Abstract: A dielectric ceramic capacitor that has excellent reliability and particularly excellent life characteristics in a load test even when the thickness of a dielectric ceramic layer is reduced uses a dielectric ceramic as a dielectric ceramic layer in a laminated ceramic capacitor which is a substance containing, as the main component, (Ba, R)(Ti, V)O3 or (Ba, Ca, R)(Ti, V)O3 in which R is at least one selected from La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y, and in which both V and R are present uniformly in the main component particles.

Abstract: A laminated ceramic capacitor which provides favorable life characteristics, even when a high electric field strength is applied while dielectric ceramic layers are reduced in layer thickness to less than 1 ?m, contains a dielectric ceramic a compound represented by: (Ba1-x/100Cax/100)mTiO3 (0?x?20) as its main constituent, and as its accessory constituent, aMg-bSi-cMn-dR (R is at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y, and a, b, c, and d (part by mol) respectively satisfy the conditions of 0.1<a?20.0, 0.5<b?20.0, 0.1<c?10.0, and 1.0<d?30.0 with respect to 100 parts by mol of the main constituent). The average grain size is 20 nm or more and less than 100 nm for crystal grains in a sintered body obtained by firing the dielectric ceramic.

Abstract: A dielectric ceramic contains a BaTiO3-based compound as a main ingredient, and can be represented by the general formula: 100AmBO3+aNiO+bROn+cMOv+dMgO+eXOw where R represents a rare earth element such as Dy, M represents a metal element such as Mn, and X represents a sintering aid component containing Si. Ni is uniformly solid-solved in crystal grains, and the solid-solution region of the rare earth element in the crystal grains is an average 10% or less in terms of a cross section ratio. 0.96?m?1.030, 0.05?a?3, 0.1?b?1.5, 0.1?c?1.0, 0.1?d?1.5, and 0.05?e?3.5 are satisfied. A laminated ceramic capacitor has dielectric layers formed of the dielectric ceramic. As a result, a dielectric ceramic, and a laminated ceramic capacitor having excellent AC voltage characteristics, capable of keeping desired dielectric characteristics and excellent temperature characteristics, and having excellent withstand voltage and capable of ensuring reliability can be realized.

Abstract: A dielectric ceramic which is capable of achieving a laminated ceramic capacitor with high reliability, in particular, favorable lifetime characteristics in a load test, even when a dielectric ceramic layer is reduced in thickness contains one of (Ba, R)(Ti, Mn)O3 and (Ba, Ca, R)(Ti, Mn)O3 (R being La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and/or Y) as a main component, and M (M being Fe, Co, V, W, Cr, Mo, Cu, Al, and/or Mg) and Si as accessory components. The area of a region in which M is present is 10% or less on average of a cross section of each main component grain.

Abstract: A dielectric ceramic which is capable of achieving a laminated ceramic capacitor with high reliability, in particular, favorable lifetime characteristics in a load test, even when a dielectric ceramic layer is reduced in thickness, contains one of Ba(Ti, Mn)O3 and (Ba, Ca)(Ti, Mn)O3 as a main component, and R (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and/or Y), M (Fe, Co, V, W, Cr, Mo, Cu, Al, and/or Mg) and Si as accessory components. The area of a region in which at least one of R and M is present is 10% or less on average on a cross section of each main component grain.

Abstract: A dielectric ceramic represented by a general formula: 100BamTiO3+aROn+bMOv+cXOw (where R represents a rare earth element, M represents a predetermined metal element, and n, v, and w represent independently a positive number determined in accordance with the valences of the elements R and M and a sintering aid component X, respectively), and the solid solution regions of the secondary components in the main phase grains are 10% or less (including 0%) on average in terms of a cross-sectional area ratio. The sintering aid component X contains at least Si, and m, a, b, and c satisfy 0.995?m?1.030, 0.1?a?2.0, 0.1?b?3.0, and 0.1?c?5.0. In a monolithic ceramic capacitor, dielectric layers are formed from the above-described dielectric ceramic.

Abstract: A dielectric ceramic contains a BaTiO3-based compound as a main ingredient, and can be represented by the general formula: 100AmBO3+aNiO+bROn+cMOv+dMgO+eXOw where R represents a rare earth element such as Dy, M represents a metal element such as Mn, and X represents a sintering aid component containing Si. Ni is uniformly solid-solved in crystal grains, and the solid-solution region of the rare earth element in the crystal grains is an average 10% or less in terms of a cross section ratio. 0.96?m?1.030, 0.05?a?3, 0.1?b?1.5, 0.1?c?1.0, 0.1?d?1.5, and 0.05?e?3.5 are satisfied. A laminated ceramic capacitor has dielectric layers formed of the dielectric ceramic. As a result, a dielectric ceramic, and a laminated ceramic capacitor having excellent AC voltage characteristics, capable of keeping desired dielectric characteristics and excellent temperature characteristics, and having excellent withstand voltage and capable of ensuring reliability can be realized.

Abstract: A monolithic ceramic capacitor includes dielectric ceramic layers having a thickness of less than 1 ?m. When this thickness is t and the crystal grains of a dielectric ceramic of the layers have a mean diameter of r, a mean number N of grain boundaries satisfies 0<N?2 where N=t/r?1. The dielectric ceramic contains, as a main component, a perovskite type compound ABO3 (where A is Ba or Ba and at least one of Ca and Sr, B is Ti or Ti and at least one of Zr and Hf), and further contains Mn and V as auxiliary components. On the basis of 100 molar parts of the main component, the content of Mn is 0.05 to 0.75 molar parts, the content of V is 0.05 to 0.75 molar parts, and the total content of Mn and V is 0.10 to 0.80 molar parts.

Abstract: A dielectric ceramic represented by a general formula: 100BamTiO3+aROn+bMOv+cXOw (where R represents a rare earth element, M represents a predetermined metal element, and n, v, and w represent independently a positive number determined in accordance with the valences of the elements R and M and a sintering aid component X, respectively), and the solid solution regions of the secondary components in the main phase grains are 10% or less (including 0%) on average in terms of a cross-sectional area ratio. The sintering aid component X contains at least Si, and m, a, b, and c satisfy 0.995?m?1.030, 0.1?a?2.0, 0.1?b?3.0, and 0.1?c?5.0. In a monolithic ceramic capacitor, dielectric layers are formed from the above-described dielectric ceramic.