铝硅凝胶粉对刚玉莫来石气幕挡墙性能和显微结构的影响  

Effect of Alumina-Silica Gel Powder on the Properties and Microstructure of Corundum Mullite Based Gas Curtain

作　　者：王义龙 魏军从[2] 马伟平 张连进 涂军波[2] 梁小龙 王子军 

机构地区：[1]唐山市国亮特殊耐火材料有限公司,唐山063021 [2]河北联合大学河北省无机非金属材料重点实验室,唐山063009

出　　处：《硅酸盐通报》2014年第11期3058-3062,共5页Bulletin of the Chinese Ceramic Society

基　　金：科技部中小企业创新基金项目(11C26211300401)

摘　　要：以临界粒径为1 mm的板状刚玉为骨料,以白刚玉为细粉,以ρ-氧化铝和硅微粉为结合剂,添加不同量的铝硅凝胶粉,浇注成型制备了中间包用刚玉莫来石质气幕挡墙,研究了铝硅凝胶粉对材料物理性能和孔径分布的影响。结果表明:随着铝硅凝胶粉的加入,试样致密度提高,强度增大;在热处理过程中,凝胶粉反应生成莫来石,体积膨胀,促进致密化,降低气孔孔径;加入较多时,使得试样过烧结。在本实验条件下,铝硅凝胶粉加入4%时,刚玉莫来石气幕挡墙性能较好。A corundum mullite based gas curtain dam in tundish was prepared by using tabular corundum of not more than 1 mm as aggregates, white corundum as fines, and ρ-Al2O3 and alumina-silica micropowder as binders and cast forming. The effects of alumina-silica gel powder additions on the physical properties and pore size distribution were investigated. The results show that added alumina-silica gel powder improved the compactness of the specimens. and increased the strength. During heat treatment alumina-silica gel powder. react to form mullite companying a volume expansion. and decreased pore size. As excessive alumina-silica gel powder was added,the specimens were over-sintered. At this experiment conditions,the corundum mullite gas curtain dam with 4% alumina-silica gel powder had an optimum performance.

关 键 词：铝硅凝胶粉 刚玉莫来石 气幕挡墙 孔径分布 显微结构 

分 类 号：TU54[建筑科学—建筑技术科学]