颗粒级配和分散剂对ZrO2浆料流变性能的影响

Effect of grain composition and dispersant on rheological property of ZrO_2 slurry

为了制备高固含量、低黏度的ZrO2悬浮料浆,采用平均粒径分别为21.77、11.40和1.96μm的ZrO2粉体为原料,研究了平均粒径为21.77、11.40和1.96μm的ZrO2粉体的配比(质量比分别为8 1 1、7 1 2、6 2 2、5 2 3、4 2 4、3 3 4)、分散剂(六偏磷酸钠(SHMP)、聚乙二醇600(PEG600)、聚丙烯酰胺(PAM))和固含量(质量分数分别为70%、75%、80%、85%、90%、95%)对ZrO2料浆流变性能的影响。结果表明:当平均粒径分别为21.77、11.40和1.96μm的ZrO2粉体的质量比为5 2 3时,其混合粉料的堆积接近Lisa理论模型,料浆黏度最低;与六偏磷酸钠(SHMP)和聚乙二醇600(PEG600)相比,阴离子型聚电解质的聚丙烯酰胺的分散效果最佳;随着固含量的增加,料浆的黏度逐渐增大,最佳固含量为90%(w)。

Effects of grain composition （mass ratios of ZrO2 powders with average particle size of 21.77, 11.40,and 1.96 μm are 8 1 1,7 1 2,6 2 2,5 2 3,4 2 4,and 3 3 4,respectively）,dispersant （sodium hexametahposphate （SHMP）,polyethylene glycol 600 （PEG600）,polyacrylic amine （PAM））,and solid content （70%,75%,80%,85%,90%,and 95%,in mass）on rheological property of ZrO2 slurry were re-searched to prepare ZrO2 slurry with high solid content and low viscosity.The results show that when the grain composition is 5 2 3,the compaction mixed powder is close to Lisa model and its slurry has the low-est viscosity;PAM has the best dispersing effect;with the increasing solid content,the slurry viscosity rises gradually;the optimal solid content is 90 mass%.