화학공학소재연구정보센터
Materials Science Forum, Vol.416-4, 519-524, 2003
Synthesis of aluminium titanate powder by sol-gel technology
The ceramic raw materials, aluminum titanate (beta-AlTiO5), were prepared by the sol-gel method. To produce aluminum titanate powder, aluminum and titanium alcoxides were used as precursors with the addition of hydrochloric acid aiming to produce a translucent gel to minimize the precipitate formation. The most translucent gel obtained showed, by thermal treatment, a typical structural evolution: the direct crystallization of the aluminum titanate phase at 900 degreesC. In this temperature the aluminum titanate phase was detected after 3 hours treatment. With 900 degreesC for 5 hours treatment, the phase becames well crystallized without any change in its characteristics within 10 hours treatment. At 1400 degreesC occurred the formation of aluminum titanate in all prepared samples. The sol-gel method minimized a residual a-alumina and rutile phases when compared with one obtained by conventional method of oxide admixtures.