注凝成型超细二氧化锆悬浮体的制备  

Preparation of Ultrafine Zirconia Suspension for Gelcasting

作　　者：王金锋[1] 高雅春[2] 谢志鹏[3] 孙加林[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]河北理工大学轻工学院,河北唐山063020 [3]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《材料工程》2008年第3期18-21,27,共5页Journal of Materials Engineering

基　　金：国家973项目课题(G2000067204-01)

摘　　要：研究了注凝成型超细ZrO2粉体（d0.5=0.199μm）悬浮体的特性及制备工艺。研究表明：采用A型分散剂（聚丙烯酸盐）,分散剂用量为ZrO2粉体体积的2%-2.5%；料浆pH值为10-11；研磨时间为12h,可制备出固相体积分数达到54%的料浆悬浮体,料浆黏度为0.952 Pa.s,能够满足凝胶注成型的要求。并且可得到素坯弯曲强度达到50.09MPa的坯体,1550℃保温2h获得了结构致密、晶粒细小均匀的ZrO2陶瓷烧结体。Properties and preparation of ultrafine ZrOz （d0.5=0.199μm）suspension in gelcasting were investigated. It is proved that A-type dispersant is suitable for the suspension and the amount of it is 2%-2.5% of ZrO2. pH value of suspension should range from 10 to 11. Milling time of slurry is about 12h. ZrOzsuspension was prepared with 54% solid loading, viscosity of which was 0. 952 Pa ·s and it could be used in gelcasting process. The bending strength of green body was 50.09 MPa and the sintered ZrO2 ceramics with fine crystal compact structure was produced at 1550℃ holding 2h.

关 键 词：分散剂 PH值 固相含量 研磨时间 

分 类 号：TB383[一般工业技术—材料科学与工程]