Ceramics International最新文献_第10页

Dandelion-like Co3O4/Zn–Mn oxide heterostructures as high-capacity battery-type electrodes for hybrid supercapacitors 类似蒲公英的Co3O4/ Zn-Mn氧化物异质结构用作混合超级电容器的大容量电池型电极

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.ceramint.2026.01.069

Mulla Jakeer Hussain , Mohamed A. Ghanem , Y. Veera Manohara Reddy , Nipa Roy , Ramanadha Mangiri , G. Madhavi

Developing nanostructured electrode materials with strong interfacial integration and high redox activity remains a critical challenge in advancing hybrid supercapacitor (HSC) technology. In this study, a hierarchical dandelion-like Co₃O₄–ZnMn₂O₄/ZnMnO₃ heterostructure nanocomposite was synthesized directly on nickel foam (NF) via a two-step solvothermal process followed by annealing. The synthesis strategy enables the formation of a robust, interconnected nanowire network composed of Co₃O₄ and Zn–Mn oxide phases, eliminating the need for binders and ensuring strong contact with the current collector. Comprehensive structural and morphological characterizations confirm the formation of a 3D nanoscale architecture with increased electroactive sites and porous channels, facilitating rapid electron transport and ion diffusion. The synergistic interaction between Co₃O₄ and the ZnMn₂O₄/ZnMnO₃ phases enhances redox kinetics and electrochemical reversibility. As a battery-type electrode for HSCs, the Co₃O₄–ZnMn₂O₄/ZnMnO₃ electrode delivers a high specific capacity of 1723.6 C g⁻¹ at 1.0 A g⁻¹, which is approximately four times higher than that of reported single-phase ZnMn₂O₄ electrodes and markedly superior to pristine Co₃O₄, while retaining 86 % of its capacity at a tenfold higher current density. Moreover, the electrode maintains 93 % capacity retention over 5000 cycles, demonstrating excellent long-term cycling stability. A hybrid supercapacitor (HSC) device was constructed using Co₃O₄–ZnMn₂O₄/ZnMnO₃ as the cathode and activated carbon (AC) as the anode. The assembled HSC delivered a high energy density of 49.64 Wh kg⁻¹ at a power density of 1000 W kg⁻¹, demonstrating its promising energy–power characteristics. These results highlight the potential of interface-engineered heterostructure nanocomposites directly grown on conductive substrates as promising candidates for high-performance energy storage applications.

开发具有强界面集成和高氧化还原活性的纳米结构电极材料仍然是推进混合超级电容器（HSC）技术的关键挑战。在本研究中，采用两步溶剂热法和退火法，直接在泡沫镍（NF）上合成了层次化的蒲公英状Co3O4-ZnMn2O4 /ZnMnO3异质结构纳米复合材料。该合成策略能够形成由Co3O4和Zn-Mn氧化物相组成的坚固、互连的纳米线网络，从而消除了对粘合剂的需求，并确保与电流收集器的强接触。全面的结构和形态表征证实了三维纳米结构的形成，具有增加的电活性位点和多孔通道，促进了快速的电子传递和离子扩散。Co3O4与ZnMn2O4/ZnMnO3相之间的协同作用增强了氧化还原动力学和电化学可逆性。作为hsc的电池型电极，Co3O4 - ZnMn2O4/ZnMnO3电极在1.0 a g−1下的比容量高达1723.6 C g−1，比已有报道的单相ZnMn2O4电极高出约4倍，明显优于原始Co3O4，同时在电流密度提高10倍的情况下保持86%的容量。此外，电极在5000次循环中保持93%的容量保持，表现出优异的长期循环稳定性。以Co3O4-ZnMn2O4 /ZnMnO3为阴极，活性炭（AC）为阳极，构建了复合超级电容器（HSC）器件。在1000 W kg - 1的功率密度下，组装的HSC提供了49.64 Wh kg - 1的高能量密度，展示了其良好的能量-功率特性。这些结果突出了直接生长在导电衬底上的界面工程异质结构纳米复合材料作为高性能储能应用的有希望的候选者的潜力。

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引用次数: 0

Interfacial bonding and fracture mechanism of tempered glass and aluminium alloy direct welding by top-hat nanosecond laser 顶帽纳秒激光钢化玻璃与铝合金直焊界面粘接及断裂机理研究

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI: 10.1016/j.ceramint.2026.01.037

Yi Rong , Yaxing Wang , Jiake Deng , Wentao Li , Luping Yang , Chaoqian Zhao , Xiaoyu Ding , Liang Wang , Jianhua Yao

To alleviate the tempered glass fragmentation and interface stress concentration caused by excessive thermal stress in the laser welding process, a top-hat nanosecond laser was used for direct welding of tempered glass and 6061 aluminum alloy. Well-formed welding joints with characteristic Newton's rings were obtained without requiring optical contact. The maximum shear strength of the joint reached 16.7 MPa when the laser energy density is 0.058 J/mm² and the laser scanning speed is 18 mm/s, reflecting the effectiveness of the laser welding process in promoting well-interfacial interaction between the tempered glass and 6061 aluminum alloy under laser thermal ablation and laser-induced plasma recoil forces. The joint exhibited a fracture pattern concentrated within the heat-affected zone of the tempered glass, with evident brittle fracture characteristics observed on both sides. The interface between the glass and aluminum alloy was primarily composed of Al₂O₃ and Al-Si-O phases. Due to the top-hat energy distribution of the nanosecond laser, thermal damage at the joint is reduced. At the same time, the high shear strength of the joint arose from metallurgical bonding resulting from interfacial reaction and a macroscopic mechanical interlocking structure. The proposed top-hat nanosecond laser welding would provide a low-cost and efficient welding process window for the direct joining of tempered glass and metal.

为了缓解激光焊接过程中由于热应力过大造成的钢化玻璃碎裂和界面应力集中，采用顶帽纳秒激光对钢化玻璃与6061铝合金进行了直接焊接。在不需要光学接触的情况下，获得了具有特征牛顿环的成形良好的焊接接头。当激光能量密度为0.058 J/mm2，激光扫描速度为18 mm/s时，接头的最大剪切强度达到16.7 MPa，反映了激光焊接工艺在激光热烧蚀和激光诱导等离子体反冲力作用下促进钢化玻璃与6061铝合金界面良好相互作用的有效性。接头的断裂模式集中在钢化玻璃热影响区内，两侧均有明显的脆性断裂特征。玻璃与铝合金的界面主要由Al2O3和Al-Si-O相组成。由于纳秒激光的顶帽能量分布，降低了接头的热损伤。同时，由于界面反应产生的冶金结合和宏观力学联锁结构使接头具有较高的抗剪强度。所提出的顶帽纳秒激光焊接为钢化玻璃与金属的直接连接提供了一种低成本、高效率的焊接工艺窗口。

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引用次数: 0

A vitrified bond diamond grinding wheel prepared by DLP and grinding performance on single crystal silicon wafer DLP制备的玻璃化结合剂金刚石砂轮及其在单晶硅片上的磨削性能

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-16 DOI: 10.1016/j.ceramint.2026.01.153

Jun-yong Zeng , Feng-lin Zhang , Pu Gao , Wei Yang , Xiao-yi Pan

In order to improve the cooling and chip accommodation ability of the wheel in grinding of silicon wafer, we proposed a novel vitrified bond diamond wheel with arrays of micro-channel (AMC) by an additive manufacturing methods based on digital light processing (DLP). The composition of DLP slurry was optimized by examine the rheological behavior and curing properties for resin system, solid loading, content of photoinitiator and diamond abrasive. Furthermore, the sintering temperature on mechanical properties of debinded segments was also investigated. Finally, the grinding performance of vitrified bond AMC wheel on single crystal silicon wafer was evaluated in comparison with a solid structured (SS) wheel based on DLP.A molecular dynamics (MD) simulation was also used to characterize the material removal of silicon wafer in the grinding process. The results indicate that the slurry composed of 24 wt % resin (70 wt % HDDA and 30 wt % PPTTA), 2 wt % TPO, 49 vol % solid loading and 25 vol% diamond abrasive show the sufficient fluidity and good curing performance. Under a sintering temperature of 560 °C, the grinding wheel segments can obtain a maximum flexural strength of 77 MPa with a Rockwell hardness of 75 HRB. In the grinding process, the AMC wheel produces a higher grinding ratio (49) and a lower surface roughness (Ra 0.059 μm) on silicon wafer in comparison with SS wheel. Molecular dynamics (MD) simulations indicate that increasing the grinding speed decreases the grinding force but increases the grinding temperature. In contrast, increasing the grinding depth simultaneously increases both the grinding force and the grinding temperature. Furthermore, higher grinding speeds and small grinding depths (feed rates) help reduce grinding-wheel wear and improve the wear ratio under the combined effects of grinding force and temperature.

为了提高砂轮在硅片磨削中的冷却和芯片调节能力，采用基于数字光处理（DLP）的增材制造方法，提出了一种新型微通道阵列玻璃化结合剂金刚石砂轮。通过考察树脂体系、固体载荷、光引发剂含量和金刚石磨料的流变性能和固化性能，优化了DLP浆料的组成。此外，还研究了烧结温度对脱粘段力学性能的影响。最后，比较了玻璃化结合剂AMC砂轮与基于DLP的固体结构砂轮在单晶硅片上的磨削性能。采用分子动力学模拟方法对硅片磨削过程中的材料去除进行了表征。结果表明，由树脂（70 wt % HDDA和30 wt % PPTTA）、TPO （2 wt % TPO）、固体载荷（49 vol%）和金刚石磨料（25 vol%）组成的浆料具有足够的流动性和良好的固化性能。在560℃的烧结温度下，砂轮片的最大抗折强度为77 MPa，洛氏硬度为75 HRB。在磨削过程中，与SS砂轮相比，AMC砂轮在硅片上的磨削比（49）更高，表面粗糙度（Ra 0.059 μm）更低。分子动力学（MD）模拟表明，磨削速度的增加使磨削力减小，但使磨削温度升高。增加磨削深度，磨削力和磨削温度同时升高。在磨削力和温度共同作用下，较高的磨削速度和较小的磨削深度（进给量）有助于降低砂轮磨损，提高磨损比。

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引用次数: 0

Visible-light-driven hydrogen production and hydrolysis-hydrogenation of corn (Zea mays) starch for high-yield production of sorbitol using highly active Ag/AgBr nanowires photocatalyst 利用高活性Ag/AgBr纳米线光催化剂对玉米（Zea mays）淀粉进行可见光制氢和水解加氢以高产山梨醇

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.ceramint.2026.01.169

Zarah Alqarni , H. Algarni

In the chemical industry, selective hydrogenation is employed to advance pharmaceutical research, develop medical products, and manufacture fine chemicals or petrochemicals. It is one of the most common methods for controlling chemical reactions to form pure products. Specific functional groups can be hydrogenated selectively without affecting other reactive sites of the molecules by carefully selecting catalysts and reaction conditions. This selective approach reduces the formation of byproducts, thereby increasing product yields. In this study, we report the hydrolysis and subsequent hydrogenation of corn starch (Zea mays) to sorbitol using Ag/AgBr nanospheres and nanowires as photocatalysts, with NaHSO₃ as the hydrogen source under visible-light irradiation. Maize starch was successfully hydrolyzed and hydrogenated to sorbitol with 90.1 % yield using a minimum catalytic load (100ppm) under visible-light irradiation. These results emphasize that selective hydrogenation under visible-light irradiation is a versatile, green, and efficient approach for producing sorbitol in high yields.

在化学工业中，选择性加氢被用于推进药物研究、开发医疗产品、制造精细化学品或石化产品。这是控制化学反应生成纯产物的最常用方法之一。通过精心选择催化剂和反应条件，特定官能团可以在不影响分子其他活性位点的情况下选择性氢化。这种选择性方法减少了副产物的形成，从而提高了产品产量。在这项研究中，我们报道了以Ag/AgBr纳米球和纳米线为光催化剂，以NaHSO3为氢源，在可见光照射下，将玉米淀粉（Zea mays）水解并随后加氢为山梨醇。在可见光照射下，以最小催化负荷（100ppm）成功地将玉米淀粉水解加氢为山梨糖醇，产率为90.1%。这些结果强调了可见光照射下的选择性加氢是一种多功能、绿色和高效的高产山梨醇生产方法。

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引用次数: 0

Benzoylacetone-induced (400) facet preference in ITO films and its enhancement on conductive properties 苯甲酰丙酮诱导ITO薄膜的（400）面偏好及其对导电性能的增强

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2025-12-31 DOI: 10.1016/j.ceramint.2025.12.453

Yu Fang , Yang Ren , Yutong Song , Yun Zhou , Yunwei Wang , Gaoyang Zhao

The electrical conductivity of indium tin oxide (ITO) films is predominantly governed by carrier concentration and mobility. At Sn doping saturation, further carrier concentration increase becomes limited; However, improving carrier mobility emerges as an effective strategy to elevate the conductivity of ITO films. In this study, the chemical modifier Benzoylacetone(BzAcH) was employed to regulate the growth kinetics of ITO grains, inducing a highly preferential (400) crystallographic orientation and facilitating the formation of a well-aligned crystalline structure. This structural optimization effectively reduces carrier scattering, leading to a significant enhancement in carrier mobility. Additionally, the influence mechanism of BzAcH concentration on grain growth was systematically investigated. The results demonstrate that the preferential orientation of the (400) facet exhibits a non-monotonic trend with increasing BzAcH concentration—initially ascending and subsequently descending. At the optimal BzAcH concentration, the (400) crystallographic orientation reaches its maximum degree of alignment, resulting in a carrier mobility of 91.6 cm² V⁻¹ s⁻¹ (a 97.4 % increase compared to the unmodified sample) and a resistivity as low as 1.35 × 10⁻⁴ Ω cm (a 73 % reduction relative to the unmodified sample). These findings provide a viable and reproducible strategy for advancing the high-conductivity performance of ITO films in electronic applications.

氧化铟锡（ITO）薄膜的导电性主要受载流子浓度和迁移率的影响。在锡掺杂饱和时，载流子浓度的进一步增加变得有限；然而，提高载流子迁移率是提高ITO薄膜导电性的有效策略。本研究采用化学改性剂苯甲酰丙酮（BzAcH）调节ITO晶粒的生长动力学，诱导高度优先的（400）晶体取向，促进排列良好的晶体结构的形成。这种结构优化有效地降低了载流子散射，导致载流子迁移率显著提高。此外，系统探讨了BzAcH浓度对籽粒生长的影响机理。结果表明，随着BzAcH浓度的增加，（400）面优先取向呈现出先上升后下降的非单调趋势。在最佳BzAcH浓度下，（400）晶体取向达到最大排列程度，导致载流子迁移率为91.6 cm2 V−1 s−1（与未修饰样品相比增加97.4%），电阻率低至1.35 × 10−4 Ω cm（相对于未修饰样品降低73%）。这些发现为提高ITO薄膜在电子应用中的高导电性提供了一种可行且可重复的策略。

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引用次数: 0

Synthesis and characterization of Fe-doped diopside bioceramics with potential for magnetic hyperthermia and photothermal applications 具有磁热疗和光热应用潜力的掺铁透辉石生物陶瓷的合成与表征

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-02 DOI: 10.1016/j.ceramint.2025.12.499

Fatemeh Dehghan , Rahmatollah Emadi , Mehdi Ahmadian , Fariborz Tavangarian

The development of biomaterials capable of simultaneously eliminating cancer cells and promoting bone regeneration is crucial for advancing postoperative bone cancer therapy In this study, nanostructured diopside (DIO) and iron-doped diopside (Fe-DIO) with Fe molar fractions (x) of 0.05, 0.15, and 0.25 were synthesized using sol–gel method. These materials were evaluated for their potential applications in magnetic hyperthermia, photothermal therapy, and bone tissue engineering. Structural and morphological properties were characterized by X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HR-TEM), Field Emission Scanning Electron Microscopy (FE-SEM), Vibrating Sample Magnetometry (VSM), Fourier Transform Infrared Spectroscopy (FT-IR), and Energy Dispersive X-ray Spectroscopy (EDS) analyses. Crystallite size decreased from 24.1 nm in pure DIO to 18.4 nm in 0.25Fe-DIO. Among all samples, 0.15Fe-DIO demonstrated the most efficient heating performance, reaching a 10 °C temperature increase under an alternating magnetic field (400 kHz, 2.9 kA/m), and achieving a photothermal temperature of 70 °C under 808 nm laser irradiation (2.5 W/cm², 300 s), indicating strong NIR-triggered photothermal heating. Cytotoxicity evaluation using MG63 cells showed over 80 % viability at 1000 μg/mL, with enhanced biocompatibility observed for 0.15Fe-DIO at lower concentrations (85 % viability at 100 μg/mL, p < 0.05). Collectively, the results indicated that 0.15Fe-DIO is a promising multifunctional biomaterial for minimally invasive cancer therapy and bone regeneration.

开发能够同时消灭癌细胞和促进骨再生的生物材料对于推进术后骨癌治疗至关重要。本研究采用溶胶-凝胶法合成了铁摩尔分数(x)分别为0.05、0.15和0.25的纳米结构透辉皂苷（DIO）和掺铁透辉皂苷（Fe-DIO）。评估了这些材料在磁热疗、光热治疗和骨组织工程方面的潜在应用。通过x射线衍射（XRD）、高分辨率透射电子显微镜（HR-TEM）、场发射扫描电子显微镜（FE-SEM）、振动样品磁强计（VSM）、傅里叶变换红外光谱（FT-IR）和能量色散x射线光谱（EDS）分析表征了其结构和形态。晶粒尺寸从纯DIO的24.1 nm减小到0.25Fe-DIO的18.4 nm。在所有样品中，0.15Fe-DIO表现出最有效的加热性能，在交变磁场（400 kHz, 2.9 kA/m）下温度升高10°C，在808 nm激光照射（2.5 W/cm2, 300 s）下光热温度达到70°C，表明nir触发的光热加热很强。MG63细胞在1000 μg/mL浓度下的细胞毒性评估显示80%以上的细胞活力，0.15Fe-DIO在较低浓度下的生物相容性增强（100 μg/mL浓度下85%的细胞活力，p < 0.05）。综上所述，0.15Fe-DIO是一种很有前途的多功能生物材料，可用于微创肿瘤治疗和骨再生。

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引用次数: 0

Enhancing the capacitive energy storage performance of BNT-based ceramics under low electric fields via Bi(Zn1/2Zr1/2)O3 modification and phase competition 通过Bi(Zn1/2Zr1/2)O3改性和相竞争提高bnt基陶瓷在低电场条件下的容性储能性能

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2025-12-29 DOI: 10.1016/j.ceramint.2025.12.476

Chongwen Yu , Yan Li , Zong-Yang Shen , Dong-Xu Li , You Zhang , Biao Wu , Wenqing Luo

In advanced pulsed power systems, dielectric capacitors have attracted considerable research attention owing to their characteristics including ultrahigh power density and fast charge-discharge capabilities. However, current research methods predominantly concentrate on enhancing energy storage through elevated electric fields, while often neglecting the performance under practical low electric field. In this work, the BiMeO₃-based compound Bi(Zn_1/2Zr_1/2)O₃ (BZZ) is used to modify BNT-based ceramics to strengthen their dielectric and ferroelectric properties. As the content of BZZ increases, the dielectric constant at the dielectric peak and the corresponding transition temperature T_m decreases, while the energy density increases. Especially, the substitution of the complex cations (Zn_1/2Zr_1/2)³⁺ enhances the chemical disorder at the B-site ions and induces the R3c/P4bm/Pm

\overline{3}

m phases competition. With the highest fractions of P4bm phase and relatively high fractions of Pm

\overline{3}

m phase, the 0.94(Ba_0.3Sr_0.7)_0.35(Bi_0.5Na_0.5)_0.65TiO₃-0.06Bi(Zn_1/2Zr_1/2)O₃ (BNBST-0.06BZZ) ceramics achieves a high recoverable energy density of 2.9 J/cm³ together with an energy efficiency of 81 % under a low electric field of 170 kV/cm. Moreover, this ceramics also exhibits good energy storage stability, endurance, and fast charging-discharging speeds, indicating its significant potential in electrostatic capacitor applications. This work proposes a promising approach for enhancing the energy storage performance of BNT-based lead-free ceramics under a low electric field through BZZ modification and complex cations substitution that induces phase competition, which also establishes a relationship between the phase structure and polarization behavior.

在先进的脉冲电源系统中，介质电容器以其超高的功率密度和快速的充放电能力而备受关注。然而，目前的研究方法主要集中在通过提高电场来增强储能，而往往忽视了在实际低电场下的性能。在这项工作中，bimeo3基化合物Bi(Zn1/2Zr1/2)O3 （BZZ）被用来修饰bnt基陶瓷，以增强其介电和铁电性能。随着BZZ含量的增加，介电峰处介电常数和相应的转变温度Tm减小，能量密度增大。特别是，络合阳离子（Zn1/2Zr1/2）3+的取代增强了b位离子的化学无序性，诱导了R3c/P4bm/Pm 3 - m相竞争。具有最高分数的P4bm相和相对较高分数的Pm 3- m相，0.94(Ba0.3Sr0.7)0.35(Bi0.5Na0.5)0.65TiO3-0.06Bi(zn1 / 2zr2 /2)O3 （BNBST-0.06BZZ）陶瓷在170 kV/cm的低电场下实现了2.9 J/cm3的高可回收能量密度和81%的能量效率。此外，该陶瓷还具有良好的储能稳定性、耐久性和快速的充放电速度，表明其在静电电容器中的应用潜力巨大。本工作提出了一种在低电场下通过BZZ改性和复合阳离子取代诱导相竞争来提高bbnt基无铅陶瓷储能性能的有前途的方法，并建立了相结构与极化行为之间的关系。

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引用次数: 0

Structural and electrical properties of low-cost La0.6Sr0.4Co0.2Fe0.8O3−δ–waste hematite composite towards integration in electrolyte-layer free fuel cell 低成本La0.6Sr0.4Co0.2Fe0.8O3−δ -废赤铁矿复合材料在无电解质层燃料电池中的结构和电学性能

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.ceramint.2026.01.077

Oumaima Ettalibi , Abdelmaula Aboulaich , Sanae Bayou , Mohammed Mansori , Ouafae Achak , Tarik Chafik

The present study aims to harness iron-rich mining waste, specifically hematite (Fe₂O₃) derived from the oxidation treatment of pyrrhotite (Fe₇S₈), into a functional ceramic pellet towards integration in electrolyte-layer free fuel cell (EFFC) or single-component fuel cell systems. A simple heat treatment and composite fabrication process was adopted, supported by a comprehensive investigation of morphological, structural, and electrical properties of the resulting waste hematite material (WHM) and La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF). The latter was synthesized via the glycine-nitrate combustion method and incorporated into the WHM matrix using direct solid-state mixing followed by high temperature sintering. The WHM powder exhibited a very low BET surface area of 0.0374 m²/g and negligible porosity. Thermal and structural stability was confirmed by the powder X-ray diffraction (XRD) and thermogravimetric analysis (TGA) for both WHM and the resulting LSCF-WHM composite. The effect of heat treatment temperature on electrical conductivity was investigated in the temperature range of 600–800 °C using electrochemical impedance spectroscopy (EIS). A high total conductivity of about 6.57 × 10⁻¹ S/cm was obtained at 800 °C with the composite material containing mass ratios of 3:7 (3LSCF:7WHM) prepared following an empirical approach by varying different compositions. These findings pave the way for the valorization of mining waste through the development of advanced intermediate layers for EFFCs, an emerging SOFC-based technology.

本研究的目的是利用富含铁的采矿废物，特别是由磁黄铁矿（Fe7S8）氧化处理产生的赤铁矿（Fe2O3），将其转化为功能性陶瓷颗粒，用于无电解质层燃料电池（EFFC）或单组分燃料电池系统中。采用简单的热处理和复合制备工艺，对废赤铁矿（WHM）和La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF)的形貌、结构和电学性能进行了综合研究。后者是通过甘氨酸-硝酸盐燃烧法合成的，并通过直接固态混合和高温烧结加入到WHM基体中。WHM粉末的BET比表面积非常低，为0.0374 m2/g，孔隙率可以忽略不计。通过粉末x射线衍射（XRD）和热重分析（TGA）证实了WHM和LSCF-WHM复合材料的热稳定性和结构稳定性。利用电化学阻抗谱（EIS）研究了热处理温度在600 ~ 800℃范围内对导电性能的影响。在800℃的温度下，采用经验方法制备了质量比为3:7 （3LSCF:7WHM）的复合材料，获得了约6.57 × 10−1 S/cm的高总电导率。这些发现为通过开发先进的effc中间层（一种新兴的基于sofc的技术）为采矿废物的增值铺平了道路。

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引用次数: 0

Microstructure, mechanical and thermal properties of (Gd1/4Dy1/4Y1/4Er1/4)TaO4 high-entropy ceramics sintered from nanopowder prepared by reverse chemical co-precipitation and freeze drying methods 用反相化学共沉淀法和冷冻干燥法制备的纳米粉体烧结（Gd1/4Dy1/4Y1/4Er1/4）陶4高熵陶瓷的显微结构、力学和热性能

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-05 DOI: 10.1016/j.ceramint.2026.01.057

Zihan Zhang , Guojian Jiang , Yunze Jin , Zhenming Zhao , Dandan Wu , Weidan Ma

RETaO₄ ceramic materials exhibit exceptional properties, including reversible second-order ferroelastic phase transformations, high fracture toughness, and low thermal conductivity, making them ideal for use as new multifunctional thermal barrier coatings (TBCs). In this study, nanoscale (Gd_1/4Dy_1/4Y_1/4Er_1/4)TaO₄ ((4RE_1/4)TaO₄) ceramic powders were synthesized via the chemical co-precipitation method. The effects of processing parameters such as NH₃·H₂O concentration, drying method, and sintering temperature on the morphology and particle size of the (4RE_1/4)TaO₄ precursor powder were systematically investigated. The (4RE_1/4)TaO₄ ceramics were prepared by sintering, and their microstructure, mechanical properties, and thermal conductivity were studied. The (4RE_1/4)TaO₄ ceramics have lower thermal conductivity (∼1.32 W m^-1 K^-1 at 1000 °C) than YSZ ceramics, attributed to the high-entropy effect resulting from the introduction of multiple rare earth elements. Furthermore, (4RE_1/4)TaO₄ demonstrates superior thermal barrier coatings materials (TBCs), has a higher thermal expansion coefficient (10.3 × 10^-6 K^-1 at 1200 °C), lower Young's modulus (78.4 GPa), and enhanced high-temperature phase stability relative to single rare-earth tantalates. The high-entropy design and nanopowder preparation are conducive to improving the performance of high-entropy ceramics and promoting their promotion and application in thermal barrier coatings.

RETaO4陶瓷材料具有优异的性能，包括可逆的二阶铁弹性相变，高断裂韧性和低导热性，使其成为新型多功能热障涂层（tbc）的理想选择。本研究采用化学共沉淀法合成了纳米级（Gd1/4Dy1/4Y1/4Er1/4）陶4 （（4RE1/4）陶4）陶瓷粉体。系统研究了NH3·H2O浓度、干燥方式、烧结温度等工艺参数对（4RE1/4）陶4前驱体粉体形貌和粒度的影响。采用烧结法制备了（4RE1/4）陶4陶瓷，并对其微观结构、力学性能和导热性能进行了研究。（4RE1/4）陶4陶瓷的导热系数比YSZ陶瓷低（1000℃时约1.32 W m-1 K-1），这是由于引入了多种稀土元素而产生的高熵效应。此外，与单一稀土钽酸盐相比，（4RE1/4）陶4具有更高的热膨胀系数（在1200℃时为10.3 × 10-6 K-1）、更低的杨氏模量（78.4 GPa）和更强的高温相稳定性。高熵设计和纳米粉体制备有利于提高高熵陶瓷的性能，促进其在热障涂层中的推广应用。

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引用次数: 0

Unique role of BSF glass in overcoming conventional glass-ceramic limitations in BNT for enhanced energy storage BSF玻璃在克服传统玻璃陶瓷在BNT中的限制以增强能量存储方面的独特作用

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.ceramint.2026.01.060

A. Ouaha , S. Taoussi , Y. Hadouch , K. Hoummada , D. Mezzane , L. Bih

This study reveals a departure from typical behavior in glass-ceramics, namely that the addition of glasses reduces dielectric polarization owing to their low dielectric character. Notably, incorporating a distinct relaxor-like class of glass (BSF) into pristine Bi_0.5Na_0.5TiO₃ (BNT) ceramics significantly bolstered their energy storage capabilities. The latter alters the ferroelectric response, yielding slimmer P-E loops, a higher maximum polarization, and a substantially greater W_rec. Optimal compositions (2–4 wt% BSF) achieve 132.5 mJ/cm³ with 70 % peak efficiency, outperforming the 42.4 mJ/cm³ at 42 % efficiency for BNT. An interplay of elemental diffusion, interfacial polarization, and microstructural refinement promotes reversible domain switching, resulting in these enhancements. Possible field-induced polarization saturation at higher BSF contents gives rise to an exceptionally high P_max (42.7 μC/cm²), demonstrating high polarizability levels for a glass-ceramic composite. This work highlights the unique role of the BSF glass in overcoming conventional limitations and offers a tunable route to high-efficiency, sustainable energy storage materials with potential applications in multifunctional technologies and devices.

该研究揭示了与玻璃陶瓷的典型行为不同，即玻璃的加入由于其低介电特性而降低了介电极化。值得注意的是，在原始的Bi0.5Na0.5TiO3 （BNT）陶瓷中加入一种独特的弛豫类玻璃（BSF），显著增强了它们的储能能力。后者改变了铁电响应，产生更细的P-E环，更高的最大极化和更大的Wrec。最佳成分（2-4 wt% BSF）达到132.5 mJ/cm3，峰值效率为70%，优于BNT的42.4 mJ/cm3，效率为42%。元素扩散、界面极化和微观结构细化的相互作用促进了可逆的畴切换，从而导致了这些增强。当BSF含量较高时，可能的场致极化饱和会产生异常高的Pmax (42.7 μC/cm2)，表明玻璃陶瓷复合材料具有较高的极化率水平。这项工作突出了BSF玻璃在克服传统限制方面的独特作用，并为高效、可持续的储能材料提供了可调的途径，在多功能技术和设备中具有潜在的应用前景。

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引用次数: 0