PURPOSE: To provide a catalyst carrier wherein alumina coating is not separated from the carrier due to thermal shock under operating conditions by applying coating of activated alumina powder to the surface of a metal substrate by dry-powder electrostatic method to improve the adhesion between a metal honeycomb and the alumina coating layer.
CONSTITUTION: Powder of activated alumina containing activated alumina or rare earth metal oxides is applied to the surface of a metal substrate from the end of a gun for use in electrostatic coating, while voltage is being applied to said powder. The metal substrate is formed into a corrugated shape or a three dimensional construction, following which said activated alumina is impregnated with aqueous solutions of rare earth metal salts so that the rare earth metal salts are thermally decomposed into rare earth oxides. In this manner, catalyst carriers for use in purification of waste gas having improved adhesion between a metal honeycomb and alumina coating layer can be provided.
NISHINO ATSUSHI
TANAHASHI ICHIRO
