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Surface protection of porous ceramic bodies

  • US 5,702,761 A
  • Filed: 04/29/1994
  • Issued: 12/30/1997
  • Est. Priority Date: 04/29/1994
  • Status: Expired due to Term
First Claim
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1. A method of protecting the surface of a porous ceramic body, comprising the steps of:

  • furnishing a body made of a first ceramic material and having porosity extending through at least a portion of the body adjacent to a first surface of the body;

    preparing a slurry of a mixture comprisinga ceramic powder made of a second ceramic material, anda binding agent comprising silica particles;

    impregnating the slurry into the first surface of the body so that substantially all of the slurry enters the porosity of the body and substantially none of the slurry resides on the first surface;

    drying the slurry in place within the porosity of the body to leave a mixture of ceramic powder and binding agent within the porosity; and

    firing the mixture of ceramic powder and binding agent to cause the binding agent to bind the ceramic powder to the interior of the porosity of the body.

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