采用聚丙烯酸盐（ Ｎａ Ｐ Ａ Ａ、 Ｎ Ｈ４ Ｐ Ａ Ａ） 作为分散剂， 制备了高固相含量（ ～５０ｖｏｌ％ ） 的 Ｙ Ｔ Ｚ Ｐ悬浮液研究了分散剂、粉体粒径和固含量对 Ｙ Ｔ Ｚ Ｐ 悬浮液流变学性能的影响结果表明： 分散剂的含量为１.８ｗｔ％ 时对悬浮液有最好的分散效果悬浮液的粘度随粒径的增加而降低， 高固含量浆料的流动曲线符合 Ｂｉｎｇｈａｍ 模型同时对分散剂的吸附分散机理进行了分析和讨论
Concentrated Y-TZP aqueous suspensions(～50vol%) were prepared by employing poly acrylate(NaPAA and NH4PAA) as dispersant. Zeta potential
of the suspensions was displaced to pH 2.2 by the adsorption of RCOO- group released by PAA salts in aqueous solution. The viscosity was at its lowest
point when NaPAA content was 1.8 wt%. Solids loading and particle size significantly influenced the rheology of Y-TZP suspensions. Concentrated
suspensions(>35vol%)were typical Bingham fluid, second newtonian plateau was observed at high shear rate. Plastic viscosity and yield value
demonstrated sharp ascension in 50 vol% suspension under a shear rate of 20s-1. The appropriate particle size for preparing high solids loading
Y-TZP suspensions was about 350 nm.
参考文献
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