ENHANCED DENSIFICATION BY SEEDING OF SOL-GEL-DERIVED ALUMINUM TITANATE

被引：33

作者：

PRASADARAO, AV ^{[1
]}

SELVARAJ, U ^{[1
]}

KOMARNENI, S ^{[1
]}

BHALLA, AS ^{[1
]}

ROY, R ^{[1
]}

机构：

[1] PENN STATE UNIV,DEPT AGRON,UNIV PK,PA 16802

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 06期

关键词：

ALUMINUM TITANATE; SOL-GEL; SEEDING; SINTERING; MICROSTRUCTURE;

D O I：

10.1111/j.1151-2916.1992.tb04220.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：

Aluminum titanate was prepared by two different methods. A monophasic gel was obtained by cohydrolysis and poly-condensation reactions of chelated aluminum sec-butoxide and titanium isopropoxide. A diphasic gel was obtained from boehmite and anatase. Effects of homogeneous dispersion of magnesium oxide and iron oxide incorporated as alkoxides in the monophasic gel and also the effects of isostructural seed on the crystallization and densification of aluminum titanate obtained from monophasic and diphasic gels were investigated. Seed particles of MgTi2O5 facilitated lowering of crystallization temperature and enhanced densification of aluminum titanate. Microstructure studies indicated that almost-microcrack-free sintered bodies with smaller grains were formed from the seeded monophasic and diphasic gels.

引用

页码：1529 / 1533

页数：5

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