利用废弃陶瓷材料制备莫来石轻质材料  

Preparation of light-weight mullite materials with ceramics wastes

作　　者：徐娜娜[1] 李淑静[1,2] 李远兵[1] 张金龙 汪雷 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [2]安徽瑞泰新材料科技有限公司,安徽宁国242300

出　　处：《耐火材料》2014年第5期365-367,共3页Refractories

基　　金：教育部科学技术研究重点项目(211115)

摘　　要：为了回收利用废弃陶瓷材料,节约资源,以废弃陶瓷材料为主要原料,加入不同量的黏土(质量分数分别为15%、25%、35%),外加锯末和结合剂,经混料、成型、烘干后,1 200、1 250、1 300、1 350、1 400℃保温3 h热处理,然后检测试样的物理性能,并进行了物相和显微结构分析。结果表明,当废弃陶瓷材料与黏土的质量比为85 15,烧成温度为1 400℃时,试样的综合性能最优;由于热处理过程中发生了莫来石化,试样中的主要物相为莫来石;1 400℃热处理后试样的孔隙直径比1 200℃的大,基质结构也更加致密,由K2O、SiO2、Al2O3组成的液相也较多,因而使材料的强度增大。In order to recycle ceramics wastes and save resources,mullite specimens were prepared using ceramics wastes as main starting materials,adding 15%,25% or 35% （in mass,the same hereinafter）of clay,extra-adding saw powder and binder,mixing,molding,drying,and hot treating at 1 200,1 250,1 300, 1 350 and 1 400 ℃ for 3 h,respectively.The physical properties of specimens were determined,the phase compositions and microstructure were analyzed.The results show that：the specimens have the best prop-erties with the mass ratio of ceramics wastes over clay of 85 15 and hot treated temperature of 1 400℃;the main phase of specimens is mullite because of the mullitization during the heat treatment;compared with the specimen treated at 1 200 ℃,that treated at 1 400 ℃ has larger pore diameter,denser matrix structure, and more liquid phase composed of K2 O,SiO2 and Al2 O3 ,therefore the strength improves.

关 键 词：废弃陶瓷材料 黏土 莫来石 液相 强度 

分 类 号：TQ175[化学工程—硅酸盐工业]