SYNTHESIS AND IONIC-CONDUCTIVITY OF A NEW SERIES OF MODIFIED AURIVILLIUS PHASES

被引：55

作者：

KENDALL, KR ^{[1
]}

THOMAS, JK ^{[1
]}

ZURLOYE, HC ^{[1
]}

机构：

[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

来源：

CHEMISTRY OF MATERIALS | 1995年 / 7卷 / 01期

关键词：

D O I：

10.1021/cm00049a010

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：

In the search for a new class of oxygen ion conductors, the new oxygen-deficient Bi(2)Sr(2)M'(2)M''O-11.5 and the non-oxygen-deficient Bi(2)Sr(2)M'2TiO12 (M' = Nb, Ta and M'' = Al, Ga) Aurivillius-like phases were synthesized and their ionic conductivity investigated. AU of the oxygen-deficient materials showed significant oxygen ion conduction, with Bi2Sr2Nb2GaO11.5(3.6 x 10(-2)S/cm at 900 degrees C) exhibiting the highest conductivity. Differential thermal analysis indicated phase transitions in the oxygen-deficient materials. These transitions occurred at temperatures similar to those at which discontinuities were observed in the Arrhenius plots of the conductivity, suggesting the existence of an oxygen vacancy order-disorder transition. The electronic versus ionic contribution to the total conductivity was determined for Bi2Sr2Nb2GaO(11.5), Bi2Sr2Ta2GaO11.5, and Bi2Sr2Nb2TiO12.

引用

页码：50 / 57

页数：8

共 46 条

[1] PHASE-TRANSITIONS AND IONIC-CONDUCTIVITY IN BI4V2O11 AN OXIDE WITH A LAYERED STRUCTURE [J].