Dielectric Relaxation in CaO-Bi2O3-B2O3 Glasses

被引：28
|
作者：
Majhi, Koushik [1 ]
Varma, Kalidhindi B. R. [1 ]
机构：
[1] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India
来源：
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2010年 / 7卷
关键词：
ELECTRONIC POLARIZABILITY; OPTICAL-PROPERTIES; BORATE; CONDUCTIVITY; BASICITY; CRYSTAL;
D O I：
10.1111/j.1744-7402.2009.02438.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Glasses in the system CaO-Bi2O3-B2O3 (in molar ratio) have been prepared using melt-quenching route. Ion transport characteristics were investigated for this glass using electric modulus, ac conductivity and impedance measurements. The ac conductivity was rationalized using Almond-West power law. Dielectric relaxation has been analyzed based on the behavior of electric modulus behavior. The activation energy associated with the electrical relaxation determined from the electric modulus spectra was found to be 1.76 eV, close to that the activation energy for dc conductivity (1.71 eV) indicating that the same species took part in both the processes. The stretched exponent beta (0.5-0.6) is invariant with temperature for the present glasses.
引用
收藏
页码：E89 / E97
页数：9
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