AC IMPEDANCE ANALYSIS OF SINGLE-CRYSTALS OF SR(NO3)2 AND SR(NO3)2 - NA

被引：2

作者：

REDDY, SN ^{[1
]}

CHARY, AS ^{[1
]}

CHIRANJIVI, T ^{[1
]}

SHAHI, K ^{[1
]}

机构：

[1] INDIAN INST TECHNOL, MAT SCI PROGRAMME, KANPUR 208016, UTTAR PRADESH, INDIA

来源：

SOLID STATE IONICS | 1990年 / 42卷 / 1-2期

关键词：

D O I：

10.1016/0167-2738(90)90265-S

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Complex impedance analysis studies on single crystals of Sr(NO3)2 and Sr(NO3)2:Na are presented in the temperature range 300-500°C. Small signal ac response in the frequency range of 5 Hz-1 MHz has yielded the values of dc conductivity, K, tan δ and ac conductivity for both the pure and doped crystals. dc conductivity values deduced from the Cole-Cole plots agree very well with our earlier work in the temperature region of overlap. Increase in the values of all the parameters for the doped case is attributed to the additional anion vacancies created. A small anomaly noticed between 480-520°C is thought to be due to the nitrate ion orientation disorder. Variation of ac conductivity, K and tan δ with temperature are explained to be due to space-charge polarization and the conduction processes. © 1990.

引用

页码：101 / 107

页数：7

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