以比表面积为18.1 m2/g的纳米粉体Y2O3为原料，柠檬酸铵(TAC)作为分散剂制备Y2O3悬浮液，研究TAC含量、pH值、球磨时间及固相含量对Y2O3悬浮液流变性能的影响。结果表明：加入2.2%(质量分数)的TAC，调节悬浮液的pH值为9.4~11.5，球磨8 h可以获得分散稳定的Y2O3悬浮液；悬浮液的粘度随固相含量的增加而增大，对不同固相含量的悬浮液进行注浆成型，发现固相含量为33%(体积分数)的悬浮液致密度最高。与传统的模压成型工艺相比，注浆成型得到的坯体中粉体颗粒分散均一。

Aqueous Y2O3 suspension was prepared by Y2O3 nano powders with a specific surface area of 18.1 m2/g as raw material and ammonium citrate (TAC) as dispersant, respectively. The influence of concentration of TAC, pH value, ball-milling time and solid loading on the rheological behavior of Y2O3 suspension was investigated. The results indicate that the stable and well-dispersed suspension with 2.2%(mass fraction) TAC and pH value in the range of 9.4 to 11.5 was achieved after 8 h ball-milling. The viscosity of the suspensions increases with increasing solid loading, and the green body of slip casting from 33%(volume fraction) suspension has the highest density. Compared with the traditional die pressing, more homogeneous powder particles in green bodies by slip casting are obtained.