人工晶体学报, 2020, 49 (10): 1911, 网络出版: 2021-01-09  

纳米Y2O3悬浮液流变性能及注浆成型研究

Rheological Behavior and Slip Casting of Nano Y2O3 Aqueous Suspension
作者单位
辽宁石油化工大学机械工程学院,抚顺 113001
摘要
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。
Abstract
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.
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常玉坤, 王涛, 何娇, 张雪, 连景宝. 纳米Y2O3悬浮液流变性能及注浆成型研究[J]. 人工晶体学报, 2020, 49(10): 1911. CHANG Yukun, WANG Tao, HE Jiao, ZHANG Xue, LIAN Jingbao. Rheological Behavior and Slip Casting of Nano Y2O3 Aqueous Suspension[J]. Journal of Synthetic Crystals, 2020, 49(10): 1911.

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