Journal of The European Ceramic Society最新文献_第9页

Abnormal failures of CMAS corrosion on suspension plasma sprayed thermal barrier coatings based on β-(Ni,Pt)Al bondcoat at 1300 °C β-(Ni,Pt)Al基悬浮等离子喷涂热障涂层在1300℃时CMAS腐蚀异常失效

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI: 10.1016/j.jeurceramsoc.2025.117548

D. Huang , J. Wang , Y.S. Niu , S. Li , Z.B. Bao , S.L. Zhu , F.H. Wang

引用次数: 0

Coupled roles of MgF2 additive on sintering of sub-micron alumina transparent ceramics MgF2添加剂在亚微米氧化铝透明陶瓷烧结中的耦合作用

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI: 10.1016/j.jeurceramsoc.2025.117547

Yan Wang , Haohao Ji , Dewen Wang , Shunzo Shimai , Xiaojian Mao , Jian Zhang , Shiwei Wang

{"title":"Coupled roles of MgF2 additive on sintering of sub-micron alumina transparent ceramics","authors":"Yan Wang , Haohao Ji , Dewen Wang , Shunzo Shimai , Xiaojian Mao , Jian Zhang , Shiwei Wang","doi":"10.1016/j.jeurceramsoc.2025.117547","DOIUrl":"10.1016/j.jeurceramsoc.2025.117547","url":null,"abstract":"<div><div>High-quality transparent Al<sub>2</sub>O<sub>3</sub> ceramics were successfully prepared using MgF<sub>2</sub> as a sintering additive. Comprehensive investigations involving microstructure characterization, optical/mechanical properties, and sintering kinetics analysis found that F anions play a dominant role in enhancing densification with slight effects on grain size. While Mg cations primarily suppress grain growth through solute drag effects. Significantly, the combining functions of Mg and F confer MgF<sub>2</sub> remarkable superiority over both conventional spinel and AlF<sub>3</sub> additives upon the preparation of transparent Al<sub>2</sub>O<sub>3</sub> ceramics. Consequently, MgF<sub>2</sub>-doped Al<sub>2</sub>O<sub>3</sub> ceramics with the optimum dopant content (500 ppm) present the highest in-line transmittance of 61.6 % at 640 nm alongside superior mechanical properties (hardness of 21.8 GPa, indentation fracture toughness of 2.73 MPa·m<sup>1/2</sup>). By elucidating the coupled sintering roles of Mg-F pair, this work provides a novel paradigm for designing dual-functional additives in transparent Al<sub>2</sub>O<sub>3</sub> ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117547"},"PeriodicalIF":5.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124866","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

Modified calibration of m-ZrO2 fraction transformed from t-ZrO2 on low-temperature degradation of dental zirconia 由t-ZrO2转化的m-ZrO2馏分对牙科氧化锆低温降解的修正校正

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI: 10.1016/j.jeurceramsoc.2025.117541

Dae-Joon Kim , Choong-Ki Lee

{"title":"Modified calibration of m-ZrO2 fraction transformed from t-ZrO2 on low-temperature degradation of dental zirconia","authors":"Dae-Joon Kim , Choong-Ki Lee","doi":"10.1016/j.jeurceramsoc.2025.117541","DOIUrl":"10.1016/j.jeurceramsoc.2025.117541","url":null,"abstract":"<div><div>This study examines the phase evolution in the low-temperature degradation (LTD) of 3 mol% Y<sub>2</sub>O<sub>3</sub>-stabilized zirconia (3YSZ) in air, establishing a correlation between LTD extents determined using Rietveld refinement and the traditional Garvie and Nicholson method. Fifty-nine 3YSZ specimens were sintered at 1500–1650 °C for 2–20 h and subsequently aged in air at 130–220 °C for up to 20 h. Phase analysis confirms the presence of multiple ZrO<sub>2</sub> polymorphs in 3YSZ, including monoclinic (m), tetragonal (t), tetragonal non-transformable-to-m (t″), cubic (c), and rhombohedral (r) phases, and a minor content of Y<sub>4</sub>Zr<sub>3</sub>O<sub>12</sub>. LTD is primarily associated with the t″→r transformation, induced by compressive strain at grain boundaries, which disrupts the coherency between t- and c-ZrO<sub>2</sub>, ultimately triggering the t→m phase transformation. This process is attributed to the 2.0 % volume expansion accompanying t″→r, imposing tensile strain on the t-ZrO<sub>2</sub> lattice. The resulting strain, along with the tensile strain induced by thermal expansion anisotropy, likely facilitates the migration of oxygen vacancies from Zr<sup>4 +</sup> to Y<sup>3+</sup> nearest-neighbor sites, leading to oxygen ion overcrowding around Zr<sup>4+</sup> and contributing to the destabilization of t-ZrO<sub>2</sub>. During LTD, a systematic decrease in t- and t″-phase content was observed alongside an increase in m- and r-ZrO<sub>2</sub> content, underscoring a strong correlation between LTD extent, measured as the weight fraction phase ratio m/(m + t) through Rietveld refinement, and the ratio m/(m + t + t″ + c + r) determined using the Garvie and Nicholson method. Based on this correlation, a calibration equation is proposed to convert LTD extents obtained using the traditional method into those derived through Rietveld refinement, simplifying the complexity of Rietveld analysis.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117541"},"PeriodicalIF":5.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124863","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 and oxidation properties of tantalum-based Yb2O3 modified MoSi2 ceramic coating 钽基Yb2O3改性MoSi2陶瓷涂层的制备及其氧化性能

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI: 10.1016/j.jeurceramsoc.2025.117546

Lairong Xiao , Guanzhi Deng , Xiaojun Zhao , Yuxiang Jiang , Hongyang Chen , Qinglong Yu , Haitao Dong , Jiarui Li , Sainan Liu , Zhenyang Cai

{"title":"Preparation and oxidation properties of tantalum-based Yb2O3 modified MoSi2 ceramic coating","authors":"Lairong Xiao , Guanzhi Deng , Xiaojun Zhao , Yuxiang Jiang , Hongyang Chen , Qinglong Yu , Haitao Dong , Jiarui Li , Sainan Liu , Zhenyang Cai","doi":"10.1016/j.jeurceramsoc.2025.117546","DOIUrl":"10.1016/j.jeurceramsoc.2025.117546","url":null,"abstract":"<div><div>The high-temperature oxidation susceptibility of tantalum-based alloys severely limits their engineering applications in elevated-temperature environments. In this study, a Yb<sub>2</sub>O<sub>3</sub>-modified MoSi<sub>2</sub> composite ceramic coating was successfully fabricated on a tantalum substrate through a two-step process combining slurry sintering and embedded siliconization, with systematic investigation of its ultra-high-temperature oxidation resistance and failure mechanisms. The ceramic coating exhibits a gradient structure comprising a Yb<sub>2</sub>O<sub>3</sub>-MoSi₂ main layer, a TaSi₂ diffusion layer, and a Ta₅Si₃ transition layer. Under ultra-high-temperature oxidation at 1800 °C, the ceramic coating demonstrates an effective protection duration of 5.5 h. The continuous SiO₂ glass film formed synergistically inhibits oxygen permeation with Yb₂Si₂O₇/Yb₂SiO₅ silicates. Yb³⁺ stabilizes the SiO₂ network structure by reducing non-bridging oxygen content, thereby enhancing oxide film viscosity and impeding oxygen diffusion. This research provides new insights into the compositional design and performance optimization of ultra-high-temperature protective ceramic coatings, advancing the application of tantalum-based materials in aerospace and energy-related fields.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 15","pages":"Article 117546"},"PeriodicalIF":5.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254090","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 oxygen transparency of Hf6Ta2O17 and homologous ZrxTa2O2x+5 series revealed by electrochemical impedance spectroscopy 电化学阻抗谱法揭示了Hf6Ta2O17和ZrxTa2O2x+5系的低氧透明度

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI: 10.1016/j.jeurceramsoc.2025.117549

Harry Charalambous , Maxwell H. Jancich , Peter W.F. Evans , Jesus Rivera , James T. Cahill , Wyatt L. Du Frane , Joshua D. Kuntz , Bruce Yang

{"title":"Low oxygen transparency of Hf6Ta2O17 and homologous ZrxTa2O2x+5 series revealed by electrochemical impedance spectroscopy","authors":"Harry Charalambous , Maxwell H. Jancich , Peter W.F. Evans , Jesus Rivera , James T. Cahill , Wyatt L. Du Frane , Joshua D. Kuntz , Bruce Yang","doi":"10.1016/j.jeurceramsoc.2025.117549","DOIUrl":"10.1016/j.jeurceramsoc.2025.117549","url":null,"abstract":"<div><div>Hf<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub> and Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub> are promising thermal barrier coating (TBC) candidates due to their high melting points and low oxygen diffusivity. Electrochemical impedance spectroscopy was used to study dielectric and ionic properties of these materials, with higher measurement temperatures required and no clear distinction between the bulk and grain boundaries. Activation energies for oxygen diffusion were determined from Arrhenius plots of the measured conductivities: 1.76–1.89 eV for the Zr<sub>x</sub>Ta<sub>2</sub>O<sub>2x+5</sub> (x = 5, 6, 7, 8) homologous series and 2.26 eV for Hf<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub>. Frequency mismatch between the peak imaginary impedance and peak imaginary modulus points to a local relaxation process as the dominant mode of charge transfer rather than a long-range (vacancy migration) mode. A table of activation energies for various TBC ceramics and these materials are presented. Hf<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub> and Zr<sub>6</sub>Ta<sub>2</sub>O<sub>17</sub> are verified to be effective oxygen barriers protecting underlying substrates from oxidative corrosion at high temperatures.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117549"},"PeriodicalIF":5.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107259","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

Pressure-controlled synergy between dehydrogenation and densification in TiH2 sintering TiH2烧结中脱氢和致密化的压力控制协同作用

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-20 DOI: 10.1016/j.jeurceramsoc.2025.117551

Tianxiao Hu , Mengting Lin , Ji Zou , Weimin Wang , Wei Ji , Zhengyi Fu

{"title":"Pressure-controlled synergy between dehydrogenation and densification in TiH2 sintering","authors":"Tianxiao Hu , Mengting Lin , Ji Zou , Weimin Wang , Wei Ji , Zhengyi Fu","doi":"10.1016/j.jeurceramsoc.2025.117551","DOIUrl":"10.1016/j.jeurceramsoc.2025.117551","url":null,"abstract":"<div><div>Titanium hydride (TiH<sub>2</sub>) ceramics have become key high-performance hydrogen storage materials. However, the sintering of TiH<sub>2</sub> faces significant challenges due to the low temperature of dehydrogenation reaction (300–800 °C). In this study, high-pressure spark plasma sintering (HPSPS) technique was employed to successfully realize low-temperature high-density preparation by suppressing dehydrogenation and regulating densification kinetics under a high pressure (200 MPa). Under the optimized conditions (750 °C, 200 MPa, and 10 min), a fully dense single face-centered cubic (FCC) δ-Ti(H) phase bulk material was fabricated. The initial dehydrogenation temperature of samples fabricated by high-pressure spark plasma sintering (HPSPS) was higher than the dehydrogenation temperature of powder. Mechanistic analyses showed that high pressure inhibited hydrogen escape by compressing pores while promoting particle plastic flow and interfacial bonding. Increasing holding time from 5 to 10 min enhanced diffusion-dominated densification but exacerbated dehydrogenation-induced porosity under low-pressure conditions. The study shows that high pressure compaction can alleviate the contradiction between traditional high temperature densification and low temperature decomposition of TiH<sub>2</sub>, and offers a new strategy for the efficient densification of materials for low temperature decomposition.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117551"},"PeriodicalIF":5.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107257","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

Abradable ytterbium disilicate environmental barrier coatings: A study of steam, CMAS and combined steam-CMAS corrosion 耐磨性二硅酸镱环境屏障涂层：蒸汽、CMAS及蒸汽-CMAS复合腐蚀的研究

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-18 DOI: 10.1016/j.jeurceramsoc.2025.117544

A. Lynam , B. Zhang , A. Rincon Romero , E.B. Owusu , F. Xu , G.J. Brewster , G. Pattinson , T. Hussain

{"title":"Abradable ytterbium disilicate environmental barrier coatings: A study of steam, CMAS and combined steam-CMAS corrosion","authors":"A. Lynam , B. Zhang , A. Rincon Romero , E.B. Owusu , F. Xu , G.J. Brewster , G. Pattinson , T. Hussain","doi":"10.1016/j.jeurceramsoc.2025.117544","DOIUrl":"10.1016/j.jeurceramsoc.2025.117544","url":null,"abstract":"<div><div>Abradable environmental barrier coatings (EBCs) are essential for improving gas turbine efficiency with ceramic matrix composites (CMCs). This study examined ytterbium disilicate (Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> or YbDS) abradable EBCs with 8 %, 15 %, and 22 % porosity, deposited via atmospheric plasma spraying. Coatings were exposed to steam, CMAS, and combined steam-CMAS at 1350 °C for 100 hr. Results showed that porosity had minimal impact on corrosion resistance. Steam exposure formed a thin ytterbium monosilicate (Yb<sub>2</sub>SiO<sub>5</sub> or YbMS) layer, while CMAS caused dissolution-precipitation, forming reprecipitated Yb<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> and Yb-apatite (Ca<sub>2</sub>Yb<sub>8</sub>(SiO<sub>4</sub>)<sub>6</sub>O<sub>2</sub>). Combined exposure increased CMAS penetration depth by 25 %, enhanced Yb-apatite formation, and introduced ytterbium aluminium garnet (Yb<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>, YbAG). These findings demonstrate that the interaction of CMAS and steam accelerates coating degradation, highlighting the need for optimized phase composition and microstructure to enhance abradable EBC durability under turbine-relevant conditions.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117544"},"PeriodicalIF":5.8,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155154","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 metallization of AlN ceramics fabricated via direct hot-pressing micro-Ag particles in air 空气中微银颗粒直接热压制备AlN陶瓷的金属化研究

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-18 DOI: 10.1016/j.jeurceramsoc.2025.117542

Zhicheng Ding , Chenghao Zhang , Yang Liu , Chun Li , Xiaoqing Si , Zongjing He , Zhiquan Wang , Jian Cao

{"title":"The metallization of AlN ceramics fabricated via direct hot-pressing micro-Ag particles in air","authors":"Zhicheng Ding , Chenghao Zhang , Yang Liu , Chun Li , Xiaoqing Si , Zongjing He , Zhiquan Wang , Jian Cao","doi":"10.1016/j.jeurceramsoc.2025.117542","DOIUrl":"10.1016/j.jeurceramsoc.2025.117542","url":null,"abstract":"<div><div>AlN metallization substrates hold broad application potential in the field of electronic packaging due to their high thermal conductivity and unique electrical insulation properties. The present work reports a method for preparing Ag coatings by directly pressing and sintering micro-Ag particles on the AlN surface in air without additional brazing fillers or pre-treatment. The in-situ formation of the Ag-containing Al<sub>2</sub>O<sub>3</sub> interlayer (∼200 nm) is critical for the interfacial bonding at the AlN/Ag interface. The diffusion of Ag particles into Al<sub>2</sub>O<sub>3</sub> not only enhances the interfacial adhesion of the Ag layer but also improves thermal conductivity. Notably, AlN/Ag exhibits a high bonding strength of 67.6 MPa with an excellent thermal conductivity of 178.7 W·m<sup>−1</sup>·K<sup>−1</sup> at 950°C. The Ag layer demonstrates superior surface hardness and electrical conductivity at 900°C due to its high density and low grain boundary density.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117542"},"PeriodicalIF":5.8,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124862","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

Abrasion resistance and hardness of Cr-free zinc and iron co-doped spinel and magnesia-spinel refractory matrices for copper smelting 铜冶炼用无铬锌铁共掺尖晶石和镁尖晶石耐火材料基体的耐磨性和硬度

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-18 DOI: 10.1016/j.jeurceramsoc.2025.117545

Ilona Jastrzębska , Joanna Przystaś , Oliwia Pająk , Alan Wilmański , Somnath Mandal

{"title":"Abrasion resistance and hardness of Cr-free zinc and iron co-doped spinel and magnesia-spinel refractory matrices for copper smelting","authors":"Ilona Jastrzębska , Joanna Przystaś , Oliwia Pająk , Alan Wilmański , Somnath Mandal","doi":"10.1016/j.jeurceramsoc.2025.117545","DOIUrl":"10.1016/j.jeurceramsoc.2025.117545","url":null,"abstract":"<div><div>Abrasion resistance is one of the least studied properties of refractories despite its significant contribution to wear mechanisms. This work investigated the abrasion resistance and Vickers hardness of ZnO+Fe<sub>2</sub>O<sub>3</sub> (3:1 by weight) doped alumina-rich spinel and magnesia-spinel that contained multicomponent (Mg,Zn)[Al,Fe]<sub>2</sub>O<sub>4</sub> spinel as a major and minor phase, respectively. Sintered Al<sub>2</sub>O<sub>3</sub>, MgO-stabilized ZrO<sub>2</sub> and MgO were used as standard reference refractory raw material aggregates for comparison. Stationary samples at room temperature were rubbed against a vertically rotating rubber lined wheel on which SiC particles were fed. This abrasion test revealed that (Mg,Zn)[Al,Fe]<sub>2</sub>O<sub>4</sub> spinel occurring as individual grains along with sub-micron precipitates within magnesia grains increase abrasion resistance as compared to MgO. Microstructure of abraded surfaces identified wear mechanisms like microcracking, grain pullout formed craters, abrasion grooves and scraped patches. 3 wt% doped magnesia-spinel and 34 wt% doped alumina-rich spinel were found to be promising wear resistant matrix compositions to make environment-friendly chromium-free refractories for the copper industry.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117545"},"PeriodicalIF":5.8,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139148","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

Tin-rich nano-fluorite evolution in bixbyite indium tin oxide ceramics bixbyite氧化铟锡陶瓷中富锡纳米萤石的演化

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-05-16 DOI: 10.1016/j.jeurceramsoc.2025.117538

Seong-Uk Oh , Dokyum Kim , Young Ki Kim , Ji Hoon Lee , Tae Hoon Lee , Young-Woo Heo , Jeong-Joo Kim , Joon-Hyung Lee

{"title":"Tin-rich nano-fluorite evolution in bixbyite indium tin oxide ceramics","authors":"Seong-Uk Oh , Dokyum Kim , Young Ki Kim , Ji Hoon Lee , Tae Hoon Lee , Young-Woo Heo , Jeong-Joo Kim , Joon-Hyung Lee","doi":"10.1016/j.jeurceramsoc.2025.117538","DOIUrl":"10.1016/j.jeurceramsoc.2025.117538","url":null,"abstract":"<div><div>This study presents an unprecedented experimental observation of fluorite-structured nano-precipitates (NPs) within bulk ITO grains. These NPs, containing higher Sn concentrations than the ITO matrix, form coherent interfaces with the bixbyite (ITO matrix) structure, representing nanoscale compositional heterogeneities that have remained undetected. The NPs form through charge compensation, as local Sn enrichment drives oxygen interstitials to fill intrinsic oxygen vacancies of the bixbyite structure, and their features can be tuned via reduction treatment or heat treatment temperature. EXAFS analysis of samples with high NP density revealed elevated coordination numbers for Sn ions, supporting the presence of oxygen interstitials. Formation of NPs occurs during post-sintering cooling when Sn ions, initially dissolved at high temperatures, are expelled due to decreased solubility. While 2<span><math><mrow><mrow><msubsup><mrow><mi>Sn</mi></mrow><mrow><mi>In</mi></mrow><mrow><mi>•</mi></mrow></msubsup><msubsup><mrow><mi>O</mi></mrow><mrow><mi>i</mi></mrow><mrow><mo>″</mo></mrow></msubsup></mrow><mo>⁢</mo></mrow></math></span> defect clusters in ITO have been previously discussed only through theoretical predictions, this study provides the experimental observation of such clusters in the form of NPs.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 14","pages":"Article 117538"},"PeriodicalIF":5.8,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155153","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