Anomalous frequency dependence of electrical conductivity of low alkali concentration germanate glasses

被引：0

作者：

Krishnaswami, S ^{[1
]}

Jain, H ^{[1
]}

Nowick, AS ^{[1
]}

机构：

[1] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

来源：

ADVANCES IN DIELECTRIC CERAMIC MATERIALS | 1998年 / 88卷

关键词：

D O I：

暂无

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：

The existence of the usual Universal Frequency Response (UFR) of ac conductivity, sigma(ac)similar to omega(s) where omega is the angular frequency and s similar or equal to 0.6 is observed for xK(2)O.(1-x)GeO2 glasses with x greater than or equal to 0.02. However, a departure from this power law is observed for a potassium germanate glass containing 0.23 mol% alkali oxide. It appears that this anomaly is a Debye-type dipolar relaxation at very low alkali concentration which transforms into UFR in the high alkali concentration glasses. A similar behavior of conductivity was reported earlier for crystalline quartz containing very low concentration of charge carrier ions.

引用

页码：353 / 361

页数：9