Journal of The European Ceramic Society最新文献

筛选
英文 中文
Influence of SiC morphology and distribution on the ablation behavior of Ta0.8Hf0.2C-SiC coating for C/C composites SiC形貌及分布对Ta0.8Hf0.2C-SiC涂层烧蚀行为的影响
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-18 DOI: 10.1016/j.jeurceramsoc.2025.117834
Shaopu Liu , Yaxin Wang , Ping Gu , Zhuang Ma , Yanbo Liu , Xinchun Tian , Shizhen Zhu , Ling Liu
{"title":"Influence of SiC morphology and distribution on the ablation behavior of Ta0.8Hf0.2C-SiC coating for C/C composites","authors":"Shaopu Liu ,&nbsp;Yaxin Wang ,&nbsp;Ping Gu ,&nbsp;Zhuang Ma ,&nbsp;Yanbo Liu ,&nbsp;Xinchun Tian ,&nbsp;Shizhen Zhu ,&nbsp;Ling Liu","doi":"10.1016/j.jeurceramsoc.2025.117834","DOIUrl":"10.1016/j.jeurceramsoc.2025.117834","url":null,"abstract":"<div><div>To enhance the ablation resistance of carbon/carbon (C/C) composites under extreme thermal environments, Ta<sub>0.8</sub>Hf<sub>0.2</sub>C-SiC coatings were fabricated via pack cementation, with the morphology and distribution of SiC precisely tuned by adjusting the fabrication temperature. The influence of SiC characteristics on coating microstructure, oxide evolution, and ablation behavior was systematically investigated. Coatings with optimally sized (∼30–40 μm), well-dispersed SiC exhibited the highest spectral emissivity (2.5–3 μm), enabling efficient thermal radiation and surface temperature reduction. During oxyacetylene ablation at 2130 ℃ for 300 s, the optimized coating formed a dense, low-volatility Ta-Hf-Si-O oxide layer and achieved a near-zero linear ablation rate (0.103 μm/s). In contrast, coatings with underdeveloped or overgrown SiC led to porous structures, phase segregation, and inferior thermal protection. This study demonstrates the key role of SiC morphology in controlling oxide phase evolution and provides a promising strategy for the design of advanced carbide-based coatings for ultra-high-temperature aerospace applications.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117834"},"PeriodicalIF":6.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106060","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 Td and large d33 achieved in Bi0.5Na0.5TiO3-based ceramics designed by a novel 2–2-like hamburger structure 在bi0.5 na0.5 tio3基陶瓷中,采用一种新型的2- 2类汉堡包结构,实现了高Td和大d33
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-18 DOI: 10.1016/j.jeurceramsoc.2025.117836
Dongyan Yu , Yong Zhang , Junqi Chen , Chengfu Xu , Jinwu Chen , Changrong Zhou , Laijun Liu
{"title":"High Td and large d33 achieved in Bi0.5Na0.5TiO3-based ceramics designed by a novel 2–2-like hamburger structure","authors":"Dongyan Yu ,&nbsp;Yong Zhang ,&nbsp;Junqi Chen ,&nbsp;Chengfu Xu ,&nbsp;Jinwu Chen ,&nbsp;Changrong Zhou ,&nbsp;Laijun Liu","doi":"10.1016/j.jeurceramsoc.2025.117836","DOIUrl":"10.1016/j.jeurceramsoc.2025.117836","url":null,"abstract":"<div><div>There is an inherent trade-off between high piezoelectricity originated from structural instability and enhanced thermal stability derived from structural stability in Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub> (BNT)-based piezoelectric ceramics. As a result, it is a significant challenge for simultaneously achieving both large piezoelectric coefficient (<em>d</em><sub>33</sub>) and high depolarization temperature (<em>T</em><sub>d</sub>). Herein, by designing the 2–2 hamburger-structured composites with different Ba<sup>2 +</sup> concentration, a harmonious balance between depolarization temperature <em>T</em><sub>d</sub> (493 K) and piezoelectric coefficient <em>d</em><sub>33</sub> (124 pC/N) is obtained in BNT-based ceramic composites. The large <em>d</em><sub>33</sub> primarily originates from the coexistence of rhombohedral and tetragonal phases. The high <em>T</em><sub>d</sub> primarily benefits from the diffused ferroelectric-relaxor phase transition induced by the V-shaped Ba<sup>2+</sup> diffusion gradient, localized electric field related to pores and residual stress. Consequently, our proposed strategy provides a novel perspective to boost both <em>T</em><sub>d</sub> and <em>d</em><sub>33</sub> in BNT-based piezoceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 3","pages":"Article 117836"},"PeriodicalIF":6.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157267","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
Excellent energy storage performance of Bi0.5Na0.5TiO3-based lead-free relaxor ferroelectrics via isovalent high-entropy doping 通过等价高熵掺杂制备的bi0.5 na0.5 tio3基无铅弛豫铁电体具有优异的储能性能
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-18 DOI: 10.1016/j.jeurceramsoc.2025.117837
Jielin Zha , Yulong Yang , Xiaomei Lu , Xueli Hu , Zijing Wu , Min Zhou , Fengzhen Huang , Xuenong Ying , Jinsong Zhu
{"title":"Excellent energy storage performance of Bi0.5Na0.5TiO3-based lead-free relaxor ferroelectrics via isovalent high-entropy doping","authors":"Jielin Zha ,&nbsp;Yulong Yang ,&nbsp;Xiaomei Lu ,&nbsp;Xueli Hu ,&nbsp;Zijing Wu ,&nbsp;Min Zhou ,&nbsp;Fengzhen Huang ,&nbsp;Xuenong Ying ,&nbsp;Jinsong Zhu","doi":"10.1016/j.jeurceramsoc.2025.117837","DOIUrl":"10.1016/j.jeurceramsoc.2025.117837","url":null,"abstract":"<div><div>High-entropy strategy is acknowledged effective to improve energy storage performance of dielectric materials, yet the underlying mechanisms require further exploration. In this work, based on ferroelectric Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub> (BNT), we developed a series of (Bi<sub>0.25</sub>La<sub>0.25</sub>Na<sub>0.25</sub>K<sub>0.25</sub>)Ti<sub>1-<em>x</em></sub>Zr<sub><em>x</em></sub>O<sub>3</sub> (BLNKTZ, <em>x</em> = 0.0, 0.05, 0.10) ceramics with varying configuration entropy (<em>ΔS</em><sub>config</sub>), by introducing La/K and Zr with the same valence of Bi/Na and Ti, respectively. The high-entropy ceramic with <em>x</em> = 0.05 (<em>ΔS</em><sub>config</sub> = 1.58 R) demonstrated excellent energy storage performance, achieving a recoverable energy density (<em>W</em><sub>rec</sub>) of 6.6 J/cm<sup>3</sup> and efficiency (<em>η</em>) of 84 %. Additionally, the sample exhibited excellent temperature/frequency stability, fatigue resistance, high power density, high discharge density, and ultrafast charge-discharge speed. The proposed isovalent high-entropy doping strategy not only retains common advantages of high-entropy, i.e., multiphase polar nanoregions (PNRs) and ultrafine grains, but also improves lattice integrity and reduces oxygen vacancy concentration, thereby achieving high breakdown strength (<em>E</em><sub>b</sub>) and superior energy storage performance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117837"},"PeriodicalIF":6.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118099","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
Thermal erosion characteristics of vacuum hot-pressed NbC-modified ZrC ultra-high temperature ceramics ranging from 1500 to 2500 °C 1500 ~ 2500℃真空热压nbc改性ZrC超高温陶瓷的热侵蚀特性
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-18 DOI: 10.1016/j.jeurceramsoc.2025.117835
Ruixiang He, Kezhi Li, Mengyuan Chang
{"title":"Thermal erosion characteristics of vacuum hot-pressed NbC-modified ZrC ultra-high temperature ceramics ranging from 1500 to 2500 °C","authors":"Ruixiang He,&nbsp;Kezhi Li,&nbsp;Mengyuan Chang","doi":"10.1016/j.jeurceramsoc.2025.117835","DOIUrl":"10.1016/j.jeurceramsoc.2025.117835","url":null,"abstract":"<div><div>Static oxidation and oxyacetylene ablation tests were conducted on vacuum hot-pressed NbC-modified ZrC (Zr<sub>1-<em>x</em></sub>Nb<sub><em>x</em></sub>C) ultra-high temperature ceramics. For revealing the oxidation mechanism, the phase composition of heat-treated ZrO<sub>2</sub><img>Nb<sub>2</sub>O<sub>5</sub> ceramics in Ar was identified. The results demonstrated that the stable phases of the ZrO<sub>2</sub>-50 mol% NbO<sub>2.5</sub> ceramic heat-treated at 1700<img>1900 °C were Nb<sub>2</sub>Zr<sub>6</sub>O<sub>17</sub> and NbO<sub>2</sub>. The oxidation resistant temperature limit (T<sub><em>l</em></sub>) for Zr<sub>1-<em>x</em></sub>Nb<sub><em>x</em></sub>C was 1650 ˂ T<sub><em>l</em></sub> ˂ 1700 °C. At 1650 °C for 30 h, Zr<sub>0.7</sub>Nb<sub>0.3</sub>C formed a dense oxide film comprising bulky ZrO<sub>2</sub> bonded by lathy Nb<sub>2</sub>Zr<sub>6</sub>O<sub>17</sub>, exhibiting optimal oxidation resistance. Zr<sub>0.9</sub>Nb<sub>0.1</sub>C developed a dense “free-standing” single-phase ZrO<sub>2</sub> film at 4.2 MW/m<sup>2</sup> for 40 s × 6, achieving a modification effect on the ablation morphology of ZrC nearing 100%. Furthermore, the thermostability mechanism of ZrO<sub>2</sub> to Nb<sub>2</sub>O<sub>5</sub> and the formation mechanism of the “free-standing” structure were analysed.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117835"},"PeriodicalIF":6.2,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118719","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
Tailoring the absorption peaks for enhanced in-line transmittance of Y2O3–MgO composites 调整吸收峰以增强Y2O3-MgO复合材料的在线透射率
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-17 DOI: 10.1016/j.jeurceramsoc.2025.117833
Xincheng Cai , Junjing Duan , Zhangyi Huang , Lexing Liang , Zhenyu Zhang , Mao Deng , Jianqi Qi , Tiecheng Lu
{"title":"Tailoring the absorption peaks for enhanced in-line transmittance of Y2O3–MgO composites","authors":"Xincheng Cai ,&nbsp;Junjing Duan ,&nbsp;Zhangyi Huang ,&nbsp;Lexing Liang ,&nbsp;Zhenyu Zhang ,&nbsp;Mao Deng ,&nbsp;Jianqi Qi ,&nbsp;Tiecheng Lu","doi":"10.1016/j.jeurceramsoc.2025.117833","DOIUrl":"10.1016/j.jeurceramsoc.2025.117833","url":null,"abstract":"<div><div>Y<sub>2</sub>O<sub>3</sub><img>MgO composites have emerged as promising mid-infrared (MIR) materials owing to their exceptional broadband transmittance and remarkable thermal stability at elevated temperatures. Nevertheless, the presence of uncontrollable absorption bands within the 4–7 μm spectral range, compromises their optical performance in advanced MIR systems. To address this limitation, we systematically investigated annealing as a strategic approach for modulating defect chemistry in oxide composites. In this paper, the absorption peaks of Y<sub>2</sub>O<sub>3</sub><img>MgO composites were controlled by varying the annealing conditions. As the annealing temperature increases from 600 °C to 1100 °C, the absorption peaks of Y<sub>2</sub>O<sub>3</sub><img>MgO composites gradually shift from ∼4.9 μm to ∼6.8 μm, with a transition temperature ∼900°C. This behavior is attributed to the oxidation of metal-organic coordination (MOC) to CO<sub>3</sub><sup>2-</sup> in high-temperature air. Ultimately, Y<sub>2</sub>O<sub>3</sub><img>MgO composites featuring controllable absorption peaks were obtained, demonstrating a transmittance of ∼81 % at 7 μm - the highest value ever reported for this composite system, which broadens the potential application space, particularly in fields requiring mid-infrared transparency such as gas detection, materials characterization, and biomedical imaging. This study not only elucidates specific strategies for enhancing the performance and microstructure of Y<sub>2</sub>O<sub>3</sub><img>MgO composites but also furnishes reliable methodologies and datasets to support the annealing processes of other material systems.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117833"},"PeriodicalIF":6.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106058","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
Ge doping collaboratively optimizes the thermoelectric properties and stability of liquid Cu2Se Ge掺杂协同优化了液态Cu2Se的热电性能和稳定性
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-17 DOI: 10.1016/j.jeurceramsoc.2025.117820
Xueke Gu , Guangmeng You , Xinxin Wang , Yajing Wang , Yuli Yan , Gui Yang , Chengxiao Peng , Chao Wang
{"title":"Ge doping collaboratively optimizes the thermoelectric properties and stability of liquid Cu2Se","authors":"Xueke Gu ,&nbsp;Guangmeng You ,&nbsp;Xinxin Wang ,&nbsp;Yajing Wang ,&nbsp;Yuli Yan ,&nbsp;Gui Yang ,&nbsp;Chengxiao Peng ,&nbsp;Chao Wang","doi":"10.1016/j.jeurceramsoc.2025.117820","DOIUrl":"10.1016/j.jeurceramsoc.2025.117820","url":null,"abstract":"<div><div>Liquid Cu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Se thermoelectric materials hold significant potential due to their intrinsically low thermal conductivity. In this study, a series of Ge-doped Cu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Se samples were synthesized using mechanical alloying and spark plasma sintering techniques. The investigation focused on examining the effects of Ge doping on the thermoelectric performance and stability of Cu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Se. The introduction of Ge reduces Cu vacancies and promotes the formation of Cu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Se/Ge heterojunctions within the matrix. These heterojunctions act as filters for low-energy carriers, thereby optimizing carrier concentration. They also increase dislocation density, enhance phonon scattering, and reduce thermal conductivity. Furthermore, the Cu<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Se/Ge interface forms a Schottky barrier, preventing the long-range migration of Cu<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span> ions, which enhances the material’s stability. As a result, the ZT value reached 2.44 at 823 K, representing a 114% improvement. Furthermore, the nano-secondary phase and grain refinement have increased the compressive strength by four times, providing crucial support for equipment engineering.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117820"},"PeriodicalIF":6.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118091","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 scandium cations on the properties of YSAG:Sm3+ ceramics 钪离子对YSAG:Sm3+陶瓷性能的影响
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-16 DOI: 10.1016/j.jeurceramsoc.2025.117830
V.A. Lapin, A.A. Kravtsov, V.E. Suprunchuk, F.F. Malyavin, D.S. Vakalov, E.V. Medyanik, L.V. Tarala, V.A. Tarala
{"title":"The influence of scandium cations on the properties of YSAG:Sm3+ ceramics","authors":"V.A. Lapin,&nbsp;A.A. Kravtsov,&nbsp;V.E. Suprunchuk,&nbsp;F.F. Malyavin,&nbsp;D.S. Vakalov,&nbsp;E.V. Medyanik,&nbsp;L.V. Tarala,&nbsp;V.A. Tarala","doi":"10.1016/j.jeurceramsoc.2025.117830","DOIUrl":"10.1016/j.jeurceramsoc.2025.117830","url":null,"abstract":"<div><div>YSAG:Sm<sup>3+</sup> oxide powders, along with YAG:Sm as a reference material, were synthesized using a chemical precipitation method. The samarium content was fixed at 5 at%, while the scandium content varied from 0 to 50 at% in both the dodecahedral and octahedral sites. The sintering kinetics, microstructure, thermophysical properties, and optical characteristics of the samples were investigated. Results indicated that 50 at% scandium substitution in the octahedral site shifts the absorption peak corresponding to the <sup>6</sup>H<sub>5/2</sub> → <sup>6</sup>F<sub>9/2</sub> transition toward the blue region of the spectrum, thereby increasing absorption at the YAG:Nd laser emission wavelength of 1064 nm from 2.9 to 5.1 cm<sup>−1</sup>. Despite this notable advantage, the composition {Y<sub>2.70</sub>Sc<sub>0.15</sub>Sm<sub>0.15</sub>}[Sc<sub>1</sub>Al<sub>1</sub>]Al<sub>3</sub>O<sub>12</sub> exhibited a 25.1 % reduction in thermal conductivity compared to YAG:Sm. Additionally, the coefficient of thermal expansion of YSAG:Sm ceramics was higher than that of YAG:Sm. It was confirmed that YSAG:Sm<sup>3+</sup> ceramics are promising candidates for use as absorbing cladding in YAG:Nd lasers.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117830"},"PeriodicalIF":6.2,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106055","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
Spark plasma sintering of binderless tungsten carbide: Densification, grain growth mechanism and mechanical properties 火花等离子烧结无粘结剂碳化钨:致密化、晶粒生长机理及力学性能
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-16 DOI: 10.1016/j.jeurceramsoc.2025.117827
Dapeng Sun , Zhongbiao Tang , Jiuxing Zhang , Cuiliu Han , Guojian Lin , Jian Huang , Jingwen Zhang , Jihua Shang , Yan Wang
{"title":"Spark plasma sintering of binderless tungsten carbide: Densification, grain growth mechanism and mechanical properties","authors":"Dapeng Sun ,&nbsp;Zhongbiao Tang ,&nbsp;Jiuxing Zhang ,&nbsp;Cuiliu Han ,&nbsp;Guojian Lin ,&nbsp;Jian Huang ,&nbsp;Jingwen Zhang ,&nbsp;Jihua Shang ,&nbsp;Yan Wang","doi":"10.1016/j.jeurceramsoc.2025.117827","DOIUrl":"10.1016/j.jeurceramsoc.2025.117827","url":null,"abstract":"<div><div>The densification and grain growth mechanism of binderless tungsten carbide (WC) during spark plasma sintering (SPS) were investigated by power-law creep and grain growth models. A comprehensive analysis of the phase composition, microstructure and mechanical properties of binderless WC was also implemented. The effective stress exponents (<em>n)</em> and grain growth exponents (<em>m</em>) were determined, and the isothermal densification of binderless WC was mainly controlled by grain boundary diffusion (<em>n</em> = 1.5) and dislocation climbing (<em>n</em> = 3), respectively. The corresponding apparent activation energies of densification (<em>Q</em><sub><em>d</em></sub>) were calculated to be 419.87 ± 57.88 kJ/mol and 920.81 ± 126.53 kJ/mol. The grain growth mechanism at higher temperatures (1900–2100℃) was determined to be grain boundary diffusion (<em>m</em> = 2). The binderless WC with well-balanced mechanical properties (<em>HV</em> = 2700 ± 27 kgf/mm<sup>2</sup>, <em>K</em><sub><em>Ic</em></sub> = 8.85 ± 0.12 MN/m<sup>3/2</sup>) was prepared via SPS at 1750℃.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117827"},"PeriodicalIF":6.2,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106056","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
Compositionally engineered core@shell Ba(Zr, Ti)O3 for concurrent giant electrocaloric effect and ultra-wide operational window 组合工程core@shell Ba(Zr, Ti)O3,用于同时产生巨大的电热效应和超宽的操作窗口
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-16 DOI: 10.1016/j.jeurceramsoc.2025.117831
Bingbo Wang , Weixue Yang , Zekun Li, Baoyuan Wang, Chen Wu, Ziquan Wang, Chengfeng Li, Jie Wang, Ying Hou
{"title":"Compositionally engineered core@shell Ba(Zr, Ti)O3 for concurrent giant electrocaloric effect and ultra-wide operational window","authors":"Bingbo Wang ,&nbsp;Weixue Yang ,&nbsp;Zekun Li,&nbsp;Baoyuan Wang,&nbsp;Chen Wu,&nbsp;Ziquan Wang,&nbsp;Chengfeng Li,&nbsp;Jie Wang,&nbsp;Ying Hou","doi":"10.1016/j.jeurceramsoc.2025.117831","DOIUrl":"10.1016/j.jeurceramsoc.2025.117831","url":null,"abstract":"<div><div>Simultaneously achieving large adiabatic temperature change (Δ<em>T</em>) and broad temperature span (<em>T</em><sub>span</sub>) remains a key challenge in eco-friendly electrocaloric ceramics. This work demonstrates a compositionally ordered core-shell design in Zr-doped BaTiO<sub>3</sub> (BaZr<sub><em>x</em></sub>Ti<sub>1-<em>x</em></sub>O<sub>3</sub>, 0.10 ≤ <em>x</em> ≤ 0.25) that synergistically enhances both parameters. Precise Zr gradient engineering induces phase transition overlap and strengthens relaxor behavior through controlled diffusion. The compositionally sandwiched core@double-shell architecture achieves a record Δ<em>T</em> of 6.6 K maintained over an ultra-wide <em>T</em><sub>span</sub> &gt; 70 °C (Δ<em>T</em> ≥ 90 % Δ<em>T</em><sub>max</sub>), representing a ∼ 2-fold <em>T</em><sub>span</sub> extension compared to conventional homogeneous counterparts. Remarkably, the system exhibits the highest EC efficiency (<em>η</em>, 19.81) and refrigerant capacity (<em>RC</em>, 603.1 J kg<sup>−1</sup>) among lead-free electrocaloric ceramics. These breakthroughs originate from the coupled effects of Zr-modulated phase transition characteristics and interfacial polarization enhancement in the hierarchical structure. Our findings provide a generalizable microstructural design strategy for high-performance solid-state cooling materials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117831"},"PeriodicalIF":6.2,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106057","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
Regulation of oxygen vacancies in ITO powders and its impact on densification behavior ITO粉末中氧空位的调控及其对致密化行为的影响
IF 6.2 2区 材料科学
Journal of The European Ceramic Society Pub Date : 2025-09-16 DOI: 10.1016/j.jeurceramsoc.2025.117829
Weilong Zhong , Jishu Zeng , Xingyu Zhou , Long Hu , Yecheng Liang , Min Lin , Yimin Li , Zhijie Fang , Yongqing Wang
{"title":"Regulation of oxygen vacancies in ITO powders and its impact on densification behavior","authors":"Weilong Zhong ,&nbsp;Jishu Zeng ,&nbsp;Xingyu Zhou ,&nbsp;Long Hu ,&nbsp;Yecheng Liang ,&nbsp;Min Lin ,&nbsp;Yimin Li ,&nbsp;Zhijie Fang ,&nbsp;Yongqing Wang","doi":"10.1016/j.jeurceramsoc.2025.117829","DOIUrl":"10.1016/j.jeurceramsoc.2025.117829","url":null,"abstract":"<div><div>The concentration of oxygen vacancies in ITO (indium tin oxide) powders plays a critical role in determining their optoelectronic properties and sintering performance. In this study, ITO powders with varying oxygen vacancy concentrations—24.05 %, 29.80 %, 30.86 %, and 44.74 %—were prepared by annealing in four different atmospheres: H<sub>2</sub>, Ar, N<sub>2</sub>, and O<sub>2</sub>, respectively. The sintering densification behaviors of these powders were systematically investigated using TMA. The results indicated that in the initial sintering stage (800–1050°C), a higher oxygen vacancy concentration (44.74 % in ITO-H<sub>2</sub>) significantly enhanced densification. However, the highest final density (&gt;85 %) was achieved by the ITO-O<sub>2</sub> sample with the lowest oxygen vacancy concentration (24.05 %) after the second stage (1050–1350°C) and the final stage (1350–1500°C) of sintering shrinkage. Notably, the ITO powder annealed in N<sub>2</sub> exhibited significantly poor densification during all stages, reducing linear shrinkage by 16 %, which was attributed to the formation of Sn-N bonds.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 2","pages":"Article 117829"},"PeriodicalIF":6.2,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106059","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信