Patent ID: 8455381

Claim:
A ceramic material composition comprising: (a) about 10 to 45 percent by weight of a BaO—TiO 2 —ReO 3/2 ceramic composition, the ceramic composition being represented by xBaO-yTiO 2 -zReO 3/2 wherein x, y, and z each represent mole percent and 8≦x≦18, 52.5≦y≦65, and 20≦z ≦40, and x+y+z=100; and Re represents a rare-earth element; (b) about 5 to 40 percent by weight of alumina; and (c) about 40 to 65 percent by weight of a borosilicate glass composition containing about 4 to 17.5 percent by weight of B 2 O 3 , about 28 to 50 percent by weight of SiO 2 , 0 to about 20 percent by weight of Al 2 O 3 , and about 36 to 50 percent by weight of MO, wherein said alumina does not encompass any Al 2 O 3 which may be present in said borosilicate glass composition, wherein MO represents at least one compound selected from CaO, MgO, SrO and BaO, and wherein the combined content of the BaO—TiO 2 —ReO 3/2 ceramic composition of and the alumina is at least about 35 percent by weight whereby the ceramic composition has a relatively high dielectric constant at least 10 and has a resistance to insulation degradation signified by having an IR of greater than 5.