| 摘要 |
PURPOSE:To provide a dielectric ceramic composition having excellent dielectric breakdown strength by adding a specified quantity of niobium oxide as an auxiliary component to a main component having a specific composition comprising SrO, CaO, MgO, TiO2 and ZrO2. CONSTITUTION:To a main component by 100 parts by weight having a composition expressed by a composition formula of [(SrO)x(CaO)y(MgO)z[a[(TiO2)1-c(Zr2)c]b, where 1.00<=a/b<=1.06, 0.01<=c<=0.20, and x+y+z=1 (x, y, z are mole ratios), with x, y, z within a range of the mole ratios to enclose a, b, c, d in a three-way diagram by straight lines, niobium oxide as an auxiliary component is added by 0.001-0.006 mole parts as converted as Nb2O5. |
