The ceramic capacitor in accordance with the present invention is fabricated by employing a dielectric ceramic composition in forming dielectric layers thereof, wherein the dielectric ceramic composition contains an oxide of Ba and Ti, an oxide of Re (Re used herein represents one or more rare-earth elements selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Tb and Y) and one or more oxides selected from oxides of Mn, V and Cr, wherein the amount of the oxide of Ba and Ti is 100 mol % in terms of BaTiO.sub.3, the amount of the oxide of Re is 0.25 to 1.5 mol % in terms of Re.sub.2 O.sub.3 and the amount of one or more oxides of Mn, V or Cr is 0.03 to 0.6 mol % in terms of Mn.sub.2 O.sub.3, V.sub.2 O.sub.5, Cr.sub.2 O.sub.3, respectively, wherein the ratio of Ba to Ti ranges between 0.970 and 1.030.
In a dielectric ceramic composition comprising: 100 mol % of an oxide of Ba, Ti and Zr; 0.25 to 1.5 mol % of an oxide of Re, Re representing one or more elements selected from the group consisting of Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Y; 0.1 to 0.4 mol % of an oxide of Mg; and 0.03 to 0.6 mol % of oxides of one or more elements selected from the group consisting of Mn, V and Cr, the content of the oxide of the Ba, Ti and Zr is calculated by assuming that the oxide thereof is Ba(Ti.sub.1-x Zr.sub.x)O.sub.3 ; the contents of the oxides of the Re and Mg being calculated by assuming that the oxides thereof are Re.sub.2 O.sub.3 and MgO, respectively; the contents of the oxides of the Mn, V and Cr being calculated by assuming that the oxides thereof are Mn.sub.2 O.sub.3, V.sub.2 O.sub.5 and Cr.sub.2 O.sub.3, respectively. A ratio of Ba/(Ti.sub.1-x Zr.sub.x) ranges from about 1.000 to about 1.010 and x in Ti.sub.1-x Zr.sub.x ranges from about 0.05 to about 0.26.
A dielectric ceramic composition having high static capacitance and high dielectric constant and satisfying X7R characteristics and a multilayer ceramic capacitor using the same is provided. The dielectric ceramic composition comprises barium titanate as a main component, and comprises magnesium oxide, dysprosium oxide, barium oxide, calcium oxide, and vanadium oxide, as subcomponents, wherein magnesium oxide converted into MgO is 1 to 3 mol, dysprosium oxide converted into Dy.sub.2 O.sub.3 is 1 to 5 mol, total of barium oxide and calcium oxide converted into BaO and CaO, respectively, is 0.1 to 5 mol, and vanadium oxide converted into V.sub.2 O.sub.5 is 0.01 to 0.1 mol, when barium titanate converted into BaTiO.sub.3 is 100 mol.
A production method of a dielectric ceramic composition having a step of firing dielectric material including a main component ingredient and a subcomponent ingredient, wherein said main component ingredient before firing is barium titanate ingredient powder having the perovskite type crystal structure expressed by ABO.sub.3, and a ingredient powder having a ratio A/B of A site components and B site components of 1.006.ltoreq.A/B.ltoreq.1.035 and the specific surface area of 8 to 50 m.sup.2/g is used. According to the invention, a dielectric ceramic composition having preferable electric characteristics and temperature characteristic can be provided even in the case of being composed of fine particle and a capacitor made to be a thin layer.
