水溶性高分子聚丙烯酰胺对氧化铝注凝成型的影响  

EFFECT OF WATER-SOLUBLE POLYACRYLAMIDE ON GELCASTING OF ALUMINA

作　　者：马景陶[1] 谢志鹏[1] 黄勇[1] 苗赫濯[1] 程一兵 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]School of Physics and Materials Engineering,Monash University,Clayton,Victoria 3800 Australia

出　　处：《硅酸盐学报》2002年第6期716-720,共5页Journal of The Chinese Ceramic Society

基　　金：973重大基础研究项目(G2000067204-01)。

摘　　要：为了解决坯体表面起皮现象,避免氧阻聚,陶瓷注凝成型必须在氮气保护下进行。研究表明:通过添加适量的水溶性高分子聚丙烯酰胺(PAM)到陶瓷悬浮体中,可以消除在空气中注凝成型的坯体的表面起皮现象,并且可提高坯体的抗弯强度。在PAM存在下,研究和分析了A12O3粉末在水中的分散特性,Al2O3悬浮体的流变特性和固化特性。同时对坯体的抗弯强度和显微结构进行了测试和观察。The dispersion of alumina powders in water, the rheological behaviors and gelling behavior of the alumina suspension in the presence of PAM were investigated and the flexural strength and microstructure of the green bodies were observed. The results show that the surface-exfoliation phenomenon of green bodies gelcasted in air can be eliminated via adding a proper amount of water-soluble polyacrylamide (PAM) to the ceramic suspension and the strength of the green bodies is enhanced.

关 键 词：水溶性高分子 聚丙烯酰胺 氧化铝 注凝成型 表面质量 干坯强度 陶瓷胶态成型 

分 类 号：TQ174.758[化学工程—陶瓷工业]