Phase stability and equilibria in the La2O3-TiO2 system

被引：53

作者：

Skapin, SD ^{[1
]}

Kolar, D ^{[1
]}

Suvorov, D ^{[1
]}

机构：

[1] Jozef Stefan Inst, Dept Ceram, Ljubljana 1111, Slovenia

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2000年 / 20卷 / 08期

关键词：

TiO2; La2O3; electron microscopy; X-ray methods; dielectric properties; phase equilibria;

D O I：

10.1016/S0955-2219(99)00270-8

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

XRD, electron probe wavelength and energy dispersive X-ray analyses were used to reexamine the phase relations in the La2O(3)-TiO2 system. The diagram was redrawn to include the compound La4Ti3O12 in addition to La4Ti9O24, La2Ti2O7 and La2TiO5. Above 1455 degrees C a cation deficient perovskite La2/3TiO3 is stabilized by a small number of Ti3+ ions and remains stable on cooling in air. The proposed diagram represents a section through the system at the normal oxygen pressure in air at 1 atm, compositions being expressed in terms of the oxide components stable at room temperature. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1179 / 1185

页数：7

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