激光粒度仪在分析样品分散方法的比较

Comparison and Analysis on Samples Dispersing Methods for Application by Laser Diffraction Particle Size Analyzer

激光粒度仪测试粉体粒度中分散方法的选择尤为重要,对测量结果的影响很大。在湿法测试粉体粒度中,同一种粉体在不同的分散剂和分散媒中,因为不同的分散效果在实际的测量中粒度分布并不相同。选用了多组粉体样品分别用水、无水乙醇、汽油3种分散剂进行了测试比较分析。结果表明,在不影响实验结果的前提下,水为首选分散剂;其次为无水乙醇;最后为汽油。

The selection of dispersing methods is very important for testing particle size by using laser diffraction analyzer, which has great effects on the testing results. When testing particle size under the wet process, due to the different diffusion effects in different dispersants and disperse mediums for the same particle, the actual particle distribution is different. As a professional worker, it should take the accuracy of experiment, the simple and easy of operation and the lower cost of experiment into consideration. From this angle, this article selects three kinds of dispersing mediums, including water, absolute ethyl alcohol and petrol, to test various particle samples for comparison. The results show that on the promise of ensuring the validity of tests, water is the first choice as dispersing medium, absolute ethyl alcohol is the following and petrol is the last choice.