较粗石英微粉制备超轻硬硅钙石隔热材料  

Lightweight xonotlite insulating material prepared from coarse quartz

作　　者：王贞尧[1] 黄毓敏[1] 吴梅梅[1] 薛国强 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《耐火材料》1997年第3期134-139,共6页Refractories

摘　　要：用中位粒径20μm的粗石英和石灰石为原料，配制成Cao／SiO2摩尔比1．0，水固比20的料浆，倒入3000L的反应釜内进行水热反应，反应温度197℃，时间3h，合成的晶体料浆经XRD、SEM和TEM检测确认为由针状硬硅钙石缠绕组成的中空二次粒子球。球直径为30～100μm，球壁厚2～4μm。在料浆中加入纤维等辅助材料压制成型干燥后．即为容重小于130kg·m－3的超轻硬硅钙石隔热材料。The slurry containing hollow secondary particles of xonotlite were obtained by hydrothermal treatment at 197℃for 3h in 3000L autolave using coarse quartz with average particle size 20μm and lime, molar ratio of CaO／SiO21. 0,weight ratio of .water/solid 20. The hollow secondary particles of xonotlite were investigeted by XRD, SEM and TEM.It was made up of needle-like xonotlite crystal. The outside diameter was abeut 3opm to lOopm. The thickness of shellwas about 2～4μm. The slurry with added fiber and other materials were shaped in a metal mold under pressure. Thebulk density of the body was 130kg·m-3 after it had been dried.

关 键 词：硬硅钙石 粗石英 石灰 隔热材料 耐火材料 

分 类 号：TQ175.79[化学工程—硅酸盐工业]