氧化铝生产洗涤用陶瓷超滤膜制备工艺的研究

发布时间：2018-06-12 11:23

本文选题：球形氧化铝 + 陶瓷支撑体　；参考：《粉末冶金技术》2017年03期

【摘要】：首先以球形氧化铝为原料,加入黏结剂、增塑剂和水后充分混合,经炼泥、挤压成型工艺制备支撑体坯件,坯件经干燥、烧结工艺制备陶瓷支撑体;然后,以球形氧化铝为原料,采用悬浮液浸涂法在陶瓷支撑体上涂膜,经烘干后形成过渡层;最后,以铝盐为原料,采用溶胶-凝胶法在过渡层表面涂覆溶胶制膜液,将湿膜晾干、烘干、焙烧,自然降温得到氧化铝生产洗涤用陶瓷超滤膜。研究结果表明:该陶瓷超滤膜顶膜孔径50~200 nm,无裂纹和针孔等缺陷,抗压强度高于10 kg×cm~(-2),抗弯强度高于8 kg×cm~(-2)。由此可见,该工艺制备的氧化铝生产洗涤用陶瓷超滤膜颗粒均匀,具有良好的化学稳定性、耐腐蚀、耐高温、耐酸碱,可在氧化铝生产洗涤领域推广和应用。
[Abstract]:Firstly, spherical alumina is used as raw material, binder is added, plasticizer and water are fully mixed, after refining mud, extrusion molding process is used to prepare support billets, the billets are dried and sintered to prepare ceramic support. Using spherical alumina as raw material, the ceramic support was coated with suspension soaking method, and then the transition layer was formed after drying. Finally, using aluminum salt as raw material, sol-gel method was used to coat sol-making solution on the surface of transition layer to dry the wet film. Drying, roasting, natural cooling to alumina production washing ceramic ultrafiltration membrane. The results show that the top membrane of the ceramic ultrafiltration membrane has a pore diameter of 50 ~ 200 nm, no defects such as cracks and pinholes, the compressive strength is higher than 10 kg 脳 cm ~ (-1) ~ (-2), and the bending strength is higher than 8 kg 脳 cm ~ (2) ~ (-2). It can be seen that the ceramic ultrafiltration membrane prepared by this process has good chemical stability, corrosion resistance, high temperature resistance, acid and alkali resistance, and can be popularized and applied in the field of alumina production and washing.
【作者单位】：中国铝业郑州有色金属研究院有限公司;
【基金】：国家自然科学基金资助项目(No.51304216)
【分类号】：TQ051.893;TQ133.1

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