烧结温度对石棉矿山废石制备微晶玻璃析晶性能的影响  

Effect of Sintering Temperature on Crystallization Properties ofGlass-ceramics Prepared from Asbestos Mine Waste Rock

作　　者：刘全[1,2] 孙红娟 彭同江[1,2,3] 王璨[1,2] LIU Quan;SUN Hongjuan;PENG Tongjiang;WANG Can(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Mianyang,621000,Sichuan,China;Institute of Mineral Materials and Application,Southwest University of Science and Technology,Mianyang,621000,Sichuan,China;Analytical and Testing Center,Southwest University of Science and Technology,Mianyang,621000,Sichuan,China)

机构地区：[1]固体废物处理与资源化教育部重点实验室,四川绵阳621000 [2]西南科技大学矿物材料与应用研究所,四川绵阳621000 [3]西南科技大学分析测试中心,四川绵阳621000

出　　处：《材料导报》2022年第15期82-86,共5页Materials Reports

基　　金：国家重点研发项目(2018YFC1802902)。

摘　　要：以大洪沟石棉矿山废石为原料,采用直接烧结法制备了以镁橄榄石为主晶相、顽火辉石为副晶相的微晶玻璃。采用多种现代分析测试手段,研究了烧结温度(1150~1325℃)对微晶玻璃析晶的晶相、显微结构及性能的影响。结果表明:随着烧结温度的升高,晶相种类不会受到影响,但含量会发生变化,顽火辉石的含量逐渐增加,镁橄榄石晶相的含量略微减少;微晶玻璃中的晶粒长大,晶粒间形成相互交织咬合的结构。所制备的微晶玻璃理化性能较优,在烧结温度为1300℃时,其线收缩率、体积密度和抗折强度达到最大,分别为11.2%、2.78 g/cm^(3)和95 MPa,吸水率最小,为0.03%。The glass-ceramics with forsterite as the main crystalline phase and enstatite as the secondary crystalline phase were prepared by direct sintering method using waste rock from Dahonggou asbestos mine as raw material.The effects of the sintering temperature(1150—1325℃)on the crystalline phase,microstructure and properties of crystallization of glass-ceramics were investigated by using various modern analytical testing methods.The results show that with the increase of sintering temperature,the type of crystalline phase is not affected,but the content changes.The content of enstatite gradually increases,and the content of forsterite slightly decreases;the grains in glass-ceramics grow up,and the interwoven occlusal structure is formed among the grains.The glass-ceramics prepared at the sintering temperature of 1300℃show the optimal physical and chemical properties,of which the linear shrinkage rate,the volume density and the flexural strength are the largest at 11.2%,2.78 g/cm^(3)and 95 MPa,respectively,and the water absorption is the smallest at 0.03%.

关 键 词：石棉矿山废石 微晶玻璃 直接烧结 镁橄榄石 顽火辉石 

分 类 号：X754[环境科学与工程—环境工程]