Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1993-02-26
1994-12-13
Ryan, Patrick J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428377, 428380, 428389, 428381, 428400, 174110A, B32B 900, B32B 1800, H01B 700
Patent
active
053728866
ABSTRACT:
An insulated wire is suitable for use as a distribution wire, a wire for winding a coil or the like, which is used in a high-vacuum environment or in a high-temperature environment such as a high vacuum apparatus or a high temperature service apparatus. The insulated wire has a base material (1) forming a substrate, a chromium oxide CrO.sub.3-x containing intermediate layer (2) on the substrate, and an oxide insulating layer (3) on the intermediate layer. The base material (1) is an electrical conductor. The chromium oxide containing layer (2) is so formed that the ratio of oxygen to chromium O/Cr is not less than 0.5 but less than 1.5 to avoid the formation of chromic oxide Cr.sub.2 O.sub.3 which reduces the adhesive bonding strength. The oxide insulating layer (3) is formed by applying a precursor solution of a metallic oxide onto the chromium oxide containing layer (2) by a sol-gel method or an organic acid salt pyrolytic method. This insulated wire exhibits a high heat resistance and insulation ability as well as excellent flexibility, and does not provide any gas adsorption source when the wire is used in a vacuum device.
REFERENCES:
patent: 2495630 (1950-01-01), Dorst
patent: 3109053 (1963-10-01), Ahearn
patent: 5091609 (1992-02-01), Sawada et al.
Journal of Materials Science No. 12, (1977) pp. 1203-1208 (copy in parent case).
ISO468-1982 Surface Roughness Standard (copy in parent case).
Inazawa Shinji
Sawada Kazuo
Yamada Kouichi
Fasse W. F.
Fasse W. G.
Gray Jill M.
Ryan Patrick J.
Sumitomo Electric Industries Ltd.
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