The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1993
Filed:
Apr. 17, 1992
Center For Innovative Technology, Herndon, VA (US);
Abstract
Metal organic chemical vapor deposition (MOCVD) is used to form a layer of a metal oxide on the surfaces and within the pores of a porous ceramic material. The metal oxide is formed from one or more inexpensive metal organic precursors which permeate the pores of the substrate as a vapor. Surface reactions on the heated substrate convert the metal organic precursors to their metal oxide. The technique has particular utility in creating catalysts with very large surface areas and in providing a protective coating on ceramic materials that prevents or reduces damage from hostile environments. In a preferred embodiment, aluminum isopropoxide, [(CH.sub.3).sub.2 CHO].sub.3 Al, and titanium ethoxide, Ti(C.sub.2 H.sub.5 O).sub.4, are used simultaneously or successively as precursors to generate a Al.sub.2 TiO.sub.5 coating on a porous ceramic substrate such as SiC or porous refractory cement candle filters.