【摘要】 在对纳米α-Al2O3粉体的Zeta电位进行测量的基础上,采用无机电解质类分散剂(SHP),阴离子型表面活性剂油酸,阳离子型表面活性剂十六烷基三甲基氯化铵(CTAC)以及非离子型表面活性剂异丙醇胺(DIPA)对纳米α-Al2O3粉体进行了分散实验,系统研究了超声分散时间、表面活性剂种类和浓度对纳米α-Al2O3粉体在水相介质中分散性能的影响。结果表明,随超声时间的延长和分散剂浓度的增加,纳米α-Al2O3粉体的分散性均出现先增后降的变化规律,对于每一种分散剂均存在最佳超声时间和最佳浓度。纳米α-Al2O3粉体在水相介质中的最佳分散工艺为:超声时间40 min,浓度为1.5%的CTAC。更多还原

【Abstract】 Based on measurement of Zeta potential of α-Al2O3 nano-powders,the influence of supersonic time and surfactant concentration on the stability of α-Al2O3suspension is systematically studied by using such surfactants as sodium henamephosphate(SHP),oleic acid,cyltrimethylammonium chloride(CTAC),and diisopropanolamine(DIPA).The results show that the dispersion of α-Al2O3water suspension firstly increase to a maximum and then decrease with the increase of ultrasonic time.It is the same with the increase of surfactant concentration.CTAC is the best dispersant agent among the four kinds of surfactant used in the experiments,the optimal dispersing condition is 1.5% in mass percent of CTAC and ultrasonic time is 40 min.更多还原