Abstract： To measure the dispersion of silica accurately, the effect of type and concentration of solutions, ultrasonic power and time in dispersion process on WK dispersion coefficient of silica were studied by laser granularity analyzer after ultrasonic dispersion. The results show that WK dispersion coefficient of silica decreases with the increase of ultrasonic power and time. The dispersion solution should be selected according to the surface property of silica. The hydrophobic silica should choose hydrophobic dispersion solution. The measurement conditions for WK dispersion coefficient of silica include that the ultrasonic power is 840 W, the ultrasonic time is 10 min, and the error of the coefficient is less than 10%.

Keywords: silica; dispersion coefficient; dispersion

中图分类号：TB14        文献标志码：A

文章编号：1008-5548（2015）01-0007-05

DOI:10.13732/j.issn.1008-5548.2015.01.002

收稿日期：2014-02-28， 修回日期：2014-04-09，在线出版时间：2015-03-02。

基金项目：山西省“十二五”重大专项子项目，编号：20111101060；中国矿业大学（北京）2011 级本科生创新训练项目，编号：Y20131324。

第一作者简介：张香兰（1968—），女，博士，教授，研究方向为多孔炭和硅材料的制备、烟气脱硫脱硝等。电话：13521703609， E-mail：zxl311@sohu.com。