利用低铝高烧失量粉煤灰制备微晶玻璃的研究  

Research on Preparation of Glass-ceramics from Low Alumina and High Ignition Loss Fly Ash

作　　者：肖卓豪[1] 朱立刚[2] 尹志军[3] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西省先进陶瓷材料重点实验室,景德镇333403 [2]玉林师范学院化学与材料科学学院,玉林537000 [3]江西陶瓷工艺美术职业技术学院,景德镇333301

出　　处：《硅酸盐通报》2011年第6期1376-1380,共5页Bulletin of the Chinese Ceramic Society

基　　金：景德镇市科技局工业计划项目(2010-38)

摘　　要：本文以低铝高烧失量粉煤灰为主要原料,采用高温融熔法制备粉煤灰微晶玻璃,粉煤灰的综合利用率可达60%以上。利用DTA分析了所制备基础玻璃的热效应,并据其制定了相应的热处理制度,采用XRD、SEM等检测方法对微晶玻璃试样的晶相种类和微晶结构进行分析研究,并测试了所制备微晶玻璃的抗弯强度等性能。实验表明,粉煤灰玻璃在800℃开始生成Ca5Al6O14晶体,升温至900℃开始有均匀分布的CaSiO3晶相出现,1000℃以上有显著的软化流动现象。所制备的微晶玻璃密度为2.79～2.96 g.cm-3、抗弯强度为112～125 MPa。Using fly ash with low alumina and high ignition loss as main raw material,glass-ceramics had been prepared by conventional melt quenching technique.The comprehensive utilization of fly ash was more than 60%.The influences of heating conditions on crystallization behavior,crystal types and microstructures of the glass-ceramics were investigated by XRD,DSC and SEM.The density and bend strength of the prepared glass-ceramics have been tested.The results show that the Ca5Al6O14 crystallite formed in the matrix glass firstly when crystallization temperature was higher than 800 ℃.Much CaSiO3 grains appeared when crystallization temperature increased to 900 ℃.Further increase treating temperature to high than 1000 ℃,the matrix glass become softening and deformation.The bulk density and bend strength of prepared ash fly glass-ceramics ranges from 2.79-2.96 g·cm-3 and 112-125 MPa,respectively.

关 键 词：粉煤灰 微晶玻璃 制备工艺 抗弯强度 

分 类 号：TQ175[化学工程—硅酸盐工业]