材料에 따른 高溫 Alumina 耐火物 Matrix가 燒結特性과 高溫 Bending에 미치는 影響

Abstract

The results test by adjusting various raw materials and composition conditions for the evaluation of the evaluation of the bending characteristics of Alumina-mullite refractories are as the follows. 1) We have confirmed that the sintering was carried out relatively well even at the temperature of 1550℃ and composition reaction of Mullite was well accomplished when we used Kaolin and Clay as the raw materials of Matrix but the sintering temperature must have been over 1650℃ When we used fine powder of Silica fume. 2) Matrix specimen that has used silica as raw material was poor in sintering at the temperature less than 1650℃ and composition reaction of Mullite was also indicated as low and Mullite composition was not generated at the temperature of 1450℃. Silica fume wite relatively more fine powder showed similar feature but the level of sintering and mullite was higher. 3) We could confirm through the results of measuring the Bending characteristics of Alumina-mullite refractories at high temperature by differentiating raw materials and supplies of the usage of Matrix, that fine powder of Silica used as raw materials and supplies showed good characteristics of bending at high temperature and we believe this is because high temperature liquefied materials generated by the impact of impurities contained in raw materials and supplies are greatly affecting the high temperature bending.