Low-temperature sinterable ceramic composition, and monolithic c

Details Low-temperature sinterable ceramic composition, and monolithic c Low-temperature sinterable ceramic composition, and monolithic c

1998-03-03

1999-12-07

Marcheschi, Michael

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 18, 501 17, 501 21, 501 65, 501 66, 501 77, 501 9, 428426, 428428, 428689, 428427, C03C 820, C03C 1400, C03C 1008

Patent

active

059983140

ABSTRACT:
Disclosed are a low-temperature sinterable ceramic composition comprising 100 parts by weight of an essential component composed of from about 60 to 85% by weight of cordierite and from about 15 to 40% by weight of glass, and not larger than about 25 parts by weight of TiO.sub.2, and a monolithic ceramic substrate comprising the composition. The composition can be sintered at relatively low temperatures, and the sintered substrate has a small thermal expansion coefficient and a small dielectric constant. The temperature-dependent variation in the electrostatic capacity of the substrate is small. Preferably, the glass component in the composition is composed of about 20 to 60% by weight of SiO.sub.2, about 30 to 50% by weight of B.sub.2 O.sub.3, about 5 to 30% by weight of MgO, 0 to about 15% by weight of Al.sub.2 O.sub.3, and about 1 to 5% by weight of R.sub.2 O in which R is an alkali metal.

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