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J. Korean Ceram. Soc. > Volume 33(10); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(10): 1138.
알콕사이드로부터 $Al_2O_3-TiO_2$계 복합분체의 합성(I) 1. Sol-Gel법에 의한 $Al_2TiO_5$ 분말합성과 첨가제의 영향
정종열, 이형민, 이홍림
연세대학교 세라믹공학과
Preparation of $Al_2O_3-TiO_2$ Composite Powder from Alkoxides (I) 1. Preparation of $Al_2TiO_5$ by the SOl-gel Method and the effects of Additives
Al2TiO5 powder was prepared by the sol-gel processing from th metal alkoxides ; aluminium sec-butoxide (Al(OC4H9)3 and tetraethyl orthotitanate (Ti(OC2H5)4) The particles of Al2TiO5 produced from alkoxides were measured to be below $1.5mutextrm{m}$ and mre than 90% weere below 1 ${mu}{textrm}{m}$ however those from commercial alumina and titania were over 0.5-7${mu}{textrm}{m}$ and only 60% were below 1${mu}{textrm}{m}$ and 90% were below 2.5${mu}{textrm}{m}$ Therefore Al2TiO5 powder produced from alkoxides had the narrower distributionin size than that produced from the commercial alumina and titania powders. The addition of mullite or Al2O3 powder to the prepared aluminum titanate inhibited the grain growth and this resulted in decreased and increase in density.
Key words: Aluminum titanate, Metal alkoxide, Microcrack, thermal expansion
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