...
  • 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 >Far-Infrared Study of BaTi_4O_9 Microwave Dielectric Ceramics
【24h】

Far-Infrared Study of BaTi_4O_9 Microwave Dielectric Ceramics

机译：BaTi_4O_9微波介电陶瓷的远红外研究

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

In this work, lattice vibrations in BaTi_4O_9 ceramic were investigated using far-infrared spectra (FIRS), which were transformed by Kramers-Kronig relations into the real and imaginary parts of permittivity spectra. Curve fitting of reflectance spectra shows that 32 vibration modes were observed, among which transverse vibrations at lower frequencies (stretching and bending vibration modes involving A-site cations and TiO_6 octahedra) account for most dielectric loss. An evaluation of dielectric constants and quality factors using an extrapolation method was accomplished. The calculated dielectric constants agree well with the measured ones, while the calculated dielectric losses are about half the measured ones, indicating that noneigen elements such as defects and pores exist and play an important role in BaTi_4O_9 ceramics. A multimode behavior of vibration modes involving Ba-sites was proposed as the origin of dielectric loss.
机译：在这项工作中，使用远红外光谱（FIRS）研究了BaTi_4O_9陶瓷中的晶格振动，该光谱通过Kramers-Kronig关系转换为介电常数谱的实部和虚部。反射光谱的曲线拟合表明，观察到了32种振动模式，其中较低频率的横向振动（涉及A部位阳离子和TiO_6八面体的拉伸和弯曲振动模式）占了最大的介电损耗。使用外推法完成了介电常数和品质因数的评估。所计算的介电常数与所测量的介电常数非常吻合，而所计算的介电损耗约为所测量的介电常数的一半，这表明诸如BaTi_4O_9陶瓷等非本征元素存在并且起着重要的作用。提出了涉及Ba位点的振动模式的多模行为作为介电损耗的起源。

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