アルミニウムイソプロポキシドの熱分解により調製したアルミナの焼結性
1987 年 95 巻 1104 号 p. 828-830
詳細
1987 年 95 巻 1104 号 p. 828-830
Thermal decomposition process of Al-iso-propoxide as precursor material for alumina was analyzed with a TG-DTA apparatus. Alumina powder was prepared by calcination of the raw material in air and under reduced pressure at several temperatures. The calcined materials were identified by an X-ray powder diffraction method to be γ-alumina below 900°C and α-alumina above 1100°C, of which crystal structures were independent of the atmospheric environment. The powder briquettes were made by a CIP (cold isostatic pressing) method, which were sintered in the temperature range of 1600° to 1800°C. The sinterabilities of alumina were discussed relative to the effects of atmosphere, crystal system, calcination temperature, and firing temperature.
