直接发泡法制备高强度硅砂尾矿基泡沫陶瓷  

High Strength Silica Tailing based Foam Ceramics through Direct Foaming

作　　者：张家硕 刘涛涌 韩磊[2] 罗志伟 卢安贤[1] ZHANG Jiashuo;LIU Taoyong;HAN Lei;LUO Zhiwei;LU Anxian(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]中南大学材料科学与工程学院材料学系,湖南长沙410083 [2]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《陶瓷学报》2020年第5期694-699,共6页Journal of Ceramics

基　　金：湖南省科技厅重大专项(KQ1703014);中南大学研究生自主探索创新项目(1053320190437)。

摘　　要：通过直接发泡法制备了多孔轻质高强度硅砂尾矿基泡沫陶瓷。探究了十二烷基硫酸钠(SDS)浓度、固相含量和烧结工艺对样品力学性能和微观结构的影响,发现固相含量为40wt.%的浆料体系发泡体积率大,结构稳定。高温下产生的“孔中孔”结构使样品性能出现反差;在1200℃烧结时,具有21.6 MPa的抗压强度和良好的孔隙率,发现提高烧结温度能够显著提高泡沫陶瓷的抗压强度;泡沫陶瓷的重金属离子浸出和耐酸腐蚀性能测试说明其满足工业生产制品的使用要求,可作绝热与耐火材料使用。High porosity,ultralight and high strength silica tailing foam ceramics were prepared by using direct foaming method.The effects of sodium dodecyl sulfate(SDS)concentration,solid content and sintering process on microstructure and mechanical properties of the samples were systematically.It was found that the slurry system with solid content of 40%had large foaming volume ratio and stable structure.A"pore-in-pore"structure produced at high temperature resulted in samples with contrast performances.After sintering at 1200℃,the sample had a high porosity and the compressive strength was 21.6 MPa,indicating that an increase in sintering temperature significantly improved compressive strength of the foam ceramics.According to the test results of heavy metal ion leaching and acid corrosion resistance,the foamed ceramics meet the requirements of industrial products and can be used as insulating and refractory materials.

关 键 词：直接发泡法 硅砂尾矿 孔隙率 抗压强度 

分 类 号：TQ174.75[化学工程—陶瓷工业]