摘要
蛭石是一种具有层状硅酸盐结构的非金属矿物,具有良好的抗氧化性和压缩回弹性,是制备耐高温密封材料的优质原料。论文采用流延法进行材料成型加工,以硬脂酸和硅烷偶联剂A-151为改性剂,考察表面改性对蛭石流延浆料分散稳定性和流变性能的影响。结果表明,硬脂酸改性效果优于硅烷偶联剂A-151,当硬脂酸用量为2%时,高温膨胀蛭石粉体接触角为83°,改性效果显著,球磨制浆的RSH最大为79.2%,分散稳定性较好,浆料流动性最佳,流延坯带表面平整、均匀。
Vermiculite is a kind of non-metallic mineral with layered silicate structure for preparing high-temperature resistant sealing materials with good oxidation resistance and compression resilience.In this paper,the method of tape casting was introduced.The influence of surface modification on the dispersion stability and rheological properties of vermiculite casting slurry was investigated using stearic acid and silane coupling agent A-151 as modifier.The results show that the modification effect of stearic acid is significantly better than that of silane coupling agent A-151.The contact angle and ratio sediment height of thermal expended vermiculite powder can reach 83°and 79.2%respectively using 2%content of stearic acid.The slurry obtained by ball mill exhibit good dispersion stability and rheological property,and the surface of casting strip is smooth and uniform.
作者
钱玉鹏
王路路
吴望妮
田忍杰
江学峰
王飞
QIAN Yupeng;WANG Lulu;WU Wangni;TIAN Renjie;JIANG Xuefeng;WANG Fei(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第7期2326-2329,共4页
Bulletin of the Chinese Ceramic Society
基金
国家级大学生创新创业训练计划(S201910497043)
中央高校基本科研业务费专项(2019III089CG)。
关键词
膨胀蛭石
表面改性
分散稳定性
流变性能
流延成型
expended vermiculite
surface modification
dispersion stability
rheological property
tape casting
