Glass-ceramic articles having metallic surfaces

Details Glass-ceramic articles having metallic surfaces Glass-ceramic articles having metallic surfaces

1982-02-16

1983-11-08

McCamish, Marion

Stock material or miscellaneous articles

Composite

Of quartz or glass

428432, 428450, 428469, 428702, 501 3, 501 59, 501 69, 252508, 252509, 252514, C03C 322

Patent

active

044142811

ABSTRACT:
This invention is directed to the production of composite articles composed of a substrate consisting of a machinable glass-ceramic and an integral, electrically-conductive surface layer consisting of metallic copper and/or silver. The inventive articles are prepared by heat treating precursor glass bodies containing copper and/or silver ions to grow fluormica crystals therein, thereby producing glass-ceramics, and to cause migration of the copper and/or silver ions to the surface thereof which are reduced to metallic copper and/or silver via heat treating in a reducing atmosphere. Where desired, holes can be bored, drilled, or punched into the glass-ceramic prior to exposure to the reducing heat treatment such that, upon heat treatment in a reducing environment, the sides of the holes will become metal plated.

REFERENCES:
patent: 3420645 (1969-01-01), Hair
patent: 3464806 (1969-09-01), Seki et al.
patent: 3756838 (1973-09-01), Beall
patent: 3802892 (1974-04-01), Pirooz
patent: 3892904 (1975-07-01), Tanaka

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