Electrocoloration and oxygen vacancy mobility of BaTiO3
Electrocoloration and oxygen vacancy mobility of BaTiO3
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DOI：
10.1063/1.2802290
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发表时间：
2007-11-01
影响因子：
3.2
通讯作者：
Becker, K. D.
中科院分区：
文献类型：
--
作者：
Yoo, H. -I.;Chang, M. -W.;Becker, K. D.
随着多层陶瓷电容器的钛酸钡基介质层厚度越来越薄，达到亚微米级，钛酸钡的电绝缘性能退化问题越来越受到人们的关注。降解被理解为是由于氧空位的电迁移，并且可以通过从阴极和/或阳极发出的颜色来监测。在单晶BaTiO 3的情况下，棕色从阳极发出，蓝色从阴极发出。我们将通过实验回顾BaTiO 3在电场中颜色的产生，并讨论它们的起源和颜色前沿迁移的动力学。从后者的氧空位迁移率对温度在150-500摄氏度的范围内，随后确定，并与所有的文献数据，通常已被估计的其他手段在高温下进行比较。(C)2007年，美国物理学会。
The electrical-insulation degradation of BaTiO3 is now of growing interest as the BaTiO3-based dielectric layers of multilayer ceramic capacitors are getting thinner to submicron thicknesses. The degradation is understood to be due to the electrotransport of oxygen vacancies and may be monitored by the colors emanating from the cathode and/or anode. In the case of single crystal BaTiO3, a brown color emanates from the anode and a blue color from the cathode. We will experimentally review the generation of the colors in BaTiO3 in electric fields, and discuss their origins and kinetics of color front migration. From the latter the oxygen vacancy mobility against temperature in the range of 150-500 degrees C is subsequently determined and compared with all the literature data that have normally been estimated by other means at elevated temperatures. (C) 2007 American Institute of Physics.