Effect of homovalent anion doping on the conductivity and phase transitions in Na2SO4

被引：8
|
作者：
Gomathy, S [1 ]
Gopalan, P [1 ]
Kulkarni, AR [1 ]
机构：
[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 1999年 / 146卷 / 01期
关键词：
D O I：
10.1006/jssc.1999.8258
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
An attempt has been made to understand the effect of doping homovalent anion dopants such as CO32-, B4O72-, MoO42-, and WO42- on the conductivity and phase transitions of Na2SO4 by means of XRD, DSC, and impedance measurements. Our studies indicate that the observed conductivity enhancement is largely due to an increase in the free volume in the structure. Apart from the size, the shape and orientational ordering of the dopant ion in the sulfate sublattice seem to influence the activation energy. The structure of the guest anion appears to be one of the major factors determining the phase stabilization of Na2SO4 (I) at low temperatures, (C) 1999 Academic Press.
引用
收藏
页码：6 / 12
页数：7
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