Composition for ceramic substrate and substrate

Stock material or miscellaneous articles – Composite – Of quartz or glass

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428901, 501 32, B32B 1500, C03C 100

Patent

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047770929

ABSTRACT:
A composition for a ceramic substrate comprising from 30 to 70% by weight of glass powder, from 28 to 70% by weight of refractory filler powder and an oxidizing agent, said glass powder consisting essentially of from 38 to 48% by weight of SiO.sub.2, from 1 to 8% by weight of Al.sub.2 O.sub.3, from 0 to 10% by weight of MgO, from 18 to 28% by weight of BaO, from 1 to 8% by weight of CaO, from 0 to 15% by weight of SrO, from 0.5 to 15% by weight of B.sub.2 O.sub.3, from 0 to 20% by weight of PbO, from 10 to 20% by weight of ZnO, from 0 to 7% by weight of TiO.sub.2 plus ZrO.sub.2 and from 0 to 5% by weight of Li.sub.2 O plus Na.sub.2 O plus K.sub.2 O, and said refractory filler powder comprising from 20 to 60% by weight of alumina, from 0 to 40% by weight of zircon, from 0 to 30% by weight of cordierite and from 0 to 30% by weight of forsterite.

REFERENCES:
patent: 2898395 (1959-08-01), Schurecht
patent: 4133690 (1979-01-01), Muller
patent: 4593006 (1986-06-01), Takabatake et al.
patent: 4618590 (1986-10-01), Baudry

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