DC CONDUCTIVITY OF SOL-GEL DERIVED GLASSES IN THE SYSTEM FE2O3-SIO2

被引：0
|
作者：
BRAHMA, P [1 ]
CHAKRAVORTY, D [1 ]
MITRA, S [1 ]
机构：
[1] GURUDAS COLL,CALCUTTA 700054,INDIA
来源：
EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY | 1991年 / 28卷 / 05期
关键词：
D O I：
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中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Glasses in the series x Fe2 O3.(1-x) SiO2 with 0.01 < x < 0.1 have been prepared by sol-gel technique. DC resistivity of these glasses have been investigated over the temperature range 300 to 600K. The temperature variation of resistivity is explained on the basis of a small polaron hopping conduction mechanism, the Fe2+ and Fe3+ ions acting as the hopping sites. The high temperature data have been analysed by both the T-1/4 and T-2/5 law respectively as formulated by Triberis and Friedman. The density of localised states is calculated to be in the range 10(19)-10(20) eV-1 Cm-3.
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页码：1139 / 1150
页数：12
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