| 광화제로서 $Fe_2O_3$, $MnO_2$, $CaF_2$ 및 $TiO_2$의 혼합물이 Mullite화에 미치는 영향 |
| 백용혁, 최상흘1, 정창주, 박현수 |
전남대학교 요업공학과
1한양대학교 요업공학과 |
| Influence of Mixtures Composed of $Fe_2O_3$, $MnO_2$, $CaF_2$ and $TiO_2$ as Mineralizers on Mullitization |
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| ABSTRACT |
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The possiblity of mullitization from the domestic alunite by adding of $Fe_2O_3-MnO_2$, $Fe_2O_3-MnO_2-TiO_2$, $Fe_2O_3-MnO_2-CaF_2$, and $Fe_2O_3-MnO_2-CaF_2-TiO_2$ mixtures as mineralizers was studied at the temperature range between $1, 250^{circ}C$~$1, 430^{circ}C$. The modifying method of domestic alunite was performed by calcination, wet ballmilling, and washing with water. The following results were obtained; 1) When added of 3.0% $Fe_2O_3$ plus 1.0-1.5% $MnO_2$ to modified alunite, the appropriate temperature range of mullite-forming was $1, 350^{circ}C$-$1, 400^{circ}C$. 2) When added of $TiO_2$ as mineralizer, the mullite-forming temperature was higher than not added. 3) When added of $CaF_2$ as mineralizer, the synthesized mullite was resolve at the temperature above $1, 350^{circ}C$. |
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