Fabrication of highly particle-oriented alumina green compact from non-aqueous slurry

Abstract

A highly textured alumina green compact was obtained from well dispersed non-aqueous slurry by drying it in a high magnetic field. Compatibility of poly(vinyl butyral) (PVB) as a dispersant and organic solvent was optimized in order to control the conformation of PVB which affects the dispersion state by steric repulsion. A novel observation method was developed to analyze the structure of dispersed particles in concentrated slurry with an optical microscope. This method clarified that well dispersed slurry based upon good compatibility of PVB and organic solvent led to a highly particle-oriented green compact.