• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Time Dependence of the Mechanical Quality Factor in 'Hard' Lead Zirconate Titanate Ceramics: Development of an Internal Dipolar Field and High Power Origin
【24h】

Time Dependence of the Mechanical Quality Factor in 'Hard' Lead Zirconate Titanate Ceramics: Development of an Internal Dipolar Field and High Power Origin

机译：硬锆钛酸铅陶瓷中机械品质因数的时间依赖性：内部偶极场和高功率源的发展

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

The time dependences after poling of the mechanical quality factor Q_m, electromechanical coupling coefficient k_(31) and dielectric constant K have been investigated for both "soft" and "hard" lead zirconate titanate (PZT) ceramics. A significant increase of Q_m with time was observed for "hard" PZTs, however "soft" ones did not exhibit any changes during the same time period. The initial Q_m value of rare earth modified Pb(Zr,Ti)O_3-Pb(Sb,Mn)O_3 was only 400 at 10min after poling; however, at t = 2800 min after poling, it had increased to 1600. Correspondingly, a pronounced increase in E_(int) was observed with ln t. The aging rate after poling was found related to the degree of "hard" characteristics. For 10 < t < 2800 min after poling, the value of Q_m for Yb modified Pb(Zr,Ti)O_3 increased from 160 to 250, whereas for Yb modified Pb(Zr,Ti)O_3-Pb(Sb,Mn)O_3 Q_m increased from 400 to 1600 during the same time period. Polarization-electric field (P-E) measurements revealed the development of a shift of the response along the E axes with time. It is believed that an internal dipolar field develops with time, due to a reorientation of defect dipoles along the direction of spontaneous polarization. This results in domain stabilization and increased Q_m. It is proposed that internal dipolar field is the high power origin for "hard" type PZTs.
机译：对于“软”和“硬”钛酸锆钛酸铅（PZT）陶瓷，都研究了机械品质因数Q_m，机电耦合系数k_（31）和介电常数K极化后的时间依赖性。观察到“硬” PZT随时间的Q_m显着增加，但是“软” PZT在相同的时间段内没有任何变化。极化后10min稀土改性Pb（Zr，Ti）O_3-Pb（Sb，Mn）O_3的Q_m初始值仅为400;但是，在极化后的t = 2800 min时，它已经增加到1600。相应地，观察到ln t时E_（int）明显增加。发现极化后的老化率与“硬”特性的程度有关。极化后10

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