Polymorphism and Properties of Bi2W1-xMoxO6 Aurivillius Phases

被引：8

作者：

Voronkova, V. I. ^{[1
]}

Kharitonova, E. P. ^{[1
]}

Rudnitskaya, O. G. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia

来源：

INORGANIC MATERIALS | 2011年 / 47卷 / 02期

关键词：

FERROELECTRIC BI2WO6; BI2MOO6; REFINEMENT; SYSTEM;

D O I：

10.1134/S0020168511010146

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A continuous series of Bi2W1-xMoxO6 solid solutions between the n = 1 Aurivillius phases Bi2WO6 and Bi2MoO6 with a polar orthorhombic structure (gamma-phase) have been prepared by solid-state reactions at 850 (0 < x <= 0.3) and 530-640 degrees C (0.3 <= x < 1), and their thermal and electrical properties have been studied throughout their stability region, between room temperature and 960 degrees C, with the aim of gaining detailed insight into their polymorphism. The results demonstrate that the tungsten-rich (0 <= x <= 0.2) materials undergo a ferroelectric and a reconstructive phase transition like bismuth tungstate, Bi2WO6. The temperatures of both transitions decrease with increasing molybdenum content. The molybdenum-rich materials in the composition range 0.9 <= x <= 1 are similar in properties to bismuth molybdate, Bi2MoO6. In the composition range 0.3 <= x <= 0.8, neither ferroelectric nor reconstructive phase transition was detected.

引用

页码：183 / 191

页数：9

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