MAGNETIC CHARACTERIZATION OF METAL-PARTICLE PIGMENT DISPERSIONS-II

In this study we report on our continued investigation of particulate dispersion characterisation using magnetic measurement techniques. A fully automated vibrating sample magnetometer (VSM) was used to measure the reverse demagnetisation remanence curves of a 'wet' metal particle dispersion as a function of dispersion milling time. Theoretical interpretation of the data using a Brownian motion relaxation mechanism indicates that increases in milling time significantly reduce the mean size of the particle aggregates.