Viscosity of Non-aqueous and Aqueous Alumina Slurry for Tape Casting

Abstract

This paper reports shear rate dependence of the viscosity and relative viscosity of highly concentrated non-aqueous and aqueous slurries used for tape casting of the alumina sheet by a doctor blade method.The non-aqueous and aqueous slurries containing 28-35 vol% and 24-29 vol%alumina, respectively, were prepared by ball milling for this work.Approximate equations, derived from the Dougherty-Krieger-equation, logη_r,=αφand logη_r=αφ+(α/2φ_m)φ², are both fitted to the data measured quite well.