Patent ID: 7309669

Claim:
A dielectric sintered body obtained by sintering a dielectric material at 800 to 1,050° C., the dielectric material comprising a glass powder comprising Si, B and an alkali metal element, the glass being amorphous in sintering at a temperature of 1,050° C. or lower; and a ceramic filler comprising at least one member of SiO 2 , Al 2 O 3 and 3Al 2 O 3 ·2SiO 2 , and alkali metal element, wherein: (A) Si converted into SiO 2 , B converted into B 2 O 3 , the alkali metal element converted into A 2 O, wherein A represents an alkali metal element, Al converted into Al 2 O 3 in a case where Al is contained, and an alkaline earth metal element converted into EO, wherein E represents an alkaline earth metal element, in a case where the alkaline earth metal element is contained, all of which are contained in the glass, is defined to be 100 mole %, and (B) at least one member of SiO 2 , Al 2 O 3 and 3Al 2 O 3 ·2SiO 2 , the alkali metal element converted into A 2 O, and an alkaline earth metal element converted into EO, wherein E represents an alkaline earth metal element, in a case where an alkaline earth metal element is contained, all of which are contained in the ceramic filler, is defined to be 100 mole %, the alkaline metal converted into A 2 O in each of the glass and the ceramic filler is present in an amount of 0.5 mole % or less.