SOL-GEL PROCESS FOR THE PREPARATION OF BA2TI9O20 AND BATI5O11

被引：68

作者：

LU, HC ^{[1
]}

BURKHART, LE ^{[1
]}

SCHRADER, GL ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM ENGN,AMES,IA 50011

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 05期

关键词：

BARIUM TITANATE; SOL-GELS; PROCESSING; PRECURSORS; DIELECTRIC MATERIALS;

D O I：

10.1111/j.1151-2916.1991.tb04329.x

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：

Barium titanate precursors with Ba/Ti ratio 2:9 and 1:5 were prepared by first hydrolyzing titanium alkoxide and then mixing the resulting titania sol with a barium alkoxide-methanol solution. After drying, the xerogels of the precursors of barium titanates were sintered at temperatures from 700-degrees-C (4 h) to 1200-degrees-C (110 h or longer). Characterization of the product was performed using X-ray diffraction and laser Raman spectroscopy. At 700-degrees-C, BaTi5O11 was formed from the 1:5 precursor and a two-phase mixture of BaTi2O5 and BaTi5O11 was formed from the 2:9 precursor. After prolonged heating at 1200-degrees-C, the latter mixture converted to a single-phase material, Ba2Ti9O20.

引用

页码：968 / 972

页数：5

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