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J. Korean Ceram. Soc. > Volume 11(3); 1974 > Article
Journal of the Korean Ceramic Society 1974;11(3): 33.
요업원료로서 명반석의 이용에 관한 연구(제III보) Mullite질내화재원료로의 이용
백용혁, 최상흘1
전남대학교 요업공학과
1한양대학교 요업공학과
Utilization of Alunite to Ceramic Raw Materials (III)
ABSTRACT
The possibility of the sources for the manufacture of mullite-rich refractories from the modified domestic alunite was studied. The modifying method of alunite studied were performed by calcination, wet ballmilling, and washing with water. For synthesis of mullite-rich refractories, the modified alunite with the addition of alumina and Fe2O3 as mineralizer was fired at 1350$^{circ}$-155$0^{circ}C$, and the following results were obtained: 1) The suitable firing temperature range was 1450$^{circ}$-150$0^{circ}C$, and adequate amounts of Al2O3 and Fe2O3 were below 30% and 3~4%, respectively. 2) Thermal expansion coefficient proportional to heating temperature was about 5$times$10-6~10$times$10-6cm/cm.deg. 3) The mineralogical compositions of the sintered specimens were found as mainly mullite and corundum.
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