Impact of volatility, non-stoichiometry, and atmospheres in perovskite piezoelectric and dielectric materials

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-08-21 DOI:10.1111/jace.20080

Clive A. Randall, Hiroshi Nishiyama, Hiroyuki Shimizu

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Abstract

Defect chemistry that results in the thermal processing of dielectric and piezoelectric films, crystals and ceramics ultimately controls the properties and long-term performance of materials and devices. This paper reviews several thermochemical defect reactions using important perovskite base composition dielectrics including Pb(Zr,Ti)O₃, (Na,K)NbO₃, (Bi_0.5Na_0.5)TiO₃‒BaTiO₃, and Ca(Hf,Ti,Mn)O₃. Within this group of perovskite-based functional materials, we note ways the point defects can be formed to create non-stoichiometric compositions changing the overall cation-to-anion ratios during the synthesis process. These reactions can be developed with the loss of volatile species such as metal and oxygen ions. The relative concentrations of these can impact the over conductions in terms of the mixed contributions of ionic conductivity from the oxygen vacancies and the electronic conductivity, along with microstructure and properties in some cases.

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过氧化物压电材料和介电材料中的挥发性、非化学计量和大气的影响

电介质和压电薄膜、晶体和陶瓷热加工过程中产生的缺陷化学反应最终控制着材料和设备的性能和长期表现。本文综述了几种使用重要的包晶基底成分电介质的热化学缺陷反应，包括 Pb(Zr,Ti)O3、(Na,K)NbO3、(Bi0.5Na0.5)TiO3-BaTiO3 和 Ca(Hf,Ti,Mn)O3。在这组基于透辉石的功能材料中，我们注意到了在合成过程中形成点缺陷以改变阳离子与阴离子总体比例的非均一组成的方法。这些反应会导致金属离子和氧离子等挥发性物质的损失。在某些情况下，这些物质的相对浓度会影响到氧空位离子电导率和电子电导率的混合贡献以及微观结构和特性。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.