本文研究了纳米Y－TZP超细粉体分别添加聚丙烯酸钠（NaPAA）及聚丙烯酸铵（NH4PAA）所制备的浆料的稳定性.综合考虑Zeta电位和分散剂的解离条件，pH8～12为浆料的稳定范围.通过对浆料流变性质的测定，给出固含量与其相应的最佳分散剂用量关系，并比较了NaPAA与NH4PAA在稳定高固含量浆料中的分散作用.结果表明，使用NH4PAA可获得较NaPAA低的粘度，且由于它不引入杂质而有更大的优越性.对不同纳米尺寸的Y－TZP，如果吸附等量的分散剂，颗粒越大粘度越低.在一定范围内达到相同的粘度，颗粒越小，所需分散剂用量越多.
The rheological properties of slurry formed by nano-sized Y-TZP were studied. With the adding of dispersant NaPAA or NH4PAA, the optimum pH range for the stable slurry is between 8 to 12. The relationship of the solid loading and the amount of dispersant was obtained. The slurry dispersed with NH4PAA has lower viscosity comparing to tkat of NaPAA. The variation of viscosity with the specific surface area (SSA) of powders was discussed. The viscosity does not change greatly witk SSA if the solid coltent is less than 50wt%. When the solid content is 65wt%, the viscosity increases with SSA exponentially, the finer particles need more dispersant to adsorb to be flowable.
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