Process for coating a substrate with zinc oxide and uses for coated substrates

  • US 5,306,522 A
  • Filed: 08/12/1991
  • Issued: 04/26/1994
  • Est. Priority Date: 03/24/1986
  • Status: Expired due to Fees
First Claim
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1. A process for coating an inorganic three dimensional substrate with doped zinc oxide comprising:

  • contacting an inorganic three dimensional substrate which includes external surfaces and shielded surfaces which are at least partially shielded by other portions of said substrate with a composition comprising a zinc oxide-forming compound other than zinc oxide at conditions effective to form a zinc oxide-forming compound containing coating on at least a portion of said substrate;

    forming a liquidus zinc oxide forming compound containing coating on at least a portion of the three dimensions of said substrate including the shielded surfaces of said substrate;

    contacting said substrate with at least one dopant forming component at conditions effective to form a dopant component-containing coating on at least a portion of said substrate including at least a portion of the three dimensions of said substrate including the shielded surfaces of said substrate;

    said contacting being initiated at least prior to the substantially complete oxidation of said zinc oxide forming compound to zinc oxide andcontacting said substrate having said zinc oxide forming compound containing coating and said dopant component-containing coating thereon with an oxidizing agent at conditions effective to convert said zinc oxide forming compound to zinc oxide and form a doped zinc oxide coating on at least a portion of said three dimensions of said substrate including the shielded surfaces of said substrate.

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