Influence of the composition of CexZr1–xO2 hydrosols on their rheological properties

Ce x Zr1- x O2 hydrosols with different particle compositions ( x = 0.8, x = 0.5, x = 0.2) were synthesized, for which flow curves were measured in a wide range of concentrations and pH values of the dispersion medium. It was found that under the conditions studied, CexZr1-xO2 hydrosols behave like Newtonian liquids. In this case, the Einstein equation is observed in a fairly narrow range of concentrations of the dispersed phase. Based on data on the density of particles and their effective volume concentration, the influence of surface layers on the increase in the viscosity of hydrosols was assessed. The influence of both primary and secondary electroviscous effects was established, whose contribution to the measured viscosity of hydrosols depends on the concentration of the dispersed phase, the pH of the dispersion medium, and the composition of the particles.