Interface Adsorption Properties of Y-TZP Aqueous Suspensions

Abstract

Abstract: Yttria stabilized tetragonal zirconia(Y-TZP) suspensions were prepared by employing polyelectrolytes as dispersant. Isotherm adsorption
and electrokinetic measurement of the suspensions suggested that surface chemistry of the particles was affected by such adsorbed polymers as
NH_4PAA and the optimum concentration of the polymer dispersant was about 2wt%. The isoelectric point(IEP) of the suspension was shifted to low pH value.
Interactions between particles were measured by using atomic force microscopy(AFM). The polymer adsorbed particles showed enhanced repulsive force 3 times higher
than that of unadsorbed Y-TZP particles. Scanning auger microscopy(SAM) results showed that surface bond structure of particles was influenced by adsorbed polymers. Rheology tests also revealed that the viscosity reached its nadir
at saturated adsorption point, which was consistent with the conclusion drawn from isotherm adsorption.

Key words: zirconia, suspensions, dispersant, adsorption, interaction

CLC Number:

O648

WANG Jun,GAO Lian,SUN Jing. Interface Adsorption Properties of Y-TZP Aqueous Suspensions[J]. Journal of Inorganic Materials.

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Interface Adsorption Properties of Y-TZP Aqueous Suspensions

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