Electricity: conductors and insulators – Insulators – Through wall or plate
Patent
1982-09-20
1990-06-19
Kamm, William E.
Electricity: conductors and insulators
Insulators
Through wall or plate
H01B 1726
Patent
active
049355830
ABSTRACT:
Electrical articles are provided in which an electrical conductor having a particular coefficient of thermal expansion is bonded to an electrical insulator having substantially the particular coefficient of thermal expansion. The bonding is provided by a ceramic material having substantially the particular coefficient of thermal expansion. By "substantially" is meant a close approximation to the particular coefficient of thermal expansion.
The electrical conductor may be made from platinum or titanium or a titanium alloy and the electrical insulator may be made from an alloy of magnesium oxide, silica and aluminum oxide designated as Fosterite. The ceramic material may be partially amorphous and partially crystalline.
The bonding may be accomplished by disposing the ceramic material between the electrical conductor and the electrical insulator and by subjecting the ceramic material to a controlled amount of heat. The heat may be applied by a laser beam for an instant such as a fraction of a second. The controlled application of heat causes the ceramic material to flow in the space between the electrical conductor and the electrical insulator and to bond the electrical conductor and the electrical insulator.
REFERENCES:
patent: 2197511 (1940-04-01), Scharfnagel
patent: 2577576 (1951-12-01), Glickman et al.
patent: 3137766 (1964-06-01), Teague
patent: 3665239 (1972-05-01), Morinaud
patent: 3854827 (1974-12-01), Merz et al.
patent: 3977857 (1976-08-01), Mattox
patent: 4220814 (1980-09-01), Kyle et al.
patent: 4352951 (1982-10-01), Kyle
Kamm William E.
Roston Ellsworth R.
Schwartz Charles H.
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