石棉尾矿制备原顽火辉石基微晶陶瓷的物相组成演变及性能研究  

Phase Composition Evolution and Properties of Proto-Enstatite-Base Microcrystalline Ceramics Prepared by Asbestos Tailings

作　　者：李湘 孙红娟[1,2] 彭同江[1,2,3] 陈涛 王璨 LI Xiang;SUN Hongjuan;PENG Tongjiang;CHEN Tao;WANG Can(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China;Institute of Mineral Materials and Applications,Southwest University of Science and Technology,Mianyang 621010,China;Analysis and Testing Center,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,绵阳621010 [2]西南科技大学矿物材料及应用研究所,绵阳621010 [3]西南科技大学分析测试中心,绵阳621010

出　　处：《硅酸盐通报》2023年第6期2172-2181,共10页Bulletin of the Chinese Ceramic Society

基　　金：四川省级知识产权专项资金(2022-ZS-00031)。

摘　　要：以石棉尾矿、石英砂尾矿为主要原料,采用一次烧结法制备原顽火辉石基微晶陶瓷。采用X射线衍射、场发射扫描电子显微镜等测试手段,探究不同m(SiO_(2))/m(MgO)质量比、烧结温度对微晶陶瓷晶相组成、微观结构及理化性能的影响。结果表明:随着m(SiO_(2))/m(MgO)质量比、烧结温度的增加,微晶陶瓷中SiO_(2)与镁橄榄石反应生成的顽火辉石含量增加;经1 240~1 280℃烧结后,顽火辉石转变为其高温稳定形态的原顽火辉石,未参与反应的石英相会逐渐转变为方石英相;在m(SiO_(2))/m(MgO)质量比为1.43~3.56、烧结温度为1 280℃时,吸水率、体积密度、线收缩率和抗折强度分别为0.67%~0.15%、2.74~2.16 g·cm^(-3)、10.29%~1.37%、107.51~40.35 MPa,酸碱失量分别小于1.36%和0.13%,各性能指标优于《陶瓷砖》(GB/T 4100—2015)中Ib类低吸水率炻质砖的标准。The proto-enstatite-base microcrystalline ceramics were prepared by one-time method,taking asbestos tailings and quartz sand tailings as main raw materials.The effects of different m(SiO_(2))/m(MgO)mass ratios and sintering temperatures on the crystal phase composition,microstructure and physical-chemical properties of microcrystalline ceramic materials were investigated by X-ray diffraction,field emission scanning electron microscopy and other testing methods.The results show that with the increase of m(SiO_(2))/m(MgO) mass ratio and sintering temperature,the content of enstatite formed by the reaction of SiO_(2) and forsterite in microcrystalline ceramics increases.After sintering at 1 240~1 280 ℃,enstatite is transformed into its high-temperature stable form,proto-enstatite,and the quartz phase that does not participate in the reaction gradually transforms into cristobalite phase.When the m(SiO_(2))/m(MgO) mass ratio is 1.43~3.56 and the sintering temperature is 1 280 ℃,the water absorption,bulk density,linear shrinkage and flexural strength are 0.67%~0.15%,2.74~2.16 g·cm^(-3),10.29%~1.37%,107.51~40.35 MPa respectively,and the acid and alkali corrosion amount is less than 1.36% and 0.13%,respectively.Each performance index is superior to the standard of Class Ib low water absorption stoneware brick in Ceramic tiles(GB/T 4100—2015).

关 键 词：石棉尾矿 微晶陶瓷 m(SiO_(2))/m(MgO)质量比 原顽火辉石 镁橄榄石 石英砂尾矿 

分 类 号：X754[环境科学与工程—环境工程]