Measurement of the diffuse double-layer forces between zirconia and α-alumina

Atomic force microscopy measurements were carried out between zirconia and α-alumina colloids over a wide pH range and in 1×10−4 M sodium chloridel aqueous solution. The electrophoretic mobility and potentiometric titrations were performed on the zirconia and α-alumina colloid samples, respectively. The electrical double-layer forces measured by atomic force microscopy were related to the zeta potentials and the isoelectric point of the both mineral dioxides, determined from the electrophoretic mobility measurements.