Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1985-12-24
1987-11-17
Beck, Shrive P.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427113, 427 78, B05D 110
Patent
active
047073799
ABSTRACT:
A protective layer for carbonaceous materials, especially graphite electrodes, applied by plasma-coating method comprised of 65-98 w/o of metal aluminum, 1-20 w/o of combined metal silicon with silica (SiO.sub.2) and up to 15 w/o of oxygenous compounds of aluminum. The resistivity of the layer is 0.07.10.sup.-6 ohm.m up to 0.3.10.sup.-6 ohm.m at 20.degree. C. and 0.12.10.sup.-6 ohm.m up to 0.7.10.sup.-6 ohm.m at 400.degree. C.
The method of producing the protective layer comprises the following steps of directing a plasma flame of a water stabilized plasma burner toward the carbonaceous material, and feeding into a plasma flame a particulate composition comprising between about 85 w/o to about 99 w/o of metallic aluminum having a particle size of between about 0.09 to about 0.180 mm and between about 1 to about 15 w/o of silicon having a particle size of between about 0.07 to about 0.165 mm.
REFERENCES:
patent: 3140380 (1964-07-01), Jensen
patent: 3348929 (1967-10-01), Valtscheu et al.
patent: 3669723 (1972-06-01), Parr et al.
patent: 4386112 (1983-05-01), Eaton et al.
Forejt Antonin
Kasik Pavel
Macku Ales
Neufuss Karel
Beck Shrive P.
Ceskoslovenska akademie ved
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