凝胶注模成型ZTA坯体影响因素的研究  

Influence Factors of Gel Casting ZTA Green Body

作　　者：李延强[1] 于新峰[1] 宋君素[1] 戚凭[1] 

机构地区：[1]青岛大学物理系,山东青岛266071

出　　处：《青岛大学学报（自然科学版）》2004年第1期29-33,共5页Journal of Qingdao University(Natural Science Edition)

基　　金：山东省自然科学基金项目(Y1000F08)

摘　　要：通过测量含不同种类和质量分数粉末浆料的粘度,坯体的密度和线性收缩率,研究了用凝胶注模成型的ZTA陶瓷坯体的影响因素。结果表明,复相悬浮体系统远比单相系统复杂得多。ZrO2和(2ZrO2+SiO2)质量分数增加都能够使浆料的粘度增大,原因是同一悬浮系统中不同粉体颗粒表面的双电层厚度不同。Al2O3悬浮体系统和(2ZrO2+SiO2)可以部分相容,和纯ZrO2则相容性很差。固相质量分数和引发剂质量分数都会影响坯体的线性收缩率和密度。浆料的黏度在其中起了重要作用。The influence factors of gel casting ZTA green body are investigated. The viscosity of slurry with different kinds and mass fraction powder is measured. The liner shrinkage and density of green body are also measured. The results show that composites phase suspension is more complicated than single-phase suspension.The viscosity of slurry increased with increasing ZrO_2 and (2ZrO_2+SiO_2) mass fractions due to the different thickness of electric double layer on the surface of different powder. Al_2O_3 suspension could be consistent with (2ZrO_2+SiO_2)partially,but could not be consistent with ZrO_2 well. Both solid volume fraction and dispersant volume fraction had some effects on shrinkage and density of green body. The viscosity of slurry is a most important influence factor.

关 键 词：凝胶注模 氧化锆增韧 氧化铝 粘度 双电层 ZTA陶瓷坯体 成型工艺 

分 类 号：TQ174.62[化学工程—陶瓷工业] TB321[化学工程—硅酸盐工业]