Glass ceramic materials having controllable temperature coeffici

Details Glass ceramic materials having controllable temperature coeffici Glass ceramic materials having controllable temperature coeffici

1981-08-05

1983-08-02

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

65 33, 361321, 501 41, 501 69, 501 73, 501134, 501136, C03C 322

Patent

active

043967213

ABSTRACT:
Glass ceramic materials having controllable temperature coefficients of dielectric constant or capacitance (TCC) are provided. The ceramic component of the composition possesses paraelectric properties at least over the temperature range of -55.degree. C. to 125.degree. C. and can be controllably crystallized from the glassy matrix initially formed. Heat treatment of the glass produces crystallization of the ceramic component and results in glass ceramic materials with controlled TCC values which are useful as capacitors, resonators, microwave substrates, and the like because of their low dielectric loss characteristics and temperature stability.

REFERENCES:
patent: 3113877 (1963-12-01), Janakirama-Rao
patent: 3195030 (1965-07-01), Herczog et al.
patent: 3615757 (1971-10-01), Herczog et al.
patent: 3649891 (1972-03-01), Lawless
patent: 3785833 (1974-01-01), Rapp
patent: 3787219 (1974-01-01), Amin
patent: 3852077 (1974-12-01), Rapp
patent: 4017317 (1977-04-01), Rapp

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