IONIC-CONDUCTIVITY OF TETRAGONAL PBSNF4 PREPARED BY SOLID-STATE REACTION IN HF ATMOSPHERE

被引：32

作者：

KANNO, R

NAKAMURA, S

OHNO, K

KAWAMOTO, Y

机构：

[1] Department of Chemistry, Faculty of Science, Kobe University Kobe

来源：

MATERIALS RESEARCH BULLETIN | 1991年 / 26卷 / 11期

关键词：

D O I：

10.1016/0025-5408(91)90116-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tetragonal PbSnF4 prepared by a solid state reaction under streaming gaseous HF has been characterized by X-ray Rietveld analysis, differential scanning calorimetry, differential thermal analysis and ac conductivity measurement. The room-temperature tetragonal phase is composed of the cationic framework made up of layers perpendicular to the c-axis with a sequence of PbPbSnSn. The conductivity vs. temperature curves between 170 and 573 K showed a gradual slope change from a region of high activation energy (E congruent-to 30 kJmol-1) to that of low activation energy (E congruent-to 10 kJmol-1) around room temperature. Such a behavior accompanied no lattice symmetry change, corresponding to a so-called diffuse phase transition.

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页码：1111 / 1117

页数：7

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