Coating processes – Electrical product produced – Welding electrode
Patent
1980-08-13
1982-04-27
Morgenstern, Norman
Coating processes
Electrical product produced
Welding electrode
427105, 427124, 427125, 427237, 427238, 427250, 427255, 427309, 427314, 204195S, 118724, 118726, 156637, 156667, B05D 512
Patent
active
043271227
ABSTRACT:
A method of evaporating an adherent metal electrode coating onto a surface of the zirconia exhaust gas oxygen sensor body. The zirconia is heated to an elevated temperature and the electrode metal evaporated onto the zirconia surface from an adjacent helix. The helix conforms to the zirconia surface and has electrode metal distributed throughout its length. After deposition at a rate of about 0.5-1.0 micrometers per minute is terminated, the zirconia is maintained at the elevated temperature for a few minutes and then slowly cooled for exposure to ambient conditions. Evaporation is from a conforming, closely spaced helix that also preheats the sensor body.
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patent: 3463663 (1969-08-01), Chopra
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patent: 3804059 (1974-04-01), Streel
patent: 3978006 (1976-08-01), Topp et al.
patent: 4135012 (1979-01-01), Su
Powell et al., Vapor Deposition, John Wiley and Sons, New York, N.Y., .COPYRGT.1966, pp. 606-609, 222, 225.
Bueker Richard
General Motors Corporation
Morgenstern Norman
Wallace Robert J.
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