Method of firing formed ceramic body
AssigneeNgk Spark Plug Co., Ltd.
InventorsAkira Morikawa, Yoshinori Narita
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Abstract
A method of firing a formed ceramic body containing organic components comprising the steps of covering a formed raw ceramic body containing organic components as its plasticizer and bonding agent, with a metal foil capable of being oxidized at a high temperature, and firing such a metal-foil covered ceramic body. The method is particularly useful for manufacturing a honeycomb-shaped catalyzer carrier made of ceramic having a number of holes for a device for purifying exhaust gases.
Claims6
A method of firing a formed raw ceramic body containing not less than 15% by weight of resinous organic components as a plasticizer and bonding agent and 100 parts by weight of inorganic components, comprising the steps of covering such a formed raw ceramic body with a metal foil capable of being oxidized at a high temperture, and firing said metal foil-covered raw ceramic body in an ordinary oxidizing atmosphere to sinter said body, said metal foil being gradually oxidized at a temperature greater than 250.degree. C said foil suppressing oxidiation of said organic components thereby preventing cracking of the ceramic body without lowering the firing temperature.
Dependencies are inferred from the claim text.