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利用 FS-Ⅰ,T-100做分散剂,无水乙醇做连续相溶液建立分散体系,分別对超细磁性羰基 Fe 粉和激光制 SiC、Si_3N_4超细粉进行分散。在 TEM 下观察,羰基 Fe 粉分散度高于70%,SiC 粉高于80%,Si_3N_4粉高于95%。经照相记录和采用 CSR-40图像分析系统进行粒度统计,得到三种粉的粒度对数正态分布。羰基 Fe 粉粒度分布12—70nm,SiC 粉粒度分布20—110nm,Si_3N_4粉粒度分布2.5—26nm。讨论了不同分散剂和分散测量方法对分散程度的影响。
Using FS-Ⅰ, T-100 as dispersant and anhydrous ethanol as the continuous phase solution to establish the dispersion system, the superfine magnetic carbonyl Fe powder and the laser-made SiC and Si_3N_4 superfine powder were respectively dispersed. Under the TEM observation, carbonyl Fe powder dispersion degree higher than 70%, SiC powder higher than 80%, Si_3N_4 powder higher than 95%. The particle size statistics of the three kinds of powders were obtained by photographing and using the CSR-40 image analysis system. Carbonyl Fe powder particle size distribution 12-70nm, SiC powder particle size distribution 20-110nm, Si_3N_4 powder particle size distribution 2.5-26nm. The effect of different dispersants and dispersion measurements on the degree of dispersion is discussed.