US 8,263,230 B2 · Ceramic composition, ceramic green sheet, and ceramic electronic component

Abstract

A ceramic composition is prepared to contain a B2O3—SiO2—Al2O3-MO based glass composition (M: Ca, Mg, Sr and/or Ba, B2O3: 4 to 17.5 weight %, SiO2: 28 to 50 weight %, Al2O3: 0 to 20 weight %, and MO: 36 to 50 weight %): 24 to 40 weight %, SrTiO3 and/or CaTiO3: 46 to 75.4 weight %, CuO: 0.1 to 5.0 weight %, CaO: 0.5 to 7.0 weight %, and MnO, ZnO and/or CoO: 10 weight % or more (however, including 0% by weight). The ceramic composition is subjected to firing to produce a ceramic sintered body, and obtain a composite LC component including the ceramic sintered body. While suppressing the shrinkage behavior during firing, dielectric properties can be improved dramatically as compared with conventional cases, and moreover reliability can be ensured.

Claims20

Dependent claims

A ceramic composition comprising

24 to 40 weight % of a B2O3—SiO2-MO based glass composition in which M represents at least one member selected from the group consisting of Ca, Mg, Sr, and Ba, and in which the B2O3 is 4 to 17.5 weight %, the SiO2 is 28 to 50 weight %, the and the MO is 36 to 50 weight %, and in which the glass composition contains 0 to 20 weight % of Al2O3;
46 to 75.4 weight % of at least one of SrTiO3 and CaTiO3;
0.1 to 5.0 weight % of a Cu oxide in terms of CuO;
0.5 to 7.0 weight % of a Ca oxide in terms of CaO;
and
up to 10 weight % of metal oxide in which the metal is at least one member selected from the group consisting of Mn, Zn, and Co, respectively in terms of MnO, ZnO, and CoO.

3 more elements

Dependencies are inferred from the claim text.

Ceramic composition, ceramic green sheet, and ceramic electronic component

Life of this patent

Ceramic composition, ceramic green sheet, and ceramic electronic component

Life of this patent

Abstract

Claims20