bone regeneration.

多孔羟基磷灰石（HA）支架在骨缺损修复中的临床效果有限，主要是由于生物降解和骨传导之间的功能不匹配。将治疗性金属氧化物纳米颗粒整合到生物支架中是解决这一挑战的一种广泛认可的有效策略。在本研究中，将空间支架策略与放电等离子烧结（SPS）技术相结合，制备了一系列纳米mgo /HA复合支架。系统地研究了其组成、结构特性、体外长期生物降解性、生物活性、生物相容性及其相互作用。结果表明，复合支架主要由HA相和MgO相组成。此外，由于纳米氧化镁的抑制作用，复合支架内的颗粒保持纳米晶状，尺寸为100 nm。添加纳米氧化镁后，孔隙特征得到增强，孔隙率在49% ~ 56%之间，平均孔径在246 ~ 318 μm之间。在Tris-HCl缓冲液中进行的生物降解试验表明，复合支架的降解率在12周内提高到32.79%，而HA支架的降解率为4.14%。此外，在模拟体液（SBF）中，复合材料支架的骨磷灰石形成能力显著提高，其增重率从HA支架的1.5%提高到11.46%。从根本上说，这源于纳米mgo的优先溶解，它将支架的降解行为从表面腐蚀转变为点蚀，从而扩大了固液界面。此外，其内部的针状纳米晶体加速了降解和沉积过程，同时为骨磷灰石的形成提供了额外的成核位点。结果表明，当纳米mgo含量为16.6 wt%时，支架（10MH）具有合适的孔隙特性，具有良好的生物降解性和生物活性，具有良好的生物相容性。综上所述，添加生物可吸收纳米氧化镁的羟基磷灰石复合支架是一种非常有前途的骨再生生物材料。

{"title":"Achieving excellent biodegradability and bioactivity in spark plasma sintered porous hydroxyapatite composite scaffolds via modulating nano-MgO addition","authors":"Wenjie Huang , Lilin Luo , Wenda Hua , Yuqin Zhang , Zengdong Meng","doi":"10.1016/j.ceramint.2025.12.169","DOIUrl":"10.1016/j.ceramint.2025.12.169","url":null,"abstract":"<div><div>Porous hydroxyapatite(HA)-based scaffolds have demonstrated limited clinical effectiveness in bone defect repair, primarily due to the functional mismatch between biodegradation and osteoconduction. Integrating therapeutic metal oxide nanoparticles into bioscaffolds is a widely recognized and effective strategy to address this challenge. In this study, series of nano-MgO/HA composite scaffolds were fabricated by combining a space-holder strategy with spark plasma sintering (SPS) technology under pressure less. The composition, structural characteristics, in vitro long-term biodegradability, bioactivity, biocompatibility and their interactions were systematically investigated. The results revealed that composite scaffolds primarily consisted of HA and MgO phases. Besides, due to the inhibitory effect of nano-MgO, the grains within the composite scaffold remain nanocrystalline, with sizes <100 nm. Upon the addition of nano-MgO, the pore characteristics were enhanced, with overall porosity ranging from approximately 49%–56% and average pore sizes between 246 μm and 318 μm. Biodegradation tests conducted in Tris-HCl buffer solution demonstrated that the degradation rate of composite scaffolds increased to 32.79% in 12 weeks, compared to 4.14% for HA scaffold. Furthermore, in simulated body fluid (SBF), composite scaffolds exhibited a dramatically improved capacity for osteoapatite formation, with the weight gain rate increasing from 1.5% for HA scaffold to 11.46%. Fundamentally, these stem from the preferential dissolution of nano-MgO, which shifts the scaffold's degradation behavior from surface corrosion to pitting corrosion, thereby expanding the solid-liquid interface. Moreover, the internal acicular nanocrystals within it accelerate the degradation and deposition process while providing additional nucleation sites for osteapatite formation. These findings suggest that when the nano-MgO content was 16.6 wt%, the scaffolds (10MH) exhibited suitable pore characteristics, excellent biodegradability and bioactivity and good biocompatibility. In summary, hydroxyapatite composite scaffolds adding bioabsorbable nano-MgO represent highly promising biomaterials for bone regeneration.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3770-3786"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interactions between components of LSI SiC/SiC in oxidation environment 氧化环境下LSI SiC/SiC元件间的相互作用

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.11.237

Guangda Guo, Fang Ye, Laifei Cheng

LSI SiC/SiC composites have garnered significant research interest owing to their low porosity, excellent specific strength, and superior thermal conductivity. However, their ultimate strength declines sharply after high-temperature exposure near or above the melting point of Si, and the underlying degradation mechanisms remain inadequately understood. In this study, a typical LSI SiC/SiC composite reinforced with Cansas 3303 SiC fibers is systematically investigated to elucidate the degradation of mechanical properties and the associated mechanisms following heat treatment at 1500 °C under both inert and oxidizing atmospheres. A multi-scale analysis is conducted for the first time: at the mesoscale, morphology evolutions of the composite surface and interior are characterized; at the microscale, microstructure changes in regions adjacent to the fibers are closely examined. The mechanism of strength degradation can be summarized as that under an inert atmosphere, Si undergoes solid-phase diffusion, causing limited damage to the CVI SiC layer. In an oxidizing atmosphere, oxygen accelerates Si-driven degradation, leading to progressive and extensive damage to the CVI SiC layer, BN interphase, and SiC fibers. These findings offer another way to improve the long-term durability of LSI SiC/SiC composites at high temperatures and in complex environments—not just by reducing residual Si, but also by using protective coatings to limit Si activity and prevent strength loss.

LSI SiC/SiC复合材料由于其低孔隙率、优异的比强度和优异的导热性而获得了重要的研究兴趣。然而，在接近或高于Si熔点的高温暴露后，它们的极限强度急剧下降，潜在的降解机制仍不充分了解。在本研究中，系统地研究了一种典型的用Cansas 3303 SiC纤维增强的LSI SiC/SiC复合材料，以阐明在惰性和氧化气氛下1500°C热处理后机械性能的退化及其相关机制。首次进行了多尺度分析：在中尺度上，表征了复合材料表面和内部的形貌演变；在微观尺度上，纤维附近区域的微观结构变化被仔细检查。强度退化的机理可以概括为：在惰性气氛下，Si进行固相扩散，对CVI SiC层造成有限的损伤。在氧化气氛中，氧加速了硅驱动的降解，导致CVI SiC层、BN间相和SiC纤维的逐渐和广泛的损伤。这些发现为提高LSI SiC/SiC复合材料在高温和复杂环境下的长期耐久性提供了另一种方法——不仅通过减少残余Si，而且通过使用保护涂层来限制Si活性并防止强度损失。

{"title":"Interactions between components of LSI SiC/SiC in oxidation environment","authors":"Guangda Guo, Fang Ye, Laifei Cheng","doi":"10.1016/j.ceramint.2025.11.237","DOIUrl":"10.1016/j.ceramint.2025.11.237","url":null,"abstract":"<div><div>LSI SiC/SiC composites have garnered significant research interest owing to their low porosity, excellent specific strength, and superior thermal conductivity. However, their ultimate strength declines sharply after high-temperature exposure near or above the melting point of Si, and the underlying degradation mechanisms remain inadequately understood. In this study, a typical LSI SiC/SiC composite reinforced with Cansas 3303 SiC fibers is systematically investigated to elucidate the degradation of mechanical properties and the associated mechanisms following heat treatment at 1500 °C under both inert and oxidizing atmospheres. A multi-scale analysis is conducted for the first time: at the mesoscale, morphology evolutions of the composite surface and interior are characterized; at the microscale, microstructure changes in regions adjacent to the fibers are closely examined. The mechanism of strength degradation can be summarized as that under an inert atmosphere, Si undergoes solid-phase diffusion, causing limited damage to the CVI SiC layer. In an oxidizing atmosphere, oxygen accelerates Si-driven degradation, leading to progressive and extensive damage to the CVI SiC layer, BN interphase, and SiC fibers. These findings offer another way to improve the long-term durability of LSI SiC/SiC composites at high temperatures and in complex environments—not just by reducing residual Si, but also by using protective coatings to limit Si activity and prevent strength loss.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 2769-2782"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating grain orientation enhances thermoelectric properties of textured Ca0.85La0.1MnO3 ceramics 调整晶粒取向可提高Ca0.85La0.1MnO3织构陶瓷的热电性能

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.095

Zongmo Shi , Bo Chen , Yuqing Qi , Quan Yang , Sijie Tong , Yuan Liu , Geping He , Fang Song

CaMnO₃-based thermoelectric materials attract significant interest due to their high-temperature stability. Textured Ca_0.85La_0.1MnO₃ ceramics were prepared using the tape casting method combined with template grain growth. The effects of template seed additions on the grain orientation and thermoelectric properties of Ca_0.85La_0.1MnO₃ ceramics were investigated. By simultaneously controlling grain orientation, boundaries, and A-site vacancies, electrical and thermal transport properties were enhanced. During the grain growth process, the micro/nano-scale Ca_0.85La_0.1MnO₃ matrix grains was guided by the plate-like CaMnO₃ template seeds, resulting in the formation of textured grains. The 37.2 % texture degree was achieved for the sample with 15 wt% template seeds, yielding a power factor of 0.42 mW/(m·K²). The lattice thermal conductivity was 1.17 W/(m·K) at 1073 K, which was 16 % lower than that of the non-oriented sample. The improvement boosted the ZT value of 0.26, presenting the increment of 225 % compared the sample without template seed additives. The strategy offers promising potential for developing high-efficiency oxide thermoelectric materials.

基于camno3的热电材料由于其高温稳定性而引起了人们的极大兴趣。采用带铸结合模板晶粒生长的方法制备了Ca0.85La0.1MnO3织构陶瓷。研究了模板种子添加量对Ca0.85La0.1MnO3陶瓷晶粒取向和热电性能的影响。通过同时控制晶粒取向、晶界和a位空位，增强了材料的电输运和热输运性能。在晶粒生长过程中，微纳Ca0.85La0.1MnO3基体晶粒受到板状CaMnO3模板种子的引导，形成织构晶粒。当模板种子质量为15 wt%时，样品的织构度达到37.2%，功率因数为0.42 mW/（m·K2）。在1073 K时，晶格热导率为1.17 W/(m·K)，比非取向样品低16%。改良后的ZT值提高了0.26，比未添加模板种子的样品提高了225%。该策略为开发高效氧化物热电材料提供了广阔的前景。

{"title":"Regulating grain orientation enhances thermoelectric properties of textured Ca0.85La0.1MnO3 ceramics","authors":"Zongmo Shi , Bo Chen , Yuqing Qi , Quan Yang , Sijie Tong , Yuan Liu , Geping He , Fang Song","doi":"10.1016/j.ceramint.2025.12.095","DOIUrl":"10.1016/j.ceramint.2025.12.095","url":null,"abstract":"<div><div>CaMnO3-based thermoelectric materials attract significant interest due to their high-temperature stability. Textured Ca0.85La0.1MnO3 ceramics were prepared using the tape casting method combined with template grain growth. The effects of template seed additions on the grain orientation and thermoelectric properties of Ca0.85La0.1MnO3 ceramics were investigated. By simultaneously controlling grain orientation, boundaries, and A-site vacancies, electrical and thermal transport properties were enhanced. During the grain growth process, the micro/nano-scale Ca0.85La0.1MnO3 matrix grains was guided by the plate-like CaMnO3 template seeds, resulting in the formation of textured grains. The 37.2 % texture degree was achieved for the sample with 15 wt% template seeds, yielding a power factor of 0.42 mW/(m·K2). The lattice thermal conductivity was 1.17 W/(m·K) at 1073 K, which was 16 % lower than that of the non-oriented sample. The improvement boosted the ZT value of 0.26, presenting the increment of 225 % compared the sample without template seed additives. The strategy offers promising potential for developing high-efficiency oxide thermoelectric materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 2996-3004"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Ba0.98x0.02Ti0.98y0.02O3 (x = La, y = Zr, Cu) catalysts incorporated cellulose acetate membrane for fast photo-removal of Congo red effluents 新型Ba0.98x0.02Ti0.98y0.02O3 （x = La, y = Zr, Cu）催化剂在醋酸纤维素膜上的应用研究

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.102

Ghayah M. Alsulaim, Asia R.Y. Almuhana

In this study, BaTiO₃, Ba_0.98La_0.02Ti_0.98Zr_0.02O₃ and Ba_0.98La_0.02Ti_0.98Cu_0.02O₃ photocatalysts have been synthesized by sol gel method. The X-ray diffraction (XRD) results confirmed that the powders have a tetragonal phase of BaTiO₃ structure. The scanning electron microscope (SEM) micrographs showed the formation of homogenous grains, particularly Ba_0.98La_0.02Ti_0.98Cu_0.02O₃ powder. The modification of BaTiO₃ by La-Zr and La-Cu ions shifts the band gap energy from 3.25 eV to 3.06 and 2.91 eV, respectively. The valence oxidation states of Ba, Ti, La, and Cu were estimated by X-ray photoelectron analysis as +4, +4/+3, +3 and + 2, respectively. The photocatalytic studies demonstrated that Ba_0.98La_0.02Ti_0.98Cu_0.02O₃ powder has a degradation efficiency of ∼100 % for 30 ppm Congo red under sunlight irradiation in 48 min. To overcome the problem of catalyst recovery, a new flexible catalyst-membrane was fabricated through combining Ba_0.98La_0.02Ti_0.98Cu_0.02O₃ photocatalyst with cellulose acetate (CA). The photocatalytic experiments shown that Ba_0.98La_0.02Ti_0.98Cu_0.02O₃/cellulose acetate membrane (Ba_0.98La_0.02Ti_0.98Cu_0.02O₃/CA) has a degradation efficiency 96 % for 20 ppm Congo red after 70 min of sunlight irradiation. Furthermore, the reusability of Ba_0.98La_0.02Ti_0.98Cu_0.02O₃/CA photocatalyst was estimated over 3 successive rounds, indicating a high stability. These results open the door towards the design of effective visible-light-sensitive photocatalyst to eliminate organic contaminants in wastewater.

本研究采用溶胶-凝胶法制备了BaTiO3、Ba0.98La0.02Ti0.98Zr0.02O3和Ba0.98La0.02Ti0.98Cu0.02O3光催化剂。x射线衍射（XRD）结果证实粉末具有四方相的BaTiO3结构。扫描电镜（SEM）显微图显示，晶粒均质，以Ba0.98La0.02Ti0.98Cu0.02O3粉末为主。La-Zr和La-Cu离子对BaTiO3的改性使带隙能从3.25 eV分别提高到3.06和2.91 eV。通过x射线光电子分析，Ba、Ti、La和Cu的价态氧化态分别为+4、+4/+3、+3和+ 2。光催化研究表明，Ba0.98La0.02Ti0.98Cu0.02O3粉末在阳光照射下48 min对30 ppm刚果红的降解效率为~ 100%。为了克服催化剂的回收问题，将Ba0.98La0.02Ti0.98Cu0.02O3光催化剂与醋酸纤维素（CA）结合制备了一种新型柔性催化剂膜。光催化实验表明，Ba0.98La0.02Ti0.98Cu0.02O3/醋酸纤维素膜（Ba0.98La0.02Ti0.98Cu0.02O3/CA）对20ppm刚果红的降解效率为96%。此外，对Ba0.98La0.02Ti0.98Cu0.02O3/CA光催化剂的可重复使用性进行了连续3轮的评估，表明其具有较高的稳定性。这些结果为设计有效的可见光敏感光催化剂来消除废水中的有机污染物打开了大门。

{"title":"New Ba0.98x0.02Ti0.98y0.02O3 (x = La, y = Zr, Cu) catalysts incorporated cellulose acetate membrane for fast photo-removal of Congo red effluents","authors":"Ghayah M. Alsulaim, Asia R.Y. Almuhana","doi":"10.1016/j.ceramint.2025.12.102","DOIUrl":"10.1016/j.ceramint.2025.12.102","url":null,"abstract":"<div><div>In this study, BaTiO3, Ba0.98La0.02Ti0.98Zr0.02O3 and Ba0.98La0.02Ti0.98Cu0.02O3 photocatalysts have been synthesized by sol gel method. The X-ray diffraction (XRD) results confirmed that the powders have a tetragonal phase of BaTiO3 structure. The scanning electron microscope (SEM) micrographs showed the formation of homogenous grains, particularly Ba0.98La0.02Ti0.98Cu0.02O3 powder. The modification of BaTiO3 by La-Zr and La-Cu ions shifts the band gap energy from 3.25 eV to 3.06 and 2.91 eV, respectively. The valence oxidation states of Ba, Ti, La, and Cu were estimated by X-ray photoelectron analysis as +4, +4/+3, +3 and + 2, respectively. The photocatalytic studies demonstrated that Ba0.98La0.02Ti0.98Cu0.02O3 powder has a degradation efficiency of ∼100 % for 30 ppm Congo red under sunlight irradiation in 48 min. To overcome the problem of catalyst recovery, a new flexible catalyst-membrane was fabricated through combining Ba0.98La0.02Ti0.98Cu0.02O3 photocatalyst with cellulose acetate (CA). The photocatalytic experiments shown that Ba0.98La0.02Ti0.98Cu0.02O3/cellulose acetate membrane (Ba0.98La0.02Ti0.98Cu0.02O3/CA) has a degradation efficiency 96 % for 20 ppm Congo red after 70 min of sunlight irradiation. Furthermore, the reusability of Ba0.98La0.02Ti0.98Cu0.02O3/CA photocatalyst was estimated over 3 successive rounds, indicating a high stability. These results open the door towards the design of effective visible-light-sensitive photocatalyst to eliminate organic contaminants in wastewater.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3078-3088"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and multiferroic properties of 2-2 type Bi4-xNdxTi2.9Fe0.1O12/La0.67Sr0.33MnO3 composite films tuned by Nd-substitution 2-2型Bi4-xNdxTi2.9Fe0.1O12/La0.67Sr0.33MnO3复合薄膜的结构和多铁性

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2026-01-01 DOI: 10.1016/j.ceramint.2025.12.125

Zongfan Duan , Ziyang Jia , Bingjie Li , Huiwen Deng , Weirong Quan , Ruihao Wang , Shuoqing Cui , Yu Liu , Dongjie Liu

Nd-substitution was carried out at the Bi-site of the Bi₄Ti_2.9Fe_0.1O₁₂ single-phase multiferroic material and the as-designed Bi_4-xNd_xTi_2.9Fe_0.1O₁₂ (BN_xTF, x = 0.65, 0.70, 0.75, 0.80, 0.85) was subsequently compounded with ferromagnetic La_0.67Sr_0.33MnO₃ (LSMO) to fabricate the 2-2 layer type magnetoelectric (ME) composite films. The effects of Nd-substitution content on the microstructure and multiferroic properties of BN_xTF/LSMO composite films were intensively studied. Remarkably, the dielectric constant (ε_r) and residual polarization intensity (P_r) of the composite films first increased and then decreased with the increasing Nd-substitution content, while the leakage current density (J), dielectric loss (tanδ) and coercive electric field (E_c) exhibited the opposite trend. The optimal Nd-substitution concentration is x = 0.75, and the lowest J of 8.31 × 10⁻⁶ A/cm² and the highest P_r of 33.7 μC/cm² were achieved in the BN_0.75TF/LSMO composite film. It also exhibited excellent zero-bias ME coupling behavior and showed the maximum ME coupling coefficient (α_E) of 12.93 V/cm·Oe at room temperature, which is significantly superior to most reported ferromagnetic-ferroelectric composite films.

将设计的bi4 - xndxti2.9 fe0.10 o12 （BNxTF, x = 0.65, 0.70, 0.75, 0.80, 0.85）与铁磁La0.67Sr0.33MnO3 （LSMO）复合，制备了2-2层型磁电（ME）复合薄膜。研究了nd取代含量对BNxTF/LSMO复合膜微观结构和多铁性能的影响。随着nd取代量的增加，复合膜的介电常数（εr）和剩余极化强度（Pr）呈现先增大后减小的趋势，而漏电流密度(J)、介电损耗（tanδ）和矫顽力电场（Ec）呈现相反的趋势。BN0.75TF/LSMO复合膜的最佳nd取代浓度为x = 0.75，最低J为8.31 × 10−6 A/cm2，最高Pr为33.7 μC/cm2。室温下的最大ME耦合系数（αE）为12.93 V/cm·Oe，明显优于已有报道的大多数铁磁-铁电复合薄膜。

{"title":"Structural and multiferroic properties of 2-2 type Bi4-xNdxTi2.9Fe0.1O12/La0.67Sr0.33MnO3 composite films tuned by Nd-substitution","authors":"Zongfan Duan , Ziyang Jia , Bingjie Li , Huiwen Deng , Weirong Quan , Ruihao Wang , Shuoqing Cui , Yu Liu , Dongjie Liu","doi":"10.1016/j.ceramint.2025.12.125","DOIUrl":"10.1016/j.ceramint.2025.12.125","url":null,"abstract":"<div><div>Nd-substitution was carried out at the Bi-site of the Bi4Ti2.9Fe0.1O12 single-phase multiferroic material and the as-designed Bi4-xNdxTi2.9Fe0.1O12 (BNxTF, x = 0.65, 0.70, 0.75, 0.80, 0.85) was subsequently compounded with ferromagnetic La0.67Sr0.33MnO3 (LSMO) to fabricate the 2-2 layer type magnetoelectric (ME) composite films. The effects of Nd-substitution content on the microstructure and multiferroic properties of BNxTF/LSMO composite films were intensively studied. Remarkably, the dielectric constant (εr) and residual polarization intensity (Pr) of the composite films first increased and then decreased with the increasing Nd-substitution content, while the leakage current density (J), dielectric loss (tanδ) and coercive electric field (Ec) exhibited the opposite trend. The optimal Nd-substitution concentration is x = 0.75, and the lowest J of 8.31 × 10−6 A/cm2 and the highest Pr of 33.7 μC/cm2 were achieved in the BN0.75TF/LSMO composite film. It also exhibited excellent zero-bias ME coupling behavior and showed the maximum ME coupling coefficient (αE) of 12.93 V/cm·Oe at room temperature, which is significantly superior to most reported ferromagnetic-ferroelectric composite films.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 3","pages":"Pages 3346-3357"},"PeriodicalIF":5.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145996448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0