灵敏的反铁电/铁电转换在由手工机械加工诱导的酸银基陶中
Ye Tian1,2,3, Teng Lu3, Shaoqi Guo1
1School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi Province 710021, P. R. China.
Inorganic chemistry
|February 4, 2026
概括
机械和热处理可以改变银酸盐 (AgNbO3) 反铁电/铁电材料的结构. 处理历史影响相位过渡,影响材料特性和设计.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 陶材料通常需要烧结后处理以评估性能.
- 在加工过程中意外的结构变化可能导致错误的结构-属性关系.
- 了解加工效应对于准确的材料设计至关重要.
研究的目的:
- 研究机械和热处理对基于AgNbO3的抗铁电/铁电 (AFE/FE) 材料的影响.
- 阐明加工所诱导的相位过渡机制.
- 为可靠的结构与财产关系研究提供见解.
主要方法:
- 机械加工:手工抛光/磨削和磨削AgNbO3陶和粉末.
- 热处理:回火处理.
- 结构分析:X射线衍射 (XRD) 来识别相变 (AFE(Pbcm) 到FE(R3c)).
主要成果:
- 机械处理 (抛光,研磨,削) 在AFE/FE相界附近的AgNbO3系统中诱导从抗铁电 (AFE,Pbcm) 到铁电 (FE,R3c) 的可逆相过渡.
- 热处理将诱导的FE阶段逆转为AFE阶段.
- 观察到的转变与温度驱动的转变有关,其中包括一个转移稳定的AFE阶段.
结论:
- 基于AgNbO3的材料的结构对处理历史非常敏感,特别是在AFE/FE阶段边界附近.
- 工艺诱导的相位过渡可以通过受控的热处理来逆转.
- 仔细考虑加工参数对于精确的结构属性分析和AgNbO3系统中的材料开发至关重要.
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