FIELD: electricity.
SUBSTANCE: heating unit comprises a pipe of refractory material, a resistive ceramic-metal heater, placed on the outer surface of the pipe, having a zone of heating and current supply, which are made by plasma sputtering using a ceramic metal material containing from 10 to 30 wt % of the ceramic component. Only the heating zone is made by sputtering with the ceramic component. Also the method is proposed to manufacture a heating unit, in which first by a metal alloy they sputter the current supply zone, afterwards, a ceramic component is added to the alloy, and the heating zone is sputtered.
EFFECT: reduced electric losses in an electric heater, due to provision of even distribution of supplied current, its increased reliability.
2 cl, 1 dwg, 1 tbl
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