초록 ▼

Multiphase ceramic materials for use in multilayered device fabrication may be fabricated by providing novel glassy precursor materials of a preferred composition, with operable amounts of a non-glassy filler materials. The combined materials are fired at appropriate temperatures, so that a non-glas

Multiphase ceramic materials for use in multilayered device fabrication may be fabricated by providing novel glassy precursor materials of a preferred composition, with operable amounts of a non-glassy filler materials. The combined materials are fired at appropriate temperatures, so that a non-glassy anorthite type phase is formed. Material so fabricated is formed in a self-limiting process, in that reaction between the glassy precursor material and the non-glass filler material is terminated when one constituent of the glassy precursor material is fully consumed. The materials of the instant invention, fabricated according to the method disclosed herein, demonstrate excellent dielectric constant, and electrical loss characteristics.

대표청구항 ▼

[ What is claimed is:] [1.] A ceramic composition prepared by a process comprising the steps of:providing a mixture comprising about 30-70 wt. % of a glassy precursor material comprising about 35-67 wt. % SiO.sub.2, about 10-25 wt % B.sub.2 O.sub.3, about 5-25 wt. % of at least one of MgO, CaO, SrO,

[ What is claimed is:] [1.] A ceramic composition prepared by a process comprising the steps of:providing a mixture comprising about 30-70 wt. % of a glassy precursor material comprising about 35-67 wt. % SiO.sub.2, about 10-25 wt % B.sub.2 O.sub.3, about 5-25 wt. % of at least one of MgO, CaO, SrO, and BaO and about 2-10 wt. % of at least one of K.sub.2 O, Na.sub.2 O, and Li.sub.2 O; and about 30-70 wt. % of a filler material comprising Al.sub.2 O.sub.3 ;providing at least one modifier selected from the group consisting of TiO.sub.2, SrTiO.sub.3 and CaTiO.sub.3 ; andsintering the glassy precursor, filler and modifier at temperatures of about 875.degree. C.;wherein said glassy precursor said filler and said react in a self-limiting reaction such that when at least one of the said CaO, MgO, SrO, and BaO are consumed and 25 wt % to less than 100 wt % of the SiO.sub.2 is consumed to form at least one high-Q alkaline-earth-metal-oxide-aluminosilicate phase; andwherein the ceramic composition comprises:a high-Q glass phase at least one modifier selected from the group consisting of TiO.sub.2, SrTiO.sub.3 and CaTiO.sub.3,at least one high-Q alkaline-earth-metal-oxide-aluminosilicate phase, anda high-Q Al.sub.2 O.sub.3 phase.