高含量PANH_4水基氧化铝流延工艺的研究  

Tape Casting of Aqueous Alumina Slurries with HighAmount of PANH_4

作　　者：高磊[1] 李瑞锋[1] 葛林[1] 陈涵[1] 郭露村[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《陶瓷学报》2012年第4期457-462,共6页Journal of Ceramics

基　　金：江苏省科技支撑计划(编号:BE2009169)

摘　　要：以高浓度(～33.3%)的聚丙烯酸铵(PANH4)为基础有机载体,以阿拉伯树胶与醋酸乙烯酯/乙烯共聚胶粉作为塑性剂制备了水基氧化铝浆料。通过流延成型法制备了氧化铝基片。在浆料流变性研究的基础上,重点考察了塑性剂含量和配比对流延生料带拉伸强度及其烧结特性的影响。结果表明:该体系浆料具有良好的适于流延的流变特性。AG与胶粉的加入明显改善了流延生料带表面开裂情况及其成膜性能。当AG与胶粉配比为1∶1、总添加量为8wt%时,流延生料带拉伸强度达到最大(～3.09MPa)。氧化铝基片的体积密度随着塑性剂含量的增加而逐渐降低,其中经1650℃烧结保温2h的基片表面光滑、结构致密。Water-based alumina slurries were prepared for tape casting by using high concentration PANH, as a base organic forming agent, and Arabic gum and crumb rubber as plasticizers. Alumina sheets obtained by tape casting and sintering were also observed. The rheological study of the slurries is focused on the effect of the addition amount of the plasticizers on the tensile strength of the green tapes and the sintering behaviors. The results show that the novel water-based slurries exhibit rheological behaviors quite suitable for tape casting. The addition of Arabic gum and crumb rubber significantly improved the forming performance of the green tapes. The maximum tensile strength （~3.09MPa） of green tapes was obtained as AG and crumb rubber were added at the ratio of 1：1 with total addition of 8%. It is also found that excessive amount of plasticizers leads to the decreased bulk density of the sintered sheets. Sintering at 1650℃ for 2 h results in desirable alumina sheets.

关 键 词：氧化铝 塑性剂 流延成型 流延生料带 

分 类 号：TQ174.75[化学工程—陶瓷工业]