Structural-chemical mechanism of formation of solid solutions in the La2SrAl2O7-Ho2SrAl2O7 system

被引：12

作者：

Isaeva, AS ^{[1
]}

Kozhina, II ^{[1
]}

Toikka, AM ^{[1
]}

Zvereva, IA ^{[1
]}

机构：

[1] St Petersburg State Univ, Fac Chem, St Petersburg 199034, Russia

来源：

GLASS PHYSICS AND CHEMISTRY | 2006年 / 32卷 / 01期

关键词：

D O I：

10.1134/S1087659606010147

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：

The processes of phase formation in the La2O3-Ho2O3-SrO-Al2O3 system are investigated in the temperature range 1200-1500 degrees C. The structural characteristics of the compounds described in the studied system are presented. It is established that the formation of (La1-xHox)(2)SrAl2O7 solid solutions proceeds through the formation of LaAlO3, LaSrAlO4, SrAl2O4, and SrHo2O4 compounds. An increase in the holmium content and the temperature leads to a crossover from the mechanism in which the interaction of LaAlO3 and LaSrAlO4 is a limiting stage to the mechanism in which the decisive role is played by the interactions of SrAl2O4 with Ho2O3 and SrHo2O4 with Al2O3.

引用

页码：106 / 112

页数：7

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