• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Ferroelectric behaviours dominated by mobile and randomly quenched impurities in modified lead zirconate titanate ceramics
【24h】

Ferroelectric behaviours dominated by mobile and randomly quenched impurities in modified lead zirconate titanate ceramics

机译：改性锆钛酸铅陶瓷中的可移动和随机淬灭杂质占主导的铁电行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A comparative study of the influence of both mobile and randomly quenched impurities and their associated defect complexes on ferroelectric phase transformations in lead zirconate titanate ceramics has been performed by dielectric spectroscopy and transmission electron microscopy. These investigations have shown a strong dependence of the structure-property relations on the mobility of impurities and/or defect complexes in the temperature range near and below the phase transformation. Impurities-defects which are mobile until temperatures below the transformation are believed to preferentially locate near domain boundaries, resulting in polarization pinning. For these compositions, no evidence of relaxor ferroelectric behaviour was observed. However, for the compositions whose impurities-defects were essentially immobile from temperatures above the ferroelectric phase transformation, relaxor behaviour and polar nanodomains were found. Studies of the influence of electrical and thermal histories on properties provided additional insights into the influence of impurity-defect mobility. Internal dipolar fields were evidenced by strong asymmetries in the polarization electric field behaviours for materials containing mobile impurities which became quenched on cooling within the ferroelectric phase. A model is proposed to explain domain evolution in systems containing randomly quenched or mobile impurities and defects.
机译：通过介电谱和透射电子显微镜对流动和随机淬灭的杂质及其相关的缺陷配合物对锆钛酸铅钛陶瓷中铁电相变的影响进行了比较研究。这些研究表明，在接近和低于相变的温度范围内，结构-性质关系对杂质和/或缺陷配合物迁移率的强烈依赖性。杂质直至温度低于转变温度才可以移动，这些杂质优选优先位于畴边界附近，从而导致极化钉扎。对于这些组合物，没有观察到弛豫铁电行为的证据。然而，对于从铁电相变以上的温度起其杂质缺陷基本不可移动的组合物，发现了弛豫行为和极性纳米域。电气和热历史对性能的影响的研究为杂质-缺陷迁移率的影响提供了更多的见解。内部偶极场由包含移动杂质的材料的极化电场行为中的强不对称性证明，该杂质在铁电相中冷却后被淬灭。提出了一个模型来解释包含随机淬灭或移动的杂质和缺陷的系统中的畴演化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号