烧结法制备高炉渣CMAS系统微晶玻璃的研究  

Preparation of CMAS Glass-ceramics with Blast Furnace Slag by Sintering

作　　者：胡兰[1] 何峰[1,2] 张文涛[1] 施江[1] 裴可鹏 庞欢欣 王立格[1] 谢峻林[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《人工晶体学报》2017年第7期1267-1273,共7页Journal of Synthetic Crystals

基　　金："十三五"国家重点研发计划(2016YFB0601304)

摘　　要：利用高炉渣及其它辅助原料制备基础玻璃,采用一步烧结法制备主晶相为辉石的CaO-MgO-Al_2O_3-SiO_2(CMAS)微晶玻璃。综合运用DSC,XRD以及场发射扫描电子显微镜等测试手段,分析热处理制度对高炉渣CMAS微晶玻璃的析晶行为及性能的影响。结果表明:随着热处理温度上升,微晶玻璃的主晶相均为辉石,次晶相均为长石,晶相析出量增加,微晶玻璃的体积密度及抗折强度均呈现先增后减趋势。随着热处理时间增加,微晶玻璃的体积密度及抗折强度均呈现下降趋势。当热处理温度为1020℃,晶化时间30 min时,样品的机械性能最好,体积密度为2.690 g·cm^(-3),抗折强度为67.00 MPa。Blast furnace slag and other auxiliary chemical reagent were used for basic glasses making. The CaO-MgO-Al_2O_3-SiO_2（ CMAS） glass-ceramics were prepared by one-step sintering method. Differential scanning thermal spectrum,X-ray diffraction spectrum and field emission scanning electron microscopy were used to investigate the effect of Heat treatment system on crystallization and properties of CMAS glass-ceramics. The results show that with the increase of heat treatment temperature,the main crystal phases of the glass-ceramics are pyroxene, and the secondary crystal phases are feldspar, the precipitation of crystal phase increases,and the bulk density and flexural strength increase first and then decrease. With the increase of heat treatment time,the bulk density and flexural strength showed a decreasing trend. When the heat treatment temperature is 1020 ℃ and the crystallization time is 30 min,the mechanical properties of the sample are the best,the bulk density is 2. 690 g·cm^（-3） and the flexural strength is 67. 00 MPa.

关 键 词：高炉渣 微晶玻璃 烧结 热处理 析晶 

分 类 号：TQ171.72[化学工程—玻璃工业]