Patent ID: 7592886

Claim:
A dielectric porcelain composition comprising: a first component represented by a formula of xBaO-yNd 2 O 3 -zTiO 2 -wBi 2 O 3 ; x, y, z, and w satisfying 12≦x≦16, 12≦y≦16, 65≦z≦69, and 2≦w≦5, provided that x, y, z, and w are molar ratios and x+y+z+w=100; a second component including, in weight ratio, 30 to 37 wt % of BaO, 33 to 46 wt % of SiO 2 , 8 to 12 wt % of La 2 O 3 , 3 to 7 wt % of Al 2 O 3 , 0 to 1 wt % of SrO, 0 to 10 wt % of Li 2 O, 0 to 20 wt % of ZnO, and 7 wt % or less of B 2 O 3 , a compounding ratio of the second component being 10 wt % to 30 wt % when a sum of the first component and the second component is 100; and a third component including 0.1 to 1 parts by weight of Li 2 O and 3 to 10 parts by weight of ZnO, relative to 100 parts by weight of the sum of the first component and the second component; wherein an average particle diameter of a dielectric mixed powder before firing is not greater than 0.9 μm, the dielectric mixed powder including a first powder component comprising the first component, a second powder component comprising the second component, and a third powder component comprising the third component; and the dielectric porcelain composition is a sintered body made by firing the dielectric mixed powder.