亚微米SiC在水相介质中的分散性能

Dispersion of SiC Submicron-Powders in Water Suspension

针对亚微米SiC粉体在水相介质中分散难的问题,首先采用单因素实验研究了球磨时间和超声时间对亚微米SiC在水相介质中分散性能的影响。在此基础上采用正交实验研究了分散剂种类、分散剂质量分数和pH值对亚微米SiC在水相介质中分散性能的影响,并用悬浮液吸光度来评价亚微米SiC分散性能。结果表明:分散剂种类对亚微米SiC分散性能影响最大,其次是pH值,分散剂浓度影响最小;亚微米SiC在水相介质中的最佳分散工艺参数为:球磨60min,超声30min,分散剂聚乙烯亚胺(PEI)浓度3.0%,pH=11。

In accordance with the difficult of SiC submicron-powders dispersed in water suspension,the single factor test is firstly used to study the effects of milling time and ultrasonic time on the dispersion of SiC submicron-powders in water suspension.Then the orthogonal test is used to study the effects of dispersant types,dispersant concentration and pH value on the dispersion of SiC submicron-powders in water suspension.And the absorbance is used to evaluate the dispersion of SiC submicron-powders.The results show that the effect of dispersant types on the dispersion of SiC submicron-powders in water suspension is the greatest,followed by the pH value,and the dispersant concentration is the minimum.The optimal dispersing condition is that the milling time is 60 min,the ultrasonic time is 30 min,the mass percent of PEI is 3.0%,and the pH value is 11.