Method of producing electrical resistor
AssigneeDanfoss A/S
InventorNiels Lervad Andersen
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Abstract
The invention relates to an electrical resistor with a SiC body, particularly for ignition or heating purposes, and to a method of producing such electrical resistor.
Claims5
A method of producing a silicon carbide electrical resistor which comprises forming under pressure a dense and substantially nonporous body consisting essentially of silicon carbide and free silicon, and etching a middle portion of said body with acid to remove essentially all the free silicon therefrom to thereby obtain a middle portion consisting essentially of a porous matrix of silicon carbide free of silicon and two end portions consisting essentially of silicon carbide and free silicon.
Dependencies are inferred from the claim text.