蓝晶石在炭砖中的原位分解及其对性能的影响  

In-situ Decomposition of Kyanite and Its Influence on Properties of Carbon Blocks

作　　者：李亦韦[1] 桑绍柏[1] 李亚伟[1] 

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081

出　　处：《硅酸盐通报》2015年第4期937-940,950,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金项目资助(51202168)

摘　　要：本文在炭砖中添加蓝晶石细粉,讨论了蓝晶石在炭砖中的反应过程及其对炭砖物相变化、显微结构与宏观性能的影响。结果表明,在高导热炭砖试样中添加蓝晶石,焙烧温度达到1300℃以上时发生莫来石化反应,其反应产物二氧化硅可与含碳组分发生碳化反应,有利于增加碳化硅晶须的生成量,改善试样微孔性能。The effect of kyanite addition on the phase transformation, microstructure and macro properties of carbon blocks for blast furnace was investigated in this article. The result showed that the decomposition and mullitization of kyanite could began when coke temperature reached 1300 ~C, silica and mullite was the reaction product of mullitization. Silica could react with carbonaceous components in carbon blocks. With the addition of kyanite, the amount of SiC whiskers formed increased and their aspect ratio became larger. The microstructures of samples were improved due to the in-situ decomposition of kyanite and the more well-developed SiC whiskers.

关 键 词：炭砖 蓝晶石 莫来石化 

分 类 号：TQ175[化学工程—硅酸盐工业]