Dielectric pastes and tapes, and metal substrates coated therewi

Details Dielectric pastes and tapes, and metal substrates coated therewi Dielectric pastes and tapes, and metal substrates coated therewi

1998-02-09

1999-12-07

Speer, Timothy

Stock material or miscellaneous articles

Composite

Of quartz or glass

428469, 428471, 501 66, 501 69, 501 70, 501 73, 501 77, 165133, 165905, 219260, 338258, B32B 1700

Patent

active

059980362

ABSTRACT:
The present invention relates to dielectric materials which may be used in the manufacture of, e.g., low profile heaters. Such dielectric materials comprise at least about 50% of a glass composition having about 35-50% SiO.sub.2, about 30-40% of an alkaline earth metal oxide selected from the group consisting of CaO, MgO, and SrO, about 13--22% Al.sub.2 O.sub.3, and about 0-10% B.sub.2 O.sub.3, the percentages being weight percentages based on the weight of the total glass composition. Certain dielectric compositions of the disclosure have a linear thermal expansion coefficient in the range of about 6.0 to 9.0 ppm/.degree. C.

REFERENCES:
patent: 4618590 (1986-10-01), Baudry
patent: 4707458 (1987-11-01), Chyung
patent: 4897509 (1990-01-01), Holleran

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