改性氧化铝黑瓷粉体制备高固相含量浆料的研究  

Study on Rheological Behavior of Alumina Black Porcelain Slurry

作　　者：姚义俊[1] 丘泰[1] 沈春英[1] 杨建[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：《真空电子技术》2005年第4期30-33,共4页Vacuum Electronics

基　　金：江苏省高技术研究计划项目(BG2002025)

摘　　要：通过对氧化铝黑瓷粉料进行预烧技术处理,增大颗粒尺寸、降低粉体比表面能、改善其团聚现象,制备出固相体积分数达55%的氧化铝黑瓷稳定料浆,并研究了分散剂用量、体系固相体积分数、R值(塑性剂/粘结剂)对料浆流变性的影响。研究结果表明:浆料的粘度随剪切速率增加而下降,呈剪切稀化的流变学特性,随着固相体积分数的增加,浆料的最佳分散剂用量也相应增加;浆料的粘度随着R值的增加而急剧减小,流变性能得到明显改善。Preheating is used to increase the dimension of ceramics powder, lower the specific surface energy and improve the phenomenon of aggregation. The alumina black porcelain slurries containing 55% solid volume were obtained by using the preheating technique. The effects of the amount of dispersant, solid volume fraction and the R ratio on the rheological behaviors of the slurries were studied. The results indicate that rheological behaviors of alumina black porcelain slurries appear shearing thinning and the optimum amount of dispersant increases with the increase of solid loading. The viscosity of slurries decreases sharply with the increase of the R ratio, the rheological behaviors of alumina black porcelain slurries were improved obviously.

关 键 词：氧化铝黑瓷 粘度 流变特性 

分 类 号：O373[理学—流体力学]