H - Electricity – 01 – J
Patent
H - Electricity
01
J
117/77
H01J 9/14 (2006.01) C23C 18/31 (2006.01)
Patent
CA 1176509
PHD 80.039 6 12.2.1981 ABSTRACT: "Method of blackening steel components, in particular for cathode ray tubes". An adhering bismuth layer is provided on the steel components by electroless plating in a bismuth salt dispersion or bismuth salt solution. The steel components thus coated are heated in an oxidizing atmosphere, for example in air, at temperatures between 350 and 650 C for such a period of time that a black layer is formed on the surface of the bismuth-coated parts. A high thermal emis- sion power of the surface of the steel components in the overall infrared wavelength range from 1 to 30 µm and simultaneously a very high electron reflection is obtained.
373389
Comberg Albert
Panstruga Karl H.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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