• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Chemistry and Physics >Dielectric properties of Y2O3 donor-doped Ba0.8Sr0.2TiO3 ceramics
【24h】

Dielectric properties of Y2O3 donor-doped Ba0.8Sr0.2TiO3 ceramics

机译：Dielectric properties of Y2O3 donor-doped Ba0.8Sr0.2TiO3 ceramics

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

摘要

Ba0.8Sr0.2TiO3 ceramics doped with Y2O3 from 0 to 0.10 mol exhibit normal ferroelectric phase transition, while the ceramics doped with Y2O3 from 0.20 to 0.30 mol show a giant dielectric constant behavior with loss less than 0.15 at 1 kHz from -40 degrees C to 140 degrees C, which is suggested due to semiconductive grain and the Maxwell-Wagner effect by structure disordering in grain boundary. The analyses of unipolar charge for the semiconductive grain indicate three kinds of dielectric processes: thermally stimulated process of unipolar hopping, dispersion process of dielectric constant with frequency, and phase transition process accompanied with disappearance of giant dielectric constant in cubic phase. The XPS results confirm that some of the barium ions are in low energy state to form e-Ba2+ and to provide hopping sites for electrons. The ceramics doped with Y2O3 from 0.50 to 0.75 mol recover the normal ferroelectricity. The possible mechanics are relevant to binding effect of cation vacancies on electrons. (C) 2013 Elsevier B.V. All rights reserved.

著录项

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