METHOD FOR PREPARING MONOLITHIC HYDRATED ALUMINAS AND COMPOSITE MATERIALS

摘要

Process (P1) for producing monolithic alumina hydrate (I) comprises cleaning the surface of a piece of aluminum or aluminum alloy, coating the surface with a mercury amalgam of a noble metal, and exposing the coated surface to a wet oxidizing atmosphere. Independent claims are also included for: (1) process (P2) for producing monolithic amorphous alumina by heating (I); (2) process (P3) for producing monolithic crystalline alumina (II) in delta, gamma, theta, kappa, kappa' or alpha form by heating (I); (3) process (P4) for producing a monolithic aluminate (III) by impregnating (I) or (II) with a metal compound and heating the product to decompose the metal compound and form the aluminate; (4) process (P5) for producing a composite material comprising (I), (II) or (III) and another compound or element (IV) by impregnating (I), (II) or (III) with a precursor of (IV) and then forming (IV).