传统硅酸盐泥浆的胶凝注浆成型工艺  

CEMENTATION CASTING OF CONVENTIONAL SILICATE SLURRY

作　　者：李懋强[1] 杨文颐[1] 彭炳林[1] 

机构地区：[1]中国建筑材料科学研究院,北京100024

出　　处：《硅酸盐学报》2004年第6期704-708,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(No.59972032)资助项目。

摘　　要：研究了固相质量含量达76%～78%的硅酸盐陶瓷泥浆的制备方法。探讨了在上述高浓度泥浆中加入硫铝酸钙后泥浆的流变学性质的变化,硫铝酸钙在水中水解引起溶液电导率的变化,硅酸盐泥浆以及其主要组成成分的ζ电位随泥浆pH值的变化。在此基础上结合成型坯体的SEM形貌观察,提出了添加硫铝酸钙促使硅酸盐泥浆凝固的机理是钙离子向泥浆中释放,使泥浆的离子强度增大,引起泥浆中胶体颗粒的凝聚。以此为基础开发出泥浆的胶凝注浆成型工艺。通过测定成型素坯不同部位的孔隙半径分布,表明用该工艺成型的素坯内部密度分布均匀。A process for making high solid loading silicate slurry (76%-78%, in mass) were studied. Rheological properties of the slurries with or without adding calcium aluminate sulphate as cementation agent and conductivities of water containing calcium aluminate sulphate were investigated. Variations of ξ potentials of the slurry and its main components with the changes of pH value were determined. Based upon the above studies and SEM morphology of formed green bodies the mechanism of consolidation of the silicate slurry by adding calcium aluminate sulphate was proposed. It can be explained that the consolidation of high solid loading silicate slurry is caused by the increase of ionic strength resulting from dissolution of calcium ions into the slurry by hydrolysis of calcium salts. A novel technique, called cementation casting, was developed based on the mechanism proposed. The measurement for the pore size distributions of green bodies at different position verifies that the green bodies with homogeneous density distribution is obtained by the cementation casting.

关 键 词：陶瓷 硅酸盐 注浆成型 胶凝 

分 类 号：TQ174[化学工程—陶瓷工业]