Changes in Valency State of Ions in CuMn(2)O(4) at High Temperatures

被引：16

作者：

Ghare, D. B. ^{[1
]}

Sinha, A. P. B. ^{[1
]}

Singh, L. ^{[1
]}

机构：

[1] Natl Chem Lab, Pune 411008, Maharashtra, India

来源：

JOURNAL OF MATERIALS SCIENCE | 1968年 / 3卷 / 04期

关键词：

D O I：

10.1007/BF00550982

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thin films of copper manganite with three different molar ratios of Cu:Mn viz 1:1, 1:2 and 1:3 have been deposited on quartz plates. The electrical conductivity of these thin films has been studied as a function of temperature. The energy of activation for electrical conduction in these compounds is found to increase from 0.20 eV to about 0.62 eV above 600 degrees K. Differential thermal analysis of bulk sample of copper manganite also shows a small endothermic change at 600 degrees K, while thermogravimetric analysis does not show any change in weight. It has been concluded from these results that the stable form of the ionic configuration of copper manganite at low temperatures, i.e. Cu(1+)[Mn(3+)Mn(4+)]O(4) changes at high temperatures to Cu(2+)[Mn(2)(3+)]O(4)

引用

页码：389 / 394

页数：6

共 14 条

[1] CATION DISTRIBUTION IN CU MN2 O4 [J].