The Effect of Yttrium Oxide on the Microstructure and Properties of Ceramics Based on Lanthanum Hexaaluminate Synthesized by the Sol–Gel Method

The effect of a sintering aid, yttrium oxide, on the properties of ceramic materials based on lanthanum hexaaluminate synthesized by a sol-gel method is studied. The synthesis of a sol of ternary oxide composition conducted via hydrolysis of a mixed salt solution leads to the formation of particles...

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Published inRefractories and industrial ceramics Vol. 45; no. 1; pp. 31 - 35
Main Authors Dudkin, B N, Bugaeva, A Yu, Zainullin, G G, Filippov, V N
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.01.2004
Subjects
Ceramics
Hydrolysis
Lanthanum
Oxides
Sintering
Sol gel process
Synthesis
Yttrium oxide
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Summary:The effect of a sintering aid, yttrium oxide, on the properties of ceramic materials based on lanthanum hexaaluminate synthesized by a sol-gel method is studied. The synthesis of a sol of ternary oxide composition conducted via hydrolysis of a mixed salt solution leads to the formation of particles with a "nucleus - shell"-type structure. The synthesis of lanthanum hexaaluminate with the participation of these particles proceeds at 1000 - 1100°C, and the sintering of ceramic at 1400 - 1500°C. Ceramic based on yttrium-containing lanthanum hexaaluminate exhibits improved strength properties.[PUBLICATION ABSTRACT]
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1083-4877
1573-9139
DOI:10.1023/B:REFR.0000023348.19718.73