DIELECTRIC MATERIAL AND METHOD OF PRODUCING THE SAME

PURPOSE : Provided are a dielectric material which can be co-fired with a conductor having a high conductivity such as silver, copper, etc., has a large dielectric constant and is suppressed in the decrease of unload Q due to the mixing of glass, its preparation method and an LC filter containing the dielectric material. CONSTITUTION : The dielectric material comprises 100 parts by weight of a composition represented by aBaO·bTiO2·cREO3/2·dBiO3/2 (wherein a, b, c and d represent a molar ratio, a+b+c+d=1, 0.09<=a<=0.16, 0.54<=b<=0.62, 0.20<=c<=0.34, and 0<=d<=0.10; and RE is a rare earth metal); and 5-50 parts by weight of a BaO·ZnO·B2O3·SiO2-based glass represented by kBaO·lZnO·mB2O3·nSiO2 (wherein k, l, m and n represent percent, k+l+m+n=100 (wt%), 25<=k<=55, 5<=l<=30, 15<=m<=35, and 5<=n<=30). Preferably the dielectric material has a dielectric constant of 40 or more. © KIPO 2005