GLASS CERAMIC MASS AND USE THEREOF

摘要

The invention relates to a glass ceramic mass containing at least one oxide ceramic containing barium, titanium and at least one rare earth metal Rek; a nd at least one glass material containing at least one oxide with boron, at lea st one oxide with silicon and at least one oxide with at least one bivalent met al Me2+. The glass ceramic mass is characterised in that the glass material contains at least one oxide with bismuth, especially bismuth trioxide. The oxide ceramic is especially a microwave ceramic of formula BaRek2Ti4O12, Rek being neodymium or samarium. The composition of the oxide ceramic remains essentially constant during the sintering of the glass ceramic, enabling the material properties of the glass ceramic mass, such as permittivity (20 - 80 ), quality (800 - 5000) and Tkf (.plusmn. 20 ppm/K) to be specifically predetermined. The glass ceramic mass is characterised by a densification temperature of under 910 ~C and can is therefore suitable for use in LTCC (l ow temperature cofired ceramics) technology, for integrating a passive electric al component in the volume of a multilayered ceramic body. Silver in particular can be used as an electroconductive material in this case.