氧化锆/氧化铝复合陶瓷悬浮体的制备及流变性能  

Preparation and Rheological Behaviors of Suspension for Zirconia/Alumina Ceramics Comosite

作　　者：于芳[1] 李玉海[1] 巩甘雷[1] 吕鹏[2] 

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110168 [2]东北大学

出　　处：《沈阳理工大学学报》2007年第4期22-25,共4页Journal of Shenyang Ligong University

摘　　要：选用Al2O3、ZrO2为粉体原料,在不同介质中测定了粉体的Zeta电位和粒度分布;研究了各种固含量条件下分散剂加入量对悬浮体流变性的影响.结果表明:在pH=10-11附近、分散剂的加入量为0.9%(质量百分数,下同)时复合陶瓷悬浮体的表观粘度呈现最低值;在优选实验条件下,固含量为85%的悬浮体表观粘度随剪切速率的增大而降低,带有明显的"剪切变稀"现象,呈现假塑性流体的特征.采用固含量85%的悬浮体,制备出氧化锆/氧化铝复合泡沫陶瓷.Alumina and zirconia powder are used as the raw material, Zeta potential and the granularity distribution of the powder under the different media are determined ; effects of different capacity of dispersant additive under the condition of different solid content on the rheological behaviors of the suspension are investigated. The results show that a low viscosity suspension can be obtained when the pH value is around 10 and the best fraction of adding dispersant is 0. 9wt% ; under the optimized experiments, the nominal viscosity of the 85wt% suspension decreases with the increasing shear rate, with evident shearthinning character- istic, exhibiting the pseudo-plastic liquid characteristic. By using the 85wt% suspension, zirconia/alumina compound foam ceramic is prepared

关 键 词：复合陶瓷 氧化锆 氧化铝 ZETA电位 流变性能 

分 类 号：TQ174[化学工程—陶瓷工业]