High-strength alumina ceramic product and method of forming
AssigneeElectric Power Research Institute, Inc.
InventorsJames E. Funk, Ira O. Knickerbocker
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Abstract
A high strength ceramic product especially adapted for electrical porcelain insulators and including alumina, clay, and flux (nepheline syenite or potassium feldspar). The alumina content is from 45 to 60% by weight of the ceramic body. The product is formed by conventional wet processing. By controlling the size of alumina and flux, a high modulus of rupture (in excess of 30,000 psi) is imparted to the fired ceramic product.
Claims8
The method of producing a high-strength ceramic body comprising the steps of comminuting alumina to break up essentially all agglomerates in excess of 20 microns, mixing said comminuted alumina, clay, and flux with water in sufficient quantity to form a plastic extrudable aqueous mass, said alumina comprising from about 45 to about 60% by weight of solids content of the mass, extruding said aqueous mass into the desired configuration, and drying and firing the mass to form a ceramic body.
The method of producing a high-strength ceramic body comprising the steps of mixing alumina, previously comminuted to break up essentially all agglomerates in excess of 20 microns, with clay, flux and water in sufficient quantity to form a plastic extrudable aqueous mass, said alumina comprising from about 45 to about 60% by weight of the solids content of the mass, extruding said aqueous mass into the desired configuration, and drying and firing the mass to form a ceramic body.
Dependencies are inferred from the claim text.