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

Impact of hydroxide precipitation on the sintering and chemical durability of U1-xThxO2 solid solutions 氢氧化物沉淀对U1-xThxO2固溶体烧结和化学耐久性的影响

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-23 DOI: 10.1016/j.jeurceramsoc.2025.117710

L. Callejon , M. Fulchiron , L. Claparede , J. Lautru , N. Clavier , R. Podor , S. Szenknect , N. Dacheux

{"title":"Impact of hydroxide precipitation on the sintering and chemical durability of U1-xThxO2 solid solutions","authors":"L. Callejon , M. Fulchiron , L. Claparede , J. Lautru , N. Clavier , R. Podor , S. Szenknect , N. Dacheux","doi":"10.1016/j.jeurceramsoc.2025.117710","DOIUrl":"10.1016/j.jeurceramsoc.2025.117710","url":null,"abstract":"<div><div>The synthesis conditions of mixed uranium and thorium oxides by hydroxide precipitation (wet process) have been investigated and optimized. This mainly consists of controlling the order and the rate of addition of the reagents, which allows better reproducibility during the precipitation stage. Two synthesis methods were compared: Direct Droplet Adding (DDA, gradual addition of the ammonia solution) and Indirect Droplet Adding (IDA, gradual addition of the cation solution), with all other parameters held constant. The solids produced by these two methods were converted to oxide by calcination and then sintered at 1600°C in a Ar-4 %H<sub>2</sub> atmosphere to produce dense pellets. Although the pellets produced by the two synthesis methods did not differ at the macroscopic scale, differences in microstructure and chemical durability were observed. DDA induced cationic heterogeneity, which limits the densification of the material and leads to the formation of thorium-rich agglomerates. This resulted in significant open porosity at the end of the sintering stage. Conversely, IDA makes it possible to obtain a very homogeneous cationic distribution within the pellet as well as an increased density after sintering. These microstructural differences also influence the chemical durability of the pellets during dissolution tests. In fact, the presence of cationic heterogeneities in the samples prepared by DDA significantly affects the dissolution kinetics and requires an adaptation of the reprocessing conditions due to the refractory character of such heterogeneities. These results therefore highlight the importance of the synthesis protocol on the microstructure and chemical durability of sintered uranium-thorium mixed oxides.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117710"},"PeriodicalIF":6.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739557","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

Residual chlorine prevents full densification of 3 mol% yttria-stabilized zirconia ceramics during ultrafast high-temperature sintering (UHS) 在超快高温烧结（UHS）过程中，余氯阻止3mol %钇稳定氧化锆陶瓷的完全致密化

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-23 DOI: 10.1016/j.jeurceramsoc.2025.117709

Vladimír Prajzler , Zonghao Guo , Stanislav Průša , Richard I. Todd

{"title":"Residual chlorine prevents full densification of 3 mol% yttria-stabilized zirconia ceramics during ultrafast high-temperature sintering (UHS)","authors":"Vladimír Prajzler , Zonghao Guo , Stanislav Průša , Richard I. Todd","doi":"10.1016/j.jeurceramsoc.2025.117709","DOIUrl":"10.1016/j.jeurceramsoc.2025.117709","url":null,"abstract":"<div><div>As-received commercially available 3 mol% yttria-stabilized zirconia (3YSZ) powders often contain residual chlorine, an impurity from powder synthesis, which can negatively impact densification during sintering. This is because the ultra-fast heating rate results in rapid pore closure and entrapment of chlorine species in the sintered samples. This study shows that residual chlorine, detected using Low Energy Ion Scattering (LEIS), significantly hindered the densification of binderless 3YSZ during ultrafast high-temperature sintering (UHS), resulting in only 87 % of theoretical density. Although all as-received 3YSZ powders contained chlorine in comparable amounts, powders with added binder allowed the chlorine to be removed at low temperature, resulting in high sintered densities. This finding shows that the use of appropriate 3YSZ powder with zero or low levels of residual chlorine can avoid the necessity of chlorine elimination through pre-sintering at 1000 °C, which significantly enhances the effectiveness of the UHS method.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117709"},"PeriodicalIF":6.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757481","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

Novel SiCf/YAG composites resistant to water-oxygen corrosion prepared by an optimized SIH route 优化SIH工艺制备新型抗水氧腐蚀SiCf/YAG复合材料

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-22 DOI: 10.1016/j.jeurceramsoc.2025.117708

Guihang Deng, Qingsong Ma, Weide Wang, Lei Guo, Kuanhong Zeng

引用次数: 0

Fabrication and characterization of SiOC(N) cellular structures via 3D-printed polyurethane templates impregnated with polysilazane 用3d打印聚硅氮烷浸渍聚氨酯模板制备和表征SiOC(N)细胞结构

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-22 DOI: 10.1016/j.jeurceramsoc.2025.117706

Rajat Chaudhary , Francesca Agostinacchio , Roberto Canteri , Mattia Biesuz , Antonella Motta , Gian Domenico Sorarù

{"title":"Fabrication and characterization of SiOC(N) cellular structures via 3D-printed polyurethane templates impregnated with polysilazane","authors":"Rajat Chaudhary , Francesca Agostinacchio , Roberto Canteri , Mattia Biesuz , Antonella Motta , Gian Domenico Sorarù","doi":"10.1016/j.jeurceramsoc.2025.117706","DOIUrl":"10.1016/j.jeurceramsoc.2025.117706","url":null,"abstract":"<div><div>Silicon-based Polymer Derived Ceramics (PDCs) represent a unique class of materials synthesized at relatively low temperatures compared to conventional ceramics. Using the replica method, PDCs can be integrated with Additive Manufacturing (AM) via fused filament fabrication (FFF). However, the effect of printing parameters on PDCs’ structure, chemistry, and properties remains unclear. We investigate the fabrication of PDC scaffolds using thermoplastic polyurethane and different nozzle sizes, varying wall thickness. The resulting SiOC(N) structure is characterized using complementary techniques: X-ray diffraction, scanning electron microscopy, and secondary ion mass spectroscopy. Mechanical properties are assessed by measuring Vickers hardness and flexural strength. A potential application of the SiOC(N) cellular structures as scaffolds for bone regeneration is evaluated by studying cell adhesion and metabolic activity. This work highlights how wall thickness impacts the impregnation and pyrolysis processes and affects properties such as hardness and biological behavior, including cell adhesion and metabolic activity.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117706"},"PeriodicalIF":5.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714040","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

Corrosion behavior and mechanisms of MoAlB and Zr-doped MoAlB in static LBE at temperatures up to 700 °C MoAlB和zr掺杂MoAlB在静态LBE中高达700°C的腐蚀行为和机理

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-22 DOI: 10.1016/j.jeurceramsoc.2025.117705

Hanchao Zhang , Guoliang Ren , Ling Li , Yinchun Shi , Xiaofeng Zhao , Na Ni

{"title":"Corrosion behavior and mechanisms of MoAlB and Zr-doped MoAlB in static LBE at temperatures up to 700 °C","authors":"Hanchao Zhang , Guoliang Ren , Ling Li , Yinchun Shi , Xiaofeng Zhao , Na Ni","doi":"10.1016/j.jeurceramsoc.2025.117705","DOIUrl":"10.1016/j.jeurceramsoc.2025.117705","url":null,"abstract":"<div><div>This paper focuses on the corrosion behavior of MoAlB, a potential structural material for the Lead-Bismuth Eutectic cooled Fast Reactor (LBFR). The study aims to understand the corrosion resistance of MoAlB at 700°C in the lead-bismuth eutectic (LBE) environment up to 500 h. The investigation employs advanced characterization techniques and density functional theory (DFT) calculations to elucidate the corrosion mechanisms. The findings indicate that under low oxygen conditions, MoAlB exhibits minimal corrosion with the formation of a thin, protective oxide layer. However, under high oxygen conditions, the corrosive effect intensifies, leading to more pronounced surface damage. The study also reveals that the preferential oxidation of aluminum leads to the formation of aluminum vacancy defects, resulting in lamellated defects in the material. Despite these effects, the oxide layer remains structurally stable, providing protection against further corrosion. The corrosion behavior of Zr-doped MoAlB in LBE was further verified. The results show that Zr doping can increase the thickness of the Al<sub>2</sub>O<sub>3</sub> scale and inhibit Mo oxidation, which in turn may promote the improvement of corrosion resistance. The results of this research provide valuable insights for the development of advanced structural materials for nuclear reactors.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117705"},"PeriodicalIF":5.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714038","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

Combustion synthesis in Ta-Si-N system: Macrokinetics, structure formation and consolidation of TaN-Si₃N₄-Ta₅Si₃ ceramics Ta-Si-N体系中的燃烧合成：TaN-Si₃N₄-Ta₅Si₃陶瓷的宏观动力学、结构形成和固结

IF 6.2 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-22 DOI: 10.1016/j.jeurceramsoc.2025.117707

Yu.S. Pogozhev, E.I. Patsera, B.Yu. Romanenko, T.G. Akopdzhanyan, N.V. Shvindina, P.A. Loginov, E.A. Levashov

{"title":"Combustion synthesis in Ta-Si-N system: Macrokinetics, structure formation and consolidation of TaN-Si₃N₄-Ta₅Si₃ ceramics","authors":"Yu.S. Pogozhev, E.I. Patsera, B.Yu. Romanenko, T.G. Akopdzhanyan, N.V. Shvindina, P.A. Loginov, E.A. Levashov","doi":"10.1016/j.jeurceramsoc.2025.117707","DOIUrl":"10.1016/j.jeurceramsoc.2025.117707","url":null,"abstract":"<div><div>The effects of precursor composition, nitrogen pressure, sample size, and dilution degree on macrokinetic features of combustion, phase evolution, microstructure, and properties of products in the Ta-Si-N system were studied. Ta₅Si₃ exhibits broad stability over the temperature range, while increased nitrogen pressure favors the transformation of Ta₅Si₃ toward nitride phases such as TaN and the formation of Si₃N₄. The incorporation of YAG/MYA additive significantly alters the combustion behavior. They also facilitate the formation of SiAlON by interacting with molten Si and Si₃N₄, thereby increasing the β-Si₃N₄ content and modifying its lattice parameters. Combustion products comprise predominantly faceted β-Si₃N₄ grains, c-TaN/h-TaN, and Ta₅Si₃ grains. The use additive of promotes the in situ growth of β-Si₃N₄ fibers of multiple crystalline modifications (hexagonal, cubic, and trigonal). Hot pressing of the SHS powders yielded dense ceramics based on TaN-Si₃N₄-Ta₅Si₃ with advantageous combination of hardness (17 GPa), fracture toughness (12.4 MPa×m<sup>1/2</sup>), bending strength (568 MPa).</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 1","pages":"Article 117707"},"PeriodicalIF":6.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771876","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

Synergistic enhancement of antiferroelectric energy storage in AgNbO3 ceramics AgNbO3陶瓷中反铁电储能的协同增强

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-20 DOI: 10.1016/j.jeurceramsoc.2025.117701

Shaoqi Guo , Ye Tian , Qunzhi Ma , Yonghao Xu , Dong Yang , Liaona She , Zixiong Sun , Yuanting Wu , Wanyin Ge , Li Jin , Xiaoyong Wei

{"title":"Synergistic enhancement of antiferroelectric energy storage in AgNbO3 ceramics","authors":"Shaoqi Guo , Ye Tian , Qunzhi Ma , Yonghao Xu , Dong Yang , Liaona She , Zixiong Sun , Yuanting Wu , Wanyin Ge , Li Jin , Xiaoyong Wei","doi":"10.1016/j.jeurceramsoc.2025.117701","DOIUrl":"10.1016/j.jeurceramsoc.2025.117701","url":null,"abstract":"<div><div>Antiferroelectric AgNbO<sub>3</sub> has garnered considerable attention for high-power energy storage applications owing to its reversible phase transitions. However, its practical energy storage performance is severely limited by the large polarization-switching hysteresis. Although doping small-radius foreign cations at the Ag site can enhance antiferroelectricity, it typically results in a significant reduction in polarization. Herein, we propose a dual-regulation strategy that synergistically modulates the AFE polarization-switching behavior by combining “chemical pressure” and “the lone-pair electron effect”. To realize this strategy, we propose a co-doped AgNbO<sub>3</sub> system, (Ag<sub>1–5x</sub>Bi<sub>x</sub>Pb<sub>x</sub>)NbO<sub>3</sub> (ABPN100x). The studied results reveal that a small concentration of co-doping (ABPN4) enhances AFE stability while reducing hysteresis and retaining high polarization. Consequently, energy-storage performance is doubled, achieving a <em>W</em><sub>rec</sub> of 3.5 J/cm³ and η of 74 %, compared to undoped AgNbO<sub>3</sub>. At ABPN6, the Curie temperature shifts close to room temperature, where the AFE phase (<em>Pbcm</em>) coexists with the paraelectric phase(<em>P</em>4/<em>mbm</em>). This results in a relaxor-ferroelectric-like behavior, characterized by high polarization and minimized hysteresis, contributing to optimally balanced performance (<em>W</em><sub>rec</sub> = 3.2 J/cm³, η = 82 %). Discharge results for ABPN4 and ABPN8 ceramics show that, under <em>E</em> = 225 kV/cm, the <em>W</em><sub>dis</sub> values are 2.85 and 2.25 J/cm³ , the <em>P</em><sub>D</sub> values are 86.7 and 105.5 MW/cm<sup>3</sup>, and the <em>t</em><sub>0.9</sub> values are 70 and 80 ns, respectively. Our work demonstrates an effective approach to enhance the AFE energy-storage behavior of AgNbO<sub>3</sub>.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117701"},"PeriodicalIF":5.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703472","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

Flexoelectric aging in barium titanate-based ferroelectric ceramics 钛酸钡基铁电陶瓷的挠曲电时效

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-20 DOI: 10.1016/j.jeurceramsoc.2025.117703

Chao Yi , Wenyan Zhong , Shimeng Zhang , Zhenggang Rao , Zhiguo Wang , Zhengqiu Xie , Chunchun Li , Longlong Shu

{"title":"Flexoelectric aging in barium titanate-based ferroelectric ceramics","authors":"Chao Yi , Wenyan Zhong , Shimeng Zhang , Zhenggang Rao , Zhiguo Wang , Zhengqiu Xie , Chunchun Li , Longlong Shu","doi":"10.1016/j.jeurceramsoc.2025.117703","DOIUrl":"10.1016/j.jeurceramsoc.2025.117703","url":null,"abstract":"<div><div>A series of Fe-doped BaTiO<sub>3</sub> ceramics (Ba(Ti<sub>1-<em>x</em></sub>Fe<sub><em>x</em></sub>)O<sub>3</sub>, <em>x</em> = 0.1 mol%-0.3 mol%, BTFO) were designed to systematically investigate their flexoelectricity and aging behavior through defect engineering with acceptor dopants in the BaTiO<sub>3</sub> perovskite structure. An appropriate amount of Fe dopant can induce oxygen vacancy defect dipoles, while excessive doping can lead to charge defects. We observed the maximum flexoelectric coefficient (∼20.8 μC/m) in 0.2 mol%Fe-BTO ceramic. Flexoelectric aging was observed at room temperature in all samples, and the aging rate correlated with the type and concentration of defects. Comparing the time dependence of permittivity and ferroelectricity, the main reason for the aging of BTFO ceramics is that the doping of Fe introduces oxygen vacancies, and the migration and diffusion of oxygen vacancies finally stabilizes over time. These results can provide guidance for improving the flexoelectric properties and understanding the dynamics of the aging process of doped ferroelectric materials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117703"},"PeriodicalIF":5.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711403","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 mechanism of negative dielectric properties of single-phase SnO2 based ceramics via (Sb, Mn) co-doped strategy （Sb, Mn）共掺杂对单相SnO2基陶瓷负介电性能的调控机理

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-20 DOI: 10.1016/j.jeurceramsoc.2025.117700

Yulan Cen , Yu Tan , Le Wang , Jiehuan Cai , Heng Wang , Jiafeng Ma , Taichao Su

{"title":"Regulation mechanism of negative dielectric properties of single-phase SnO2 based ceramics via (Sb, Mn) co-doped strategy","authors":"Yulan Cen , Yu Tan , Le Wang , Jiehuan Cai , Heng Wang , Jiafeng Ma , Taichao Su","doi":"10.1016/j.jeurceramsoc.2025.117700","DOIUrl":"10.1016/j.jeurceramsoc.2025.117700","url":null,"abstract":"<div><div>Single-phase homogeneous materials with negative permittivity show great potential in electromagnetic shielding, new types of stacked capacitors, and inductor. In this work, (Sb, Mn) doped SnO<sub>2</sub> ceramics were prepared using the solid-phase reaction. The single-Sb doped Sn<sub>0.97</sub>Sb<sub>0.03</sub>O<sub>2</sub> (SSO) and (Sb, Mn) co-doped Sn<sub>0.94</sub>Mn<sub>0.03</sub>Sb<sub>0.03</sub>O<sub>2</sub> (SMSO) showed a negative permittivity at the transition temperature (<em>T</em><sub>c</sub>) of 0 and 210 ℃, respectively. The frequency dependent permittivity could be described using the Lorentz-Drude model below <em>T</em><sub>c</sub> while the single Drude model above <em>T</em><sub>c</sub>. The negative permittivity was dominated by the plasma oscillation of the delocalized electrons introduced by the donor Sb<sup>5+</sup> . The enhanced <em>T</em><sub>c</sub> and the decreased absolute value of the SMSO could be due to the decreased electron concentration and mobility upon Mn substitution confirmed by the Hall test and DFT calculation. This work provided the new insight to the mechanisms of negative permittivity and strategies to tune the negative permittivity properties of the single-phase materials.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117700"},"PeriodicalIF":5.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679779","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

Temperature-driven evolution of polar states and phase transitions in 92(Bi0.5Na0.5)TiO3-8BiAlO3 single crystals near the morphotropic phase boundary 92(Bi0.5Na0.5)TiO3-8BiAlO3单晶在致形相边界附近的极性态和相变的温度驱动演化

IF 5.8 2区材料科学

Journal of The European Ceramic Society Pub Date : 2025-07-20 DOI: 10.1016/j.jeurceramsoc.2025.117702

Changpeng Guan , Yongxing Wei , Changqing Jin , Jialin Niu , Yanghuan Deng , Ruihua Nan , Zengyun Jian , Zengzhe Xi , Zhonghua Dai , Roman G. Burkovsky , Li Jin

{"title":"Temperature-driven evolution of polar states and phase transitions in 92(Bi0.5Na0.5)TiO3-8BiAlO3 single crystals near the morphotropic phase boundary","authors":"Changpeng Guan , Yongxing Wei , Changqing Jin , Jialin Niu , Yanghuan Deng , Ruihua Nan , Zengyun Jian , Zengzhe Xi , Zhonghua Dai , Roman G. Burkovsky , Li Jin","doi":"10.1016/j.jeurceramsoc.2025.117702","DOIUrl":"10.1016/j.jeurceramsoc.2025.117702","url":null,"abstract":"<div><div>Single crystals of 92Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-8BiAlO<sub>3</sub> (BNT-8BA) were successfully grown by the flux method. The single crystal exhibits a coexistence of the rhombohedral <em>R</em>3<em>c</em> and pseudocubic <em>Pm</em>—3<em>m</em> phases, with a piezoelectric coefficient <em>d</em><sub>33</sub> of 164 pC/N, a remanent polarization <em>P</em><sub>r</sub> of 25.9 μC/cm<sup>2</sup>, and a coercive field <em>E</em><sub>c</sub> of 41.0 kV/cm, respectively. The electric field-driven irreversible relaxor-to-ferroelectric transition was observed. Notably, in-situ <em>d</em><sub>33</sub> value shows a significant increase in the temperature range of 25 – 82 ℃; meanwhile, the coercive field decreases, the electrostrain is enhanced, and double current peaks appear. Interestingly, the piezoelectric responses exhibit anomalies in the region of 117 − 220 ℃, demonstrating the coexistence of ferroelectric and ergodic relaxor states. The results of the in-situ PFM measurements are consistent with the temperature-dependent variations in piezoelectric and ferroelectric properties. Finally, the transition from rhombohedral to tetragonal phase near 300 ℃ was confirmed via in-situ XRD and PLM analyses.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 16","pages":"Article 117702"},"PeriodicalIF":5.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686334","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