金刚石颗粒在水体系中的分散性能研究

摘要

金刚石颗粒在化学镀液介质中的稳定分散是实现复合镀工艺的先决条件.本文测定了金刚石颗粒悬浮液体系中颗粒的Zeta电位和粒径,探索了无机电解质类分散剂(SHP)和非离子型表面活性剂(PEG)对金刚石颗粒在水体系中表面动电位和粒径的影响.研究结果发现,随着SHP含量的增加,体系中金刚石颗粒表面的Zeta电位绝对值出现先增大后减小的趋势;在SHP含量为0.05%质量分数处Zeta电位绝对值出现最大值;表面活性剂SHP在同等含量下分散效果略优于PEG.%Stable dispersion of diamond particles in the bath is of great importance for composite plating. Based on measurement of Zeta potential and particle size of diamond powders, the influence of surfactant concentration on the stability of micro diamond suspension was studied by using such surfactants as sodium hexametaphosphate (SHP) and polyethylene glycol (PEG). It is found that, with the increase of concentration of surfactant SHP, the absolute Zeta potential value of micro diamond in its water suspension increases then decreases; with SHP content 0.05％ (mass fraction), the absolute Zeta potential value of micro diamond reaches the maximum. Comparison between SHP and PEG show that the dispersing effect of SHP is slightly better than PEG at the same concentration.