莫来石轻质骨料的制备及性能研究  

Preparation and performance lightweight mullite aggregates

作　　者：刘鹏程 茆忠军 遇龙 赵嘉亮 谢志鹏[3] Liu Pengcheng;Mao Zhongjun;Yu Long;Zhao Jialiang;Xie Zhipeng(Jiangsu Zhonglei Energy-save Science and Technology Development Co.,Ltd.,Yancheng 224213,Jiangsu,China;不详)

机构地区：[1]江苏中磊节能科技发展有限公司,江苏盐城224213 [2]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [3]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《耐火材料》2023年第6期491-494,共4页Refractories

摘　　要：以蓝晶石细粉为原料,核桃壳粉为造孔剂,硅溶胶为结合剂,制备了莫来石轻质骨料。研究了煅烧温度(分别为1 300、1 400、1 500、1 600℃,保温时间均为180 min)和保温时间(分别为60、120、180 min,煅烧温度均为1 500℃)对莫来石轻质骨料体积密度、显气孔率、烧后线变化率、物相组成和显微结构的影响。结果表明,在1 500℃保温60 min所得莫来石轻质骨料的综合性能最优,其体积密度为1.18 g·cm^(-3),显气孔率为59.8%,烧后线变化率为2.58%,莫来石相含量为86%(w)。Lightweight mullite aggregates were prepared with cyanite fine powder as the main raw material,walnut shell powder as the pore forming agent,and silica sol as the binder.Effects of calcination temperatures(1300,1400,1500,and 1600℃for 180 min)and holding times(1500℃for 60,120,and 180 min)on the bulk density,apparent porosity,linear change rate on heating,phase composition,and microstructure of lightweight mullite aggregates were investigated.The results show that the sample insulated at 1500℃for 60 min exhibits the optimum comprehensive properties,with bulk density of 1.18 g·cm^(-3),apparent porosity of 59.8%,linear change rate on heating of 2.58%,and mullite content of 86 mass%.

关 键 词：硅溶胶 蓝晶石 莫来石轻质骨料 煅烧温度 保温时间 

分 类 号：TQ175.1[化学工程—硅酸盐工业]