A Highly Stable Nonaqueous Suspension for the Electrophoretic Deposition of Powdered Substances

Abstract

A higly stable nonaqueous suspension for the electrophoretic coating of alumina powders on double helical filaments has been developed. This suspension enables uniform coating in less than a second at a voltage of 300–600V with an average current density of about 1 mA/cm2. The suspension is composed of dispersing powders, acetone, nitrocellulose, and a small amount of strong base and strong acid. A variety of powders can be anodically deposited uniformly using the same composition. Successful results are obtained for , , , , , , , , , , and powders; for phosphors such as , , , , , , and ; and for metallic powders such as W, Mo, Ni, Al, Zn, and Ru.