Density Determination of Powders by Liquid Displacement Methods.

Abstract

The densities of a number of powders were determined by liquid pycnometry and flotation as well as the more usual method of gas pycnometry. Replicate samples showed more variation when determined by liquid methods. Howeverlarge differences between results obtained from liquid and from gaseous methods were not obtained. The significance of these differences in terms of powder compression and porosity calculations was assessed. The sample size and degree of ultrasonic agitation was shown to affect the value of density obtained by liquid pycnometry.