Patent ID: 8263230

Claim:
A ceramic composition comprising 24 to 40 weight % of a B 2 O 3 —SiO 2 -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 B 2 O 3 is 4 to 17.5 weight %, the SiO 2 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 Al 2 O 3 ; 46 to 75.4 weight % of at least one of SrTiO 3 and CaTiO 3 ; 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.