Dispersion behavior of hydrophilic calcium carbonate particles and hydropho
bic talcum particles in water, ethanol and kerosene media has been studied
by sedimentation analysis. It is found that the dispersion of fine particle
s complies with the principle of polarity compatibility. That is to say, th
e dispersion effect will be improved when surface polarity of particles is
similar to that of liquid media. The adsorption models of oleic acid on the
surface of particles in water and ethanol are proposed.