Journal of The European Ceramic Society最新文献_第10页

Solid-state synthesis of stoichiometric and dense CoV2O4 targets

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-14 DOI: 10.1016/j.jeurceramsoc.2025.117286

Lamiae El Khabchi, Antonio Peña Corredor, François Roulland, Marc Lenertz, Cédric Leuvrey, Jérôme Robert, Gilles Versini, Laurent Schlur, Christophe Lefèvre, Nathalie Viart

{"title":"Solid-state synthesis of stoichiometric and dense CoV2O4 targets","authors":"Lamiae El Khabchi, Antonio Peña Corredor, François Roulland, Marc Lenertz, Cédric Leuvrey, Jérôme Robert, Gilles Versini, Laurent Schlur, Christophe Lefèvre, Nathalie Viart","doi":"10.1016/j.jeurceramsoc.2025.117286","DOIUrl":"10.1016/j.jeurceramsoc.2025.117286","url":null,"abstract":"<div><div>The CoV2O4 (CVO) spinel is a magnetically frustrated compound for which thin films, with their associated substrate-induced strains, can bring challenging new magnetic structures. Research on CVO thin films remains scarce to date, probably hindered by the complex synthesis of CVO stoichiometric targets necessary for their deposition. The difficulty to have V in its +III valence is a serious challenge. We present here a solid-state method for the production of polycrystalline stoichiometric single-phased and dense pellets of CVO. The procedure involves controlling the heat treatment atmospheres to ensure single-phased CoV2O4 powder and homogenising grains size by attrition to promote dense pellet sintering. The significant density of the prepared pellets allows their use as targets for the growth of thin films by techniques such as pulsed laser deposition (PLD) or sputtering and opens the way to alternative thin films depositions.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117286"},"PeriodicalIF":5.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimized configuration entropy for synergistic enhancement of thermoelectric performance for SrTiO3-based ceramics

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-14 DOI: 10.1016/j.jeurceramsoc.2025.117290

Peng Cao , Jie Yao , Yuqing Sun , Andrei I. Klyndyuk , Zhihao Li , Adeel Abbas , Natalie S. Krasutskaya , Wenbin Su , Chunlei Wang , Hongchao Wang

{"title":"Optimized configuration entropy for synergistic enhancement of thermoelectric performance for SrTiO3-based ceramics","authors":"Peng Cao , Jie Yao , Yuqing Sun , Andrei I. Klyndyuk , Zhihao Li , Adeel Abbas , Natalie S. Krasutskaya , Wenbin Su , Chunlei Wang , Hongchao Wang","doi":"10.1016/j.jeurceramsoc.2025.117290","DOIUrl":"10.1016/j.jeurceramsoc.2025.117290","url":null,"abstract":"<div><div>High-entropy design has proven effective for optimizing thermoelectric properties, particularly thermal conductivity. However, only appropriate configuration entropy can synergistically enhance thermoelectric performance. Here, La, Nd, Dy and Y are used to modulate configuration entropy of SrTiO3-based ceramics. Thermodynamic evaluations suggest that (Sr1–4xLaxNdxDyxYx)TiO3 components, with configuration entropy from 1.05 to 4.43 J mol−1 K−1, can form single-phase cubic structures. High electrical conductivity and Seebeck coefficient result in power factor of 1213 μW K−2 m−1 at 473 K, exceeding 3 times higher than typical high-entropy ceramics. Point defects, mainly inducing stress field fluctuations, cause lattice thermal conductivity of 3.0 W m−1 K−1 at 973 K, rivalling that of high-entropy ceramics. Ultimately, maximum zT value of 0.2 (x = 0.02, 0.025, 0.03) at high-temperatures surpasses most high-entropy ceramics. Hence, configuration entropy from 3.24 to 4.43 J mol−1 K−1 is more conducive for synergistically optimizing electro-thermal transport properties and enhancing zT in (Sr1–4xLaxNdxDyxYx)TiO3 ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117290"},"PeriodicalIF":5.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429221","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

High-temperature properties and microstructure evolution of C/C-ZrC-SiC composites fabricated by reactive melt infiltration

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-14 DOI: 10.1016/j.jeurceramsoc.2025.117288

Chongqing Xu , Chenglan Jia, Zheng Peng, Sian Chen

引用次数: 0

Unlocking the superior performance of Ni-rich layered materials through precise precursor engineering

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-14 DOI: 10.1016/j.jeurceramsoc.2025.117280

Eunki Kim , Yong Ha Cho , Jun Ho Shin , Hye Ji Eun , Hye In Song , Sang-Hak Lee , Jungdon Suk , San Moon

{"title":"Unlocking the superior performance of Ni-rich layered materials through precise precursor engineering","authors":"Eunki Kim , Yong Ha Cho , Jun Ho Shin , Hye Ji Eun , Hye In Song , Sang-Hak Lee , Jungdon Suk , San Moon","doi":"10.1016/j.jeurceramsoc.2025.117280","DOIUrl":"10.1016/j.jeurceramsoc.2025.117280","url":null,"abstract":"<div><div>In this study, we investigated the influence of precursor engineering on the performances of Ni-rich cathode for LIBs. By systematically varying the NH₄OH to metal ratio during co-precipitation process, we controlled the porosity of precursors, affecting the microstructure of the calcined materials. SEM, BET, and true density analyses revealed that lower NH₄OH/Me ratios produce more porous precursors, which enhance Li-source diffusion and promote uniform sintering. XRD and residual lithium analyses confirmed reduced primary particle and lower residual lithium in the calcined materials, leading to improved rate capability and cyclability. Specifically, cathodes derived from low-density precursors showed a 30 % increase in discharge capacity at 3 C and fewer internal cracks after 50 cycles compared to high-density samples. Mechanical tests indicated that high-density materials exhibited a 250 % increase in fracture toughness. These findings highlight the crucial role of precursor design in optimizing Ni-rich cathodes and offer a straightforward strategy for assessing precursor quality.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117280"},"PeriodicalIF":5.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved oxidation resistance of CVD-SiC coating at 1300 ℃ by Ti addition

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-14 DOI: 10.1016/j.jeurceramsoc.2025.117289

Bing Liu , Lingxiang Guo , Huilun Shi , Yi Zhang , Xuemin Yin , Jia Sun , Qiangang Fu

引用次数: 0

Internal stress optimization enhancing the properties of KNN-based Ni-internal-electrode multilayer piezoelectric actuators

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-13 DOI: 10.1016/j.jeurceramsoc.2025.117283

Zhihao Dong , Peiyao Zhao , Xiao Ma , Xiaohui Wang , Jian Jiao

{"title":"Internal stress optimization enhancing the properties of KNN-based Ni-internal-electrode multilayer piezoelectric actuators","authors":"Zhihao Dong , Peiyao Zhao , Xiao Ma , Xiaohui Wang , Jian Jiao","doi":"10.1016/j.jeurceramsoc.2025.117283","DOIUrl":"10.1016/j.jeurceramsoc.2025.117283","url":null,"abstract":"<div><div>The KNN-based Ni-internal-electrode multilayer piezoelectric actuators (MLAs) possess the advantages of environmental friendliness and low cost. However, the internal stresses in MLAs suppress the performance of ceramic materials and should be optimized for improving the comprehensive performances of MLAs. This study alleviated the generation of internal stresses in MLAs by modifying the electrode pastes and designing the shapes of the internal electrodes, increasing the inverse piezoelectric coefficient d33* to 450 pm/V. The temperature stability of MLAs is significantly improved compared to the bulk ceramics, indicating that the internal stresses can also play a positive role in MLAs. In addition, the MLAs experience only a 4.7 % decrease in d33* over 5 million fatigue cycles due to the possible delayed propagation of fatigue cracks. The improvement of material properties and the solution to application problems should complement each other, jointly promoting the practicality of lead-free piezoceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117283"},"PeriodicalIF":5.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420740","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

Low-temperature dielectric relaxation and microwave-terahertz dielectric response of Ca-Sm-Ti-O perovskite ceramics

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-13 DOI: 10.1016/j.jeurceramsoc.2025.117287

Weijia Guo, Yutian Lu, Chongyang Zhang, Zhenxing Yue

{"title":"Low-temperature dielectric relaxation and microwave-terahertz dielectric response of Ca-Sm-Ti-O perovskite ceramics","authors":"Weijia Guo, Yutian Lu, Chongyang Zhang, Zhenxing Yue","doi":"10.1016/j.jeurceramsoc.2025.117287","DOIUrl":"10.1016/j.jeurceramsoc.2025.117287","url":null,"abstract":"<div><div>Low-loss (high-Q×f, where Q = 1/tan δ) dielectric ceramics can help achieve efficient microwave signal transmission and reduce heat generation. In the traditional Ca-Ln-Ti-O perovskite system (where Ln = rare earth) with the general formula of Ca1–xLn2x/3TiO3 (CSTx), the sharp decline in the Q×f value when x > 0.5 remains unexplained, posing a challenge for designing low-loss ceramics. In this study, CSTx ceramics (x ≤ 0.7) are synthesized via the solid-state reaction method, with a focus on their structure, defects, and broadband dielectric properties. A significant discrepancy between the Q×f values in the microwave and terahertz bands is found when x ≥ 0.6, suggesting the presence of additional loss mechanisms in the microwave band beyond ion displacement depolarization. Meanwhile, the low-frequency dielectric spectra show a weak dielectric relaxation in the low-temperature region, attributed to the partially ordered A-site vacancies. Therefore, this relaxation can act on the microwave frequency band at room temperature, resulting in a sharp decline in Q×f values. Such low-frequency and low-temperature dielectric relaxation should not be ignored in the research of microwave dielectric ceramics. These findings provide a crucial theoretical reference for developing low-loss microwave dielectric ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117287"},"PeriodicalIF":5.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420736","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

Preparation, microstructure and properties of C/Ta4HfC5-SiC composite fabricated by PIP method based on a new liquid precursor

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-13 DOI: 10.1016/j.jeurceramsoc.2025.117281

Fan Wan , Haolin Ma , Lin Zhang , Maofen He , Yurong Chen , Xuemei Li , Changqing Song , Junsheng Li

{"title":"Preparation, microstructure and properties of C/Ta4HfC5-SiC composite fabricated by PIP method based on a new liquid precursor","authors":"Fan Wan , Haolin Ma , Lin Zhang , Maofen He , Yurong Chen , Xuemei Li , Changqing Song , Junsheng Li","doi":"10.1016/j.jeurceramsoc.2025.117281","DOIUrl":"10.1016/j.jeurceramsoc.2025.117281","url":null,"abstract":"<div><div>A novel liquid Ta4HfC5 precursor was produced by modified citric acid complexation method and C/Ta4HfC5-SiC composite was manufactured by precursor impregnation and pyrolysis (PIP) process. The powder obtained after 1800 ℃ heat treatment of the precursor has a diameter range of 50–300 nm, with a median diameter of ∼110 nm. The density and porosity of C/Ta4HfC5-SiC composite are 2.43 g/cm3 and 13.2 %, respectively. Due to the toughening of fibers and the addition of SiC, the overall integrity of C/Ta4HfC5-SiC is improved, achieving high bending strength and fracture toughness of 392.6 MPa and 10.4 MPa·m1/2, respectively. After oxyacetylene ablation assessment of 60 s, the measured mass ablation rate and linear ablation rate of the composite were 11.6 mg/s and 9.1 µm/s, respectively. A complete oxide layer based on the joint effort of oxides of Ta(Hf) and Si was formed on the surface of the composite, with no exposed fibers observed.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117281"},"PeriodicalIF":5.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420738","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 energy storage performance of lead-free silver niobate antiferroelectric ceramics through Yb modification

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-13 DOI: 10.1016/j.jeurceramsoc.2025.117282

Yajie Hu , Jinhua Du , Ye Zhao , Chunxiao Lu , Yong Li , Xiucai Wang , Xihong Hao

{"title":"Enhanced energy storage performance of lead-free silver niobate antiferroelectric ceramics through Yb modification","authors":"Yajie Hu , Jinhua Du , Ye Zhao , Chunxiao Lu , Yong Li , Xiucai Wang , Xihong Hao","doi":"10.1016/j.jeurceramsoc.2025.117282","DOIUrl":"10.1016/j.jeurceramsoc.2025.117282","url":null,"abstract":"<div><div>AgNbO₃ antiferroelectric (AFE) materials have attracted increasing attention owing to their environmental benefits, large polarization and double hysteresis loop, but they are limited by low breakdown strength and large hysteresis. In this study, the Ag(1–3x)YbxNbO3 ultrafine powder was prepared by hydrothermal process, and the ceramics were sintered in ambient air without a specialized oxygen atmosphere. An impressive recoverable energy density of 3.7 J/cm3 was achieved in Ag₀.₉₄Yb₀.₀₂NbO₃, attributed to enhanced AFE stability. Furthermore, the ceramics exhibited remarkable frequency and temperature stability, with energy density variations of less than 10 % over the 1–100 Hz frequency range and less than 15 % between room temperature and 110°C. An ultrafast discharge process was observed, with 90 % of stored energy being released within 205 ns, demonstrating suitability for advanced high-power device applications. These findings indicate that Yb modification and the hydrothermal process offer a promising route for improving antiferroelectricity and achieving high energy storage performance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 8","pages":"Article 117282"},"PeriodicalIF":5.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403461","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

A review on the performance and lifetime improvement of thermal barrier coatings

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-02-13 DOI: 10.1016/j.jeurceramsoc.2025.117274

Arezoo Sezavar, Seyed Abdolkarim Sajjadi

引用次数: 0