Method of producing an insulating material for coating cathode heater elements
AssigneeInternational Standard Electric Corporation
InventorEberhard Weiss
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Abstract
A method of producing an aluminum oxide and tungstate powder for insulating cathode heaters includes mixing a finely divided aluminum oxide powder with ammonium tungstate, rinsing out excess ammonium tungstate, drying the mixture and heating in a nitrogen-hydrogen atmosphere to about 700.degree.C.
Claims5
A method of producing an electrical insulating material for coating cathode heater elements including mixing a finely divided aluminum oxide powder and ammonium tungstate, rinsing the mixture with a liquid, drying the resultant mixture, and heating the mixture in a nitrogen and hydrogen atmosphere to provide a fine powder of aluminum oxide and ammonium tungstate.
Dependencies are inferred from the claim text.