PHASE-SEPARATION DURING ISOTHERMAL SINTERING OF (1-X)SIO2-XLN2O3 AEROGELS

被引：11

作者：

BOUAZIZ, J ^{[1
]}

BOURRET, D ^{[1
]}

SIVADE, A ^{[1
]}

GRILL, C ^{[1
]}

机构：

[1] UNIV MONTPELLIER 2,MICROSCOPIE ELECTR LAB,F-34095 MONTPELLIER,FRANCE

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1992年 / 145卷 / 1-3期

关键词：

D O I：

10.1016/S0022-3093(05)80432-6

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：

Rare earth silicate aerogels (1-x)SiO2-xLn2O3, with Ln = Dy or Er, have been prepared by the sol-gel process, starting from Dy or Er nitrates and TMOS. After an isothermal treatment of the aerogels, transparent glasses resulted when starting from aerogels with an Ln2O3 mole fraction x < 0.05. For higher concentrations, the samples remained opaque even after an isothermal treatment at 1300-degrees-C for 15 min. From SEM studies, one is able to observe a phase segregation in both (1-x)SiO2-xDy2O3 and (1-x)SiO2-xEr2O3 glasses after the isothermal treatment. The (1-x)SiO2-xDY2O3 sample shows a residual porosity of about 10%.

引用

页码：71 / 74

页数：4