期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 43, 期 4, 页码 1055-1061出版社
SPRINGER
DOI: 10.1007/s11664-013-2975-3
关键词
Potassium sodium niobate; dielectric properties; defects
资金
- Natural Science Foundation of China [11264010, 51002036, 50962004, 21061004, 51102058]
- Project of Department of Science and Technology of Guangxi [12118017-13]
- Natural Science Foundation of Guangxi [BA053007]
- Program for Excellent Talents in Guangxi Higher Education Institutions
- Project of Guangxi Scientific Experiment Center of Mining and Metallurgy and Environment [KH2011YB002]
The dielectric properties and conductivity behavior of WO3-doped K0.5Na0.5 NbO3 ceramics were investigated as a function of temperature (25A degrees C to 600A degrees C) and frequency (40 Hz to 10(6) Hz). The dielectric loss and direct-current (DC) conductivity of the ceramics depend strongly on the tungsten content. A high-temperature dielectric relaxation near temperature of 500A degrees C was observed and analyzed using the semiempirical complex Cole-Cole equation. The activation energy of the dielectric relaxation was estimated to be similar to 2 eV and increased with increasing WO3. The frequency-dependent conductivity can be well described by the universal dielectric response law. The activation energy obtained from the DC conductivity changes from 0.93 eV to 1.49 eV. A possible mechanism for the high-temperature dielectric relaxation and conductivity is proposed based on the activation energy value and defect compensation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据