Ceramics International最新文献_第6页

Impact of alkali and iron oxide content on the AC conductivity: An impedance spectroscopic study of borate glasses 碱和氧化铁含量对交流电导率的影响：硼酸盐玻璃的阻抗光谱研究

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.2025.12.446

Pavan Kumar C S , C.S. Sumukha , A. Madhu , Satwik Prathap N V , Murugendrappa M. V , Manjunatha C. V

The electrical, structural, and physical properties of alkali iron borate glasses with composition (60-x)M₂O-40B₂O₃-xFe₂O₃ (M = Li, Na) with x = 0, 5, 10, and 15 mol% were investigated in this study. All glasses were synthesized by the melt-quenching method. The prepared glasses were analyzed using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and impedance measurements. X-ray diffraction results confirmed the non-crystalline nature of the prepared glass samples. The incorporation of iron oxide (Fe₂O₃) led to an increase in both density and molar volume. Raman and FTIR data show that increasing iron concentration causes a decrease in pyroborate band (∼1360 cm⁻¹) and an increase in bands near 500 cm⁻¹, indicating the conversion of compact BO₃ units into more open BO₄ and diborate structures. Both the dielectric constant (

ε^{'}

) and dielectric loss (

ε^{″}

) of these glasses decreases with frequency. The AC conductivity of all the glasses increased with frequency, reaching a maximum room-temperature value of the order of 10⁻⁵ S/m. At low frequencies (100 Hz), the highest electrical conductivity was observed for sodium iron borate glass with 10 mol% Fe₂O₃ and lithium iron borate glass with 15 mol% Fe₂O₃. The radius of the semicircular arcs in the Cole–Cole plots decreases with increasing Fe₂O₃ concentration and temperature, indicating enhanced electrical conductivity.

本文研究了组成为（60-x） m20 - 40b2o3 - xfe2o3 (M = Li, Na), x = 0、5、10和15 mol%的碱硼酸铁玻璃的电学、结构和物理性能。所有玻璃均采用熔淬法合成。利用x射线衍射（XRD）、拉曼光谱（Raman spectroscopy）、傅立叶变换红外光谱（FTIR）和阻抗测量对所制备的玻璃进行了分析。x射线衍射结果证实了制备的玻璃样品的非结晶性质。氧化铁（Fe2O3）的掺入导致密度和摩尔体积的增加。Raman和FTIR数据表明，铁浓度的增加导致焦硼酸盐能带（~ 1360 cm−1）的减少和500 cm−1附近能带的增加，表明紧凑的BO3单元转变为更开放的BO4和二硼酸盐结构。这些玻璃的介电常数ε′和介电损耗ε″随频率的增加而减小。所有玻璃的交流电导率随频率增加而增加，室温最大值为10−5 S/m。在低频（100 Hz）下，含10 mol% Fe2O3的硼酸铁钠玻璃和含15 mol% Fe2O3的硼酸铁锂玻璃的电导率最高。随着Fe2O3浓度的增加和温度的升高，Cole-Cole图中半圆弧半径减小，表明电导率增强。

{"title":"Impact of alkali and iron oxide content on the AC conductivity: An impedance spectroscopic study of borate glasses","authors":"Pavan Kumar C S , C.S. Sumukha , A. Madhu , Satwik Prathap N V , Murugendrappa M. V , Manjunatha C. V","doi":"10.1016/j.ceramint.2025.12.446","DOIUrl":"10.1016/j.ceramint.2025.12.446","url":null,"abstract":"<div><div>The electrical, structural, and physical properties of alkali iron borate glasses with composition (60-x)M<sub>2</sub>O-40B<sub>2</sub>O<sub>3</sub>-xFe<sub>2</sub>O<sub>3</sub> (M = Li, Na) with x = 0, 5, 10, and 15 mol% were investigated in this study. All glasses were synthesized by the melt-quenching method. The prepared glasses were analyzed using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and impedance measurements. X-ray diffraction results confirmed the non-crystalline nature of the prepared glass samples. The incorporation of iron oxide (Fe<sub>2</sub>O<sub>3</sub>) led to an increase in both density and molar volume. Raman and FTIR data show that increasing iron concentration causes a decrease in pyroborate band (∼1360 cm<sup>−1</sup>) and an increase in bands near 500 cm<sup>−1</sup>, indicating the conversion of compact BO<sub>3</sub> units into more open BO<sub>4</sub> and diborate structures. Both the dielectric constant (<span><math><mrow><msup><mi>ε</mi><mo>′</mo></msup></mrow></math></span>) and dielectric loss (<span><math><mrow><msup><mi>ε</mi><mo>″</mo></msup></mrow></math></span><strong>)</strong> of these glasses decreases with frequency. The AC conductivity of all the glasses increased with frequency, reaching a maximum room-temperature value of the order of 10<sup>−5</sup> S/m. At low frequencies (100 Hz), the highest electrical conductivity was observed for sodium iron borate glass with 10 mol% Fe<sub>2</sub>O<sub>3</sub> and lithium iron borate glass with 15 mol% Fe<sub>2</sub>O<sub>3</sub>. The radius of the semicircular arcs in the Cole–Cole plots decreases with increasing Fe<sub>2</sub>O<sub>3</sub> concentration and temperature, indicating enhanced electrical conductivity.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 6","pages":"Pages 6983-6997"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147411799","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

The SiC-ZrO2 coating with an Al2O3 interface enhanced the temperature resistance of ceramic fiber fabric to 1700 °C 具有Al2O3界面的SiC-ZrO2涂层使陶瓷纤维织物的耐温性能提高到1700℃

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.2025.12.438

Jiangtao Li , Yunjia Xue , Xueying Zhang , Fan Zhang , Wenhao Hu , Jiachen Liu

The SiC-ZrO₂ coating was prepared on the surface of aluminosilicate ceramic fiber fabric (ASFF) to enhance the radiation heat dissipation. However, the Si-sol in the SiC-ZrO₂ coating caused the fiber to adhere together at high temperatures. The brittle fracture of the ASFF led to a deterioration in its temperature resistance. In this paper, an Al₂O₃ interface was prepared on the surface of ASFF by spraying alumina precursor. The Al₂O₃ interface prepared by 3.0 wt% alumina precursor was uniformly covered on the fiber surface. The flexibility of ASFF/Al₂O₃/SiC-ZrO₂ was maintained after static oxidation at 1300 °C for 1 h. The tensile strength of ASFF/Al₂O₃/SiC-ZrO₂ at 1200 °C were increased from 5 to 7 MPa to 21.35 ± 2.58 MPa. The Al₂O₃ interface not only limited the direct contact between Si-gel and fiber, but also reacted with Si-gel to produce mullite at high temperature. The problem of fiber adhesion caused by Si-sol in ASFF matrix was solved. Additionally, the SiC-ZrO₂ coating reduced the surface temperature of ASFF rom 1700 °C–1300 °C. Combining the radiation performance of SiC-ZrO₂ coating and the isolation effect of the Al₂O₃ interface, ASFF/Al₂O₃/SiC-ZrO₂ was able to operate continuously for 300 s under the 1700 °C butane-oxygen flame heating condition.

在硅酸铝陶瓷纤维织物（ASFF）表面制备SiC-ZrO2涂层以增强其辐射散热能力。然而，SiC-ZrO2涂层中的硅溶胶导致纤维在高温下粘附在一起。ASFF的脆性断裂导致其耐温性能下降。本文通过喷涂氧化铝前驱体在ASFF表面制备了Al2O3界面。3.0 wt%氧化铝前驱体制备的Al2O3界面均匀覆盖在纤维表面。ASFF/Al2O3/SiC-ZrO2在1300℃静态氧化1 h后仍保持柔性，ASFF/Al2O3/SiC-ZrO2在1200℃时的抗拉强度由5 ~ 7 MPa提高到21.35±2.58 MPa。Al2O3界面不仅限制了硅凝胶与纤维的直接接触，还会在高温下与硅凝胶反应生成莫来石。解决了硅溶胶在ASFF基体中对纤维的粘附问题。此外，SiC-ZrO2涂层将ASFF的表面温度从1700°C降低到1300°C。结合SiC-ZrO2涂层的辐射性能和Al2O3界面的隔离效果，ASFF/Al2O3/SiC-ZrO2在1700℃的丁烷氧火焰加热条件下可以连续工作300 s。

{"title":"The SiC-ZrO2 coating with an Al2O3 interface enhanced the temperature resistance of ceramic fiber fabric to 1700 °C","authors":"Jiangtao Li , Yunjia Xue , Xueying Zhang , Fan Zhang , Wenhao Hu , Jiachen Liu","doi":"10.1016/j.ceramint.2025.12.438","DOIUrl":"10.1016/j.ceramint.2025.12.438","url":null,"abstract":"<div><div>The SiC-ZrO<sub>2</sub> coating was prepared on the surface of aluminosilicate ceramic fiber fabric (ASFF) to enhance the radiation heat dissipation. However, the Si-sol in the SiC-ZrO<sub>2</sub> coating caused the fiber to adhere together at high temperatures. The brittle fracture of the ASFF led to a deterioration in its temperature resistance. In this paper, an Al<sub>2</sub>O<sub>3</sub> interface was prepared on the surface of ASFF by spraying alumina precursor. The Al<sub>2</sub>O<sub>3</sub> interface prepared by 3.0 wt% alumina precursor was uniformly covered on the fiber surface. The flexibility of ASFF/Al<sub>2</sub>O<sub>3</sub>/SiC-ZrO<sub>2</sub> was maintained after static oxidation at 1300 °C for 1 h. The tensile strength of ASFF/Al<sub>2</sub>O<sub>3</sub>/SiC-ZrO<sub>2</sub> at 1200 °C were increased from 5 to 7 MPa to 21.35 ± 2.58 MPa. The Al<sub>2</sub>O<sub>3</sub> interface not only limited the direct contact between Si-gel and fiber, but also reacted with Si-gel to produce mullite at high temperature. The problem of fiber adhesion caused by Si-sol in ASFF matrix was solved. Additionally, the SiC-ZrO<sub>2</sub> coating reduced the surface temperature of ASFF rom 1700 °C–1300 °C. Combining the radiation performance of SiC-ZrO<sub>2</sub> coating and the isolation effect of the Al<sub>2</sub>O<sub>3</sub> interface, ASFF/Al<sub>2</sub>O<sub>3</sub>/SiC-ZrO<sub>2</sub> was able to operate continuously for 300 s under the 1700 °C butane-oxygen flame heating condition.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 6","pages":"Pages 6904-6913"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147411801","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

Enhanced SO2 response based on morphology evolution and oxide precipitation in mixed-potential sensors with AVO4 (A=Ce, Sm) as sensing electrode 以AVO4 （A=Ce, Sm）为传感电极的混合电位传感器中基于形态演变和氧化物沉淀的SO2响应增强

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-07 DOI: 10.1016/j.ceramint.2025.12.336

Jiaxin Li , Qunwei Guo , Jiangtao Feng , Yinwen Gu , Bo Chi , Jian Pu

To fulfill the real-time monitoring requirements for the high SO₂ concentrations in industrial emissions, yttria-stabilized zirconia (YSZ)-based mixed-potential SO₂ sensors with rare-earth vanadates (AVO₄, A = Ce, Sm) as sensing electrode materials were investigated in this work. The microstructure of the AVO₄ electrode was tuned by adjusting the corresponding sintering temperature (800–1100 °C), reaching the optimal match between particle size and pore structure at 1000 °C. The CeVO₄ sensor sintered at 1000 °C exhibited the best performance at the operation temperature of 400 °C, in which its polyhedral structure and the formation of CeVO₄/CeO₂ heterointerfaces enhanced the diffusion and adsorption of SO₂, achieving a response of −69.73 mV for 500 ppm SO₂ and a sensitivity of −25.92 mV/decade for 50–500 ppm SO₂, significantly higher than that of the SmVO₄ electrode (−18.87 mV, −12.81 mV/decade). Additionally, the sensor can be operated at a wide temperature range from 400 °C to 600 °C. The response/recovery times were significantly shortened to 31 s/45 s (100 ppm) and 11 s/33 s (500 ppm) at 600 °C, approximately 90 % faster than those of 400 °C, while maintaining a sensitivity of −13.06 mV/decade for 50–500 ppm SO₂. Furthermore, the sensor exhibited excellent repeatability and long-term stability at 600 °C, which remained stable for 18 days with a slight response variation of <8 %. This study provides novel material design and optimization strategies for developing high-sensitivity SO₂ sensors with a wide detection range and rapid response ability, which are capable of operating under harsh industrial conditions.

为了满足工业排放中高浓度二氧化硫的实时监测需求，以稀土钒酸盐（AVO4, A = Ce, Sm）为传感电极材料，研究了基于钇稳定氧化锆（YSZ）的混合电位二氧化硫传感器。通过调整相应的烧结温度（800-1100℃）来调整AVO4电极的微观结构，在1000℃时达到颗粒尺寸和孔隙结构的最佳匹配。1000℃烧结的CeVO4传感器在400℃工作温度下表现出最佳性能，其多面体结构和CeVO4/CeO2异质界面的形成增强了SO2的扩散和吸附，对500 ppm SO2的响应为−69.73 mV，对50-500 ppm SO2的灵敏度为−25.92 mV/decade，显著高于SmVO4电极（−18.87 mV,−12.81 mV/decade）。此外，该传感器可以在400°C到600°C的宽温度范围内工作。在600°C时，响应/恢复时间显著缩短至31 s/45 s （100 ppm）和11 s/33 s (500 ppm)，比400°C时快了约90%，同时在50-500 ppm的SO2下保持−13.06 mV/ 10年的灵敏度。此外，该传感器在600°C下具有出色的重复性和长期稳定性，在18天内保持稳定，响应变化为<； 8%。该研究为开发具有宽检测范围和快速响应能力的高灵敏度二氧化硫传感器提供了新的材料设计和优化策略，能够在恶劣的工业条件下运行。

{"title":"Enhanced SO2 response based on morphology evolution and oxide precipitation in mixed-potential sensors with AVO4 (A=Ce, Sm) as sensing electrode","authors":"Jiaxin Li , Qunwei Guo , Jiangtao Feng , Yinwen Gu , Bo Chi , Jian Pu","doi":"10.1016/j.ceramint.2025.12.336","DOIUrl":"10.1016/j.ceramint.2025.12.336","url":null,"abstract":"<div><div>To fulfill the real-time monitoring requirements for the high SO<sub>2</sub> concentrations in industrial emissions, yttria-stabilized zirconia (YSZ)-based mixed-potential SO<sub>2</sub> sensors with rare-earth vanadates (AVO<sub>4</sub>, A = Ce, Sm) as sensing electrode materials were investigated in this work. The microstructure of the AVO<sub>4</sub> electrode was tuned by adjusting the corresponding sintering temperature (800–1100 °C), reaching the optimal match between particle size and pore structure at 1000 °C. The CeVO<sub>4</sub> sensor sintered at 1000 °C exhibited the best performance at the operation temperature of 400 °C, in which its polyhedral structure and the formation of CeVO<sub>4</sub>/CeO<sub>2</sub> heterointerfaces enhanced the diffusion and adsorption of SO<sub>2</sub>, achieving a response of −69.73 mV for 500 ppm SO<sub>2</sub> and a sensitivity of −25.92 mV/decade for 50–500 ppm SO<sub>2</sub>, significantly higher than that of the SmVO<sub>4</sub> electrode (−18.87 mV, −12.81 mV/decade). Additionally, the sensor can be operated at a wide temperature range from 400 °C to 600 °C. The response/recovery times were significantly shortened to 31 s/45 s (100 ppm) and 11 s/33 s (500 ppm) at 600 °C, approximately 90 % faster than those of 400 °C, while maintaining a sensitivity of −13.06 mV/decade for 50–500 ppm SO<sub>2</sub>. Furthermore, the sensor exhibited excellent repeatability and long-term stability at 600 °C, which remained stable for 18 days with a slight response variation of <8 %. This study provides novel material design and optimization strategies for developing high-sensitivity SO<sub>2</sub> sensors with a wide detection range and rapid response ability, which are capable of operating under harsh industrial conditions.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 6","pages":"Pages 6841-6851"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147411805","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

Molecular engineering of 3D porous boron nitride via dual-nitrogen synergy for enhanced tetracycline adsorption 双氮协同作用下三维多孔氮化硼增强四环素吸附的分子工程研究

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2025-12-28 DOI: 10.1016/j.ceramint.2025.12.458

Shihao Zhang , Yanqing Wang , Feng Liu , Lei Ding , Shuxi Wang , Yuhan Wu , Laishi Li , Xudong Sun , Yusheng Wu

The rational design of porous boron nitride (BN) architectures is crucial for enhancing adsorption performance, whereas elucidating the molecular transformation pathways of precursors is equally indispensable for the development of high-efficiency BN-based adsorbents. In this work, a molecular engineering strategy employing urea and guanidine carbonate as dual nitrogen sources is proposed to synthesize a three-dimensional (3D) hierarchical porous BN adsorbent. The evolution of the precursors and the self-assembly mechanism were systematically elucidated through multi-modal characterization and thermal analysis. The as-prepared BN material exhibits a high specific surface area of 476.4 m² g⁻¹ and a pore volume of 0.594 cm³ g⁻¹, contributing to a remarkable tetracycline adsorption capacity of 364.6 mg g⁻¹ in aqueous solution. This work deviates from conventional synthesis paradigms by introducing a green dual-nitrogen-source pyrolysis route, providing fundamental insights into the structural and molecular evolution of BN and contributing to the development of advanced water purification materials.

合理设计多孔氮化硼（BN）结构对于提高吸附性能至关重要，而阐明前驱体的分子转化途径对于开发高效氮化硼基吸附剂同样必不可少。在这项工作中，提出了一种采用尿素和胍碳酸作为双氮源的分子工程策略来合成三维（3D）多孔BN吸附剂。通过多模态表征和热分析系统地阐明了前驱体的演化和自组装机制。制备的BN材料具有476.4 m2 g−1的高比表面积和0.594 cm3 g−1的孔隙体积，在水溶液中具有364.6 mg g−1的四环素吸附量。本研究突破了传统的合成范式，引入了绿色双氮源热解路线，为氮化硼的结构和分子演化提供了基础性的认识，为开发先进的水净化材料做出了贡献。

{"title":"Molecular engineering of 3D porous boron nitride via dual-nitrogen synergy for enhanced tetracycline adsorption","authors":"Shihao Zhang , Yanqing Wang , Feng Liu , Lei Ding , Shuxi Wang , Yuhan Wu , Laishi Li , Xudong Sun , Yusheng Wu","doi":"10.1016/j.ceramint.2025.12.458","DOIUrl":"10.1016/j.ceramint.2025.12.458","url":null,"abstract":"<div><div>The rational design of porous boron nitride (BN) architectures is crucial for enhancing adsorption performance, whereas elucidating the molecular transformation pathways of precursors is equally indispensable for the development of high-efficiency BN-based adsorbents. In this work, a molecular engineering strategy employing urea and guanidine carbonate as dual nitrogen sources is proposed to synthesize a three-dimensional (3D) hierarchical porous BN adsorbent. The evolution of the precursors and the self-assembly mechanism were systematically elucidated through multi-modal characterization and thermal analysis. The as-prepared BN material exhibits a high specific surface area of 476.4 m<sup>2</sup> g<sup>−1</sup> and a pore volume of 0.594 cm<sup>3</sup> g<sup>−1</sup>, contributing to a remarkable tetracycline adsorption capacity of 364.6 mg g<sup>−1</sup> in aqueous solution. This work deviates from conventional synthesis paradigms by introducing a green dual-nitrogen-source pyrolysis route, providing fundamental insights into the structural and molecular evolution of BN and contributing to the development of advanced water purification materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 6","pages":"Pages 7122-7131"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147411812","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

Balanced properties in Mn doped PZT-5H single crystals grown by the solid state crystal growth 固相生长法生长Mn掺杂PZT-5H单晶的平衡性能

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-03 DOI: 10.1016/j.ceramint.2025.12.520

Honghui Wang, Pengcheng Zhang

Design of piezoelectric materials with high piezoelectric constant and mechanical quality factor for the high-powder resonant piezoelectric device applications is still challenging. Herein, a dual strategy integrating co-doping and single crystallization was utilized to balance the properties. A series of Mn doped PZT-5H single crystals were grown by the solid state crystal growth (SSCG) method. The microstructure, phase structure and dielectric/piezoelectric properties are systematically investigated for the SSCG-grown Mn doped PZT-5H single crystals. The balanced properties were obtained with piezoelectric constant d₃₃ of 610 pC/N, mechanical quality factor Q_m of about 450 and Curie temperature T_C of up to about 231 °C in SSCG-grown 2 wt% MnO₂ doped PZT-5H single crystals. In addition, the defect chemistry was discussed according to the complex impedance spectroscopy. This study opens up the possibility for the design of high-power piezoelectric materials through growth of co-doped single crystals by SSCG method.

为高粉谐振压电器件设计具有高压电常数和机械品质因数的压电材料仍然是一个挑战。本文采用了共掺杂和单晶化的双重策略来平衡性能。采用固态晶体生长（SSCG）法制备了一系列Mn掺杂PZT-5H单晶。系统地研究了sscg生长的Mn掺杂PZT-5H单晶的微观结构、相结构和介电/压电性能。在sscg生长的2 wt% MnO2掺杂PZT-5H单晶中，压电常数d33为610 pC/N，机械品质因子Qm约为450，居里温度TC高达约231℃，获得了平衡的性能。此外，利用复阻抗谱对缺陷的化学性质进行了讨论。本研究为SSCG法生长共掺杂单晶设计高功率压电材料开辟了可能性。

引用次数: 0

Sintering assisted controlled defect engineering in evolution of optical and dielectric performance of nano-ceria 烧结辅助控制缺陷工程在纳米二氧化铈的光学和介电性能的演变

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-03 DOI: 10.1016/j.ceramint.2025.12.488

Anshu Singh , Akanksha Malik , Richa Saini , Aman Kumar , Kriti Kriti , Pawan Kumar , Asokan Kandasami

This investigation focuses on the sintering-mediated effects on nano-ceria and its significant impact on its functional properties. The structural evolution of these nano-ceria samples confirms the fluorite cubic phase. However, additional super lattice reflection planes in X-ray diffraction (XRD) spectra indicate the presence of a distorted ceria lattice at higher sintering temperatures. For further confirmation of phase stability, Rietveld refinement analysis is accomplished for these sintering-assisted nano-ceria samples. Moreover, crystallography mediated electron density mapping reveals a stronger ionic bonding character in ceria at higher sintering temperatures. In addition, scanning electron microscopy (SEM) images demonstrate the formation of larger grains at higher sintering temperatures, which reduces the grain boundary density and improves polarization response. The absorbance edge of these samples decreases with the sintering temperatures. This reduction in optical band gap arises from the interplay between improved crystallinity, oxygen vacancies, and porosity-induced defect states. Furthermore, dielectric analysis demonstrates that the dielectric constant increased with sintering temperature. Enhancement in dielectric performance of these sintered samples is primarily driven by the creation of oxygen vacancies, reduction in grain boundary effects, and the contribution of interfacial polarization due to porosity. Multiple polarization mechanisms contribute to high dielectric performance over a wide frequency range. However, in correlation with ab initio calculations, the density of states (DOS) suggests alteration of O 2p-Ce 5 d hybridization and hence defects mediated modified electronic properties. It makes these sintered nano-ceria suitable candidates for high-frequency dielectric devices.

研究了烧结对纳米二氧化铈的影响及其对其功能性能的影响。这些纳米二氧化铈样品的结构演变证实了萤石立方相。然而，x射线衍射（XRD）光谱中附加的超晶格反射面表明，在较高的烧结温度下存在扭曲的二氧化铈晶格。为了进一步确认相稳定性，对这些烧结辅助纳米二氧化铈样品进行了Rietveld细化分析。此外，晶体学介导的电子密度映射显示，在较高的烧结温度下，二氧化铈具有更强的离子键特性。此外，扫描电镜（SEM）图像显示，在较高的烧结温度下形成了更大的晶粒，这降低了晶界密度，提高了极化响应。样品的吸光度边随烧结温度的升高而减小。这种光学带隙的减小是由于结晶度、氧空位和孔隙诱导缺陷态之间的相互作用。此外，介质分析表明，介质常数随烧结温度的升高而增大。这些烧结样品的介电性能的增强主要是由氧空位的产生、晶界效应的减少以及孔隙率引起的界面极化的贡献所驱动的。多种极化机制有助于在宽频率范围内实现高介电性能。然而，与从头计算相关，态密度（DOS）表明o2p - ce5d杂化改变，因此缺陷介导了电子性质的改变。这使得这些烧结的纳米二氧化铈成为高频介电器件的合适人选。

{"title":"Sintering assisted controlled defect engineering in evolution of optical and dielectric performance of nano-ceria","authors":"Anshu Singh , Akanksha Malik , Richa Saini , Aman Kumar , Kriti Kriti , Pawan Kumar , Asokan Kandasami","doi":"10.1016/j.ceramint.2025.12.488","DOIUrl":"10.1016/j.ceramint.2025.12.488","url":null,"abstract":"<div><div>This investigation focuses on the sintering-mediated effects on nano-ceria and its significant impact on its functional properties. The structural evolution of these nano-ceria samples confirms the fluorite cubic phase. However, additional super lattice reflection planes in X-ray diffraction (XRD) spectra indicate the presence of a distorted ceria lattice at higher sintering temperatures. For further confirmation of phase stability, Rietveld refinement analysis is accomplished for these sintering-assisted nano-ceria samples. Moreover, crystallography mediated electron density mapping reveals a stronger ionic bonding character in ceria at higher sintering temperatures. In addition, scanning electron microscopy (SEM) images demonstrate the formation of larger grains at higher sintering temperatures, which reduces the grain boundary density and improves polarization response. The absorbance edge of these samples decreases with the sintering temperatures. This reduction in optical band gap arises from the interplay between improved crystallinity, oxygen vacancies, and porosity-induced defect states. Furthermore, dielectric analysis demonstrates that the dielectric constant increased with sintering temperature. Enhancement in dielectric performance of these sintered samples is primarily driven by the creation of oxygen vacancies, reduction in grain boundary effects, and the contribution of interfacial polarization due to porosity. Multiple polarization mechanisms contribute to high dielectric performance over a wide frequency range. However, in correlation with ab initio calculations, the density of states (DOS) suggests alteration of O 2p-Ce 5 d hybridization and hence defects mediated modified electronic properties. It makes these sintered nano-ceria suitable candidates for high-frequency dielectric devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 6","pages":"Pages 7468-7481"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147412104","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

Fabrication and oxy-acetylene ablation behavior of Cf/TaC composites from an unsaturated TaC precursor 不饱和TaC前驱体Cf/TaC复合材料的制备及其氧乙炔烧蚀行为

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.2026.01.066

Honglei Wang, Chuhan Sun, Xingui Zhou, Jinshan Yu

Tantalum carbide (TaC) matrix composites are widely used in aerospace thermal protection systems due to their high melting point and excellent thermal shock resistance. In the precursor infiltration and pyrolysis (PIP) process, the TaC precursor plays a critical role in the fabrication of the composites. However, conventional tantalum alkoxide precursors often suffer from insufficient crosslinking sites and lack of molecular-level mixing between the Ta and C sources. To address these issues, this study synthesized an unsaturated TaC precursor using tantalum pentachloride (TaCl₅) and 3-buten-1-ol as reactants, with allyl novolac resin (AN) introduced as the carbon source. The C=C bonds in the structure acted as active crosslinking centers during copolymerization, leading to the formation of a densely cross-linked network in the PTC-Butene precursor. Using PTC-Butene solution as the precursor and 30 vol% carbon fiber felt as the reinforcement, C_f/TaC composites were successfully fabricated by PIP process. The composites were subjected to oxyacetylene ablation tests for 10, 60 and 120 s, and the ablation mechanisms were systematically investigated. Results show that during ablation, a molten Ta₂O₅ layer formed on the surface, which acted as a barrier against oxygen diffusion. However, this oxide layer was continuously eroded by the high-speed gas flow. Carbon fibers helped alleviate thermal stress and suppress matrix cracking, yet inherent pores within the composites and channels left after fiber oxidation provided pathways for oxygen infiltration.

碳化钽（TaC）基复合材料因其高熔点和优异的抗热震性能而广泛应用于航空航天热防护系统。在前驱体渗透热解（PIP）过程中，TaC前驱体对复合材料的制备起着至关重要的作用。然而，传统的醇化钽前体往往存在交联位点不足和Ta和C源之间缺乏分子水平混合的问题。为了解决这些问题，本研究以五氯化钽（TaCl5）和3-丁烯-1-醇为反应物，以烯丙基新型树脂（an）为碳源，合成了一种不饱和TaC前驱体。结构中的C=C键在共聚过程中充当了活跃的交联中心，导致ptc -丁烯前驱体形成了密集的交联网络。以ptc -丁烯溶液为前驱体，以30%体积的碳纤维毡为增强剂，采用PIP法制备了Cf/TaC复合材料。对复合材料进行了10、60和120 s的氧乙炔烧蚀试验，并对烧蚀机理进行了系统的研究。结果表明，在烧蚀过程中，表面形成了一层熔融的Ta2O5层，起到了阻挡氧扩散的屏障作用。然而，该氧化层不断受到高速气流的侵蚀。碳纤维有助于缓解热应力和抑制基体开裂，但复合材料内部固有的孔隙和纤维氧化后留下的通道为氧气渗透提供了途径。

{"title":"Fabrication and oxy-acetylene ablation behavior of Cf/TaC composites from an unsaturated TaC precursor","authors":"Honglei Wang, Chuhan Sun, Xingui Zhou, Jinshan Yu","doi":"10.1016/j.ceramint.2026.01.066","DOIUrl":"10.1016/j.ceramint.2026.01.066","url":null,"abstract":"<div><div>Tantalum carbide (TaC) matrix composites are widely used in aerospace thermal protection systems due to their high melting point and excellent thermal shock resistance. In the precursor infiltration and pyrolysis (PIP) process, the TaC precursor plays a critical role in the fabrication of the composites. However, conventional tantalum alkoxide precursors often suffer from insufficient crosslinking sites and lack of molecular-level mixing between the Ta and C sources. To address these issues, this study synthesized an unsaturated TaC precursor using tantalum pentachloride (TaCl<sub>5</sub>) and 3-buten-1-ol as reactants, with allyl novolac resin (AN) introduced as the carbon source. The C=C bonds in the structure acted as active crosslinking centers during copolymerization, leading to the formation of a densely cross-linked network in the PTC-Butene precursor. Using PTC-Butene solution as the precursor and 30 vol% carbon fiber felt as the reinforcement, C<sub>f</sub>/TaC composites were successfully fabricated by PIP process. The composites were subjected to oxyacetylene ablation tests for 10, 60 and 120 s, and the ablation mechanisms were systematically investigated. Results show that during ablation, a molten Ta<sub>2</sub>O<sub>5</sub> layer formed on the surface, which acted as a barrier against oxygen diffusion. However, this oxide layer was continuously eroded by the high-speed gas flow. Carbon fibers helped alleviate thermal stress and suppress matrix cracking, yet inherent pores within the composites and channels left after fiber oxidation provided pathways for oxygen infiltration.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 7","pages":"Pages 8691-8705"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147412456","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

Microstructure, dielectric behavior, and antibacterial activity of Cu-, Zn-, and Mn-modified NaTaO3 ceramics for multifunctional applications Cu, Zn， mn改性NaTaO3陶瓷的显微结构，介电性能和抗菌性能

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.ceramint.2026.01.101

Bharti Mohan , Nancy Jangra , Gita Rani , Rachna Ahlawat

The structural, dielectric, and antibacterial properties of pure and divalent transition metal (Cu/Zn/Mn) modified NaTaO₃ ceramics were investigated after synthesizing via a hydrothermal approach without any post-sintering. Various complementary techniques were employed to characterize the samples. Structural analysis verified the evolution of an orthorhombic perovskite phase with dopant-induced lattice distortions. UV–Vis absorption analysis revealed the strong absorption in the ultraviolet region, and Tauc plot evaluation yielded a wide optical band gap energy (3.95–4.15 eV). The Mn-modified NaTaO₃ sample has the best dielectric response, and further noticed that the transition metal ions have greatly modified the dielectric loss and AC conductivity. According to antibacterial assessments, Cu-modified NaTaO₃ has better antimicrobial action against Streptococcus pneumoniae owing to the release of Cu²⁺ ions and the formation of reactive oxygen species. These results suggest the possibilities of multifunctional NaTaO₃-based materials for integrating into antimicrobial coatings and next-generation dielectric devices.

采用水热法合成了纯二价过渡金属（Cu/Zn/Mn）修饰的NaTaO3陶瓷，研究了其结构、介电性能和抗菌性能。采用各种互补技术对样品进行表征。结构分析证实了掺杂引起晶格畸变的正交钙钛矿相的演化。紫外-可见吸收分析表明，该材料在紫外区有较强的吸收，Tauc图评价结果显示该材料具有较宽的带隙能（3.95 ~ 4.15 eV）。mn修饰的NaTaO3样品具有最好的介电响应，并且进一步注意到过渡金属离子对介电损耗和交流电导率有很大的改善。抗菌评价表明，cu修饰的NaTaO3由于释放Cu2+离子和形成活性氧，对肺炎链球菌具有较好的抗菌作用。这些结果表明了多功能natao3基材料集成到抗菌涂层和下一代介电器件中的可能性。

{"title":"Microstructure, dielectric behavior, and antibacterial activity of Cu-, Zn-, and Mn-modified NaTaO3 ceramics for multifunctional applications","authors":"Bharti Mohan , Nancy Jangra , Gita Rani , Rachna Ahlawat","doi":"10.1016/j.ceramint.2026.01.101","DOIUrl":"10.1016/j.ceramint.2026.01.101","url":null,"abstract":"<div><div>The structural, dielectric, and antibacterial properties of pure and divalent transition metal (Cu/Zn/Mn) modified NaTaO<sub>3</sub> ceramics were investigated after synthesizing via a hydrothermal approach without any post-sintering. Various complementary techniques were employed to characterize the samples. Structural analysis verified the evolution of an orthorhombic perovskite phase with dopant-induced lattice distortions. UV–Vis absorption analysis revealed the strong absorption in the ultraviolet region, and Tauc plot evaluation yielded a wide optical band gap energy (3.95–4.15 eV). The Mn-modified NaTaO<sub>3</sub> sample has the best dielectric response, and further noticed that the transition metal ions have greatly modified the dielectric loss and AC conductivity. According to antibacterial assessments, Cu-modified NaTaO<sub>3</sub> has better antimicrobial action against <em>Streptococcus pneumoniae</em> owing to the release of Cu<sup>2+</sup> ions and the formation of reactive oxygen species. These results suggest the possibilities of multifunctional NaTaO<sub>3</sub>-based materials for integrating into antimicrobial coatings and next-generation dielectric devices.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 7","pages":"Pages 9051-9064"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147413115","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

The influence of different numbers of fiber cloth layers on permeation during BN deposition process BN沉积过程中不同纤维布层数对渗透性能的影响

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.2026.01.111

Xiaoxu Lv, Jiajia Sun, Wei Liu, Hu Liu, Jinhua Yang, Jian Jiao

In this paper, the effect of varying the number of layers (2, 4, 8 and 16) on the formation of the boron nitride (BN) interphase deposited on the two-dimensional woven silicon carbide (SiC) fiber cloth by chemical vapor infiltration (CVI) was systematically studied. In the deposition process, boron trichloride (BCl₃) and ammonia (NH₃) were used as precursor gases, and the deposition was carried out under specific temperature, pressure and gas flow ratio. The results show that the increase of the number of fiber cloth layers significantly changes the transport and diffusion kinetics of reactive gas in the stacking structure, and then has an obvious impact on the deposition uniformity, crystallinity, micro-morphology and deposition rate of BN. When the number of layers is small (2 and 4 layers), the gas transport is efficient and the BN interphase with strong fiber adhesion is uniform and dense. When the number of layers increases to 8 layers, the diffusion limitations become apparent, and the gradient distribution of deposition thickness and crystallinity appears in the interlayer area; When the number of layers reaches 16 layers, the severe mass transfer limitation leads to excessive deposition or even pore blockage of the outer fibers, while the deposition of the inner fibers is very small due to reactant depletion and byproduct accumulation, resulting in pronounced structural inhomogeneity.

本文系统研究了化学气相渗透（CVI）法制备二维编织碳化硅（SiC）纤维布时，不同层数（2、4、8、16）对氮化硼（BN）界面相形成的影响。在沉积过程中，以三氯化硼（BCl3）和氨（NH3）为前驱气体，在特定的温度、压力和气体流量比下进行沉积。结果表明：纤维布层数的增加显著改变了堆积结构中反应气体的输运和扩散动力学，进而对BN的沉积均匀性、结晶度、微观形貌和沉积速率产生明显影响。当层数较少时（2层和4层），气体输运效率高，纤维附着力强的BN界面相均匀致密。当层数增加到8层时，扩散限制变得明显，层间区域出现沉积厚度和结晶度的梯度分布；当层数达到16层时，严重的传质限制导致外层纤维过度沉积甚至孔隙堵塞，而内层纤维由于反应物耗损和副产物积累而沉积极少，导致结构不均匀性明显。

{"title":"The influence of different numbers of fiber cloth layers on permeation during BN deposition process","authors":"Xiaoxu Lv, Jiajia Sun, Wei Liu, Hu Liu, Jinhua Yang, Jian Jiao","doi":"10.1016/j.ceramint.2026.01.111","DOIUrl":"10.1016/j.ceramint.2026.01.111","url":null,"abstract":"<div><div>In this paper, the effect of varying the number of layers (2, 4, 8 and 16) on the formation of the boron nitride (BN) interphase deposited on the two-dimensional woven silicon carbide (SiC) fiber cloth by chemical vapor infiltration (CVI) was systematically studied. In the deposition process, boron trichloride (BCl<sub>3</sub>) and ammonia (NH<sub>3</sub>) were used as precursor gases, and the deposition was carried out under specific temperature, pressure and gas flow ratio. The results show that the increase of the number of fiber cloth layers significantly changes the transport and diffusion kinetics of reactive gas in the stacking structure, and then has an obvious impact on the deposition uniformity, crystallinity, micro-morphology and deposition rate of BN. When the number of layers is small (2 and 4 layers), the gas transport is efficient and the BN interphase with strong fiber adhesion is uniform and dense. When the number of layers increases to 8 layers, the diffusion limitations become apparent, and the gradient distribution of deposition thickness and crystallinity appears in the interlayer area; When the number of layers reaches 16 layers, the severe mass transfer limitation leads to excessive deposition or even pore blockage of the outer fibers, while the deposition of the inner fibers is very small due to reactant depletion and byproduct accumulation, resulting in pronounced structural inhomogeneity.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 7","pages":"Pages 9169-9176"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147413248","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

In-situ formation of ZrO2 interfacial layer between the aggregate and matrix and its effect on thermal shock resistance of corundum-spinel castables 集料与基体之间ZrO2界面层的原位形成及其对刚玉尖晶石浇注料抗热震性能的影响

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

Ceramics International

Pub Date : 2026-03-01 Epub Date: 2026-01-19 DOI: 10.1016/j.ceramint.2026.01.179

Endong Jin, Bohai Zhang, Yuan Feng, Donghai Ding, Guoqing Xiao, Xing Hou

To improve the thermal shock resistance of corundum-spinel castables, the ZrO₂ layer were in situ formed between the aggregate and matrix. The influence of layer thickness, distribution, and phase composition on the physical and mechanical properties, thermal shock resistance, and microstructure of the castables were systematically studied. Optimal layer coverage was attained with a precursor solution containing 1 wt% polyvinyl alcohol and 0.5 mol L⁻¹ zirconyl chloride octahydrate. Under these conditions, the ZrO₂ layers displayed a uniform thickness of approximately 4 μm with the highest degree of continuity. Furthermore, the residual strength ratio of the corundum-spinel castables was enhanced by 11.79 % with the use of zirconia-coated corundum aggregates compared with the blank samples. Under thermal stress, the microcracks propagated toward the interface between the corundum aggregate and the matrix. It was blocked by the zirconia layer and deflected. This can protect the corundum aggregate from being penetrated by the crack, thereby enhancing the thermal shock resistance of the corundum-spinel castables.

为提高刚玉尖晶石浇注料的抗热震性，在骨料与基体之间原位形成ZrO2层。系统研究了浇注料的层厚、分布和相组成对浇注料的物理力学性能、抗热震性和显微组织的影响。用含有1 wt%聚乙烯醇和0.5 mol L−1八水合氯化锆的前驱体溶液获得最佳的层覆盖率。在此条件下，ZrO2层厚度均匀，厚度约为4 μm，具有最高的连续性。与空白浇注料相比，氧化锆刚玉骨料的残余强度比提高了11.79%。在热应力作用下，微裂纹向刚玉骨料与基体界面方向扩展。它被氧化锆层阻挡而偏转。这样可以保护刚玉骨料不被裂纹渗透，从而提高刚玉尖晶石浇注料的抗热震性。

{"title":"In-situ formation of ZrO2 interfacial layer between the aggregate and matrix and its effect on thermal shock resistance of corundum-spinel castables","authors":"Endong Jin, Bohai Zhang, Yuan Feng, Donghai Ding, Guoqing Xiao, Xing Hou","doi":"10.1016/j.ceramint.2026.01.179","DOIUrl":"10.1016/j.ceramint.2026.01.179","url":null,"abstract":"<div><div>To improve the thermal shock resistance of corundum-spinel castables, the ZrO<sub>2</sub> layer were in situ formed between the aggregate and matrix. The influence of layer thickness, distribution, and phase composition on the physical and mechanical properties, thermal shock resistance, and microstructure of the castables were systematically studied. Optimal layer coverage was attained with a precursor solution containing 1 wt% polyvinyl alcohol and 0.5 mol L<sup>−1</sup> zirconyl chloride octahydrate. Under these conditions, the ZrO<sub>2</sub> layers displayed a uniform thickness of approximately 4 μm with the highest degree of continuity. Furthermore, the residual strength ratio of the corundum-spinel castables was enhanced by 11.79 % with the use of zirconia-coated corundum aggregates compared with the blank samples. Under thermal stress, the microcracks propagated toward the interface between the corundum aggregate and the matrix. It was blocked by the zirconia layer and deflected. This can protect the corundum aggregate from being penetrated by the crack, thereby enhancing the thermal shock resistance of the corundum-spinel castables.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"52 8","pages":"Pages 10038-10046"},"PeriodicalIF":5.6,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147419879","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