| 摘要 |
PROBLEM TO BE SOLVED: To provide an unreducing porcelain material of long acceleration life period of insulation resistance wherein, a laminated porcelain capacitor whose internal electrode is of such base metal as Ni is used, sintered at 1300 deg.C or below with small capacity temperature factor, arbitrarily controllable within a range -150 to +150 ppm/ deg.C, a specific resistance at 25 deg.C of 1×10<13> Ωcm or more, with less frequency dependence on dielectric constant and dielectric loss tangent (tanδ). SOLUTION: With a main component represented as [(CaXSr1- X)O]m [(TiYZr1- Y) O2 ], the value of X, Y, and m are respectively represented as 0<=X<=1, 0<=Y<=0.10, 0.75<=m<=1.04 (main component), and 0.2-5 mol.% (if Mn oxide is reduced to MnO), 0.1-10 mol.% (if Al oxide is reduced to Al2 O3 ) (sub- component), and while represented as [(BaZCa1- Z)O]VSiO2 , Z and V, being 0<=Z<=1 and 0.5<=V<=4.0, are in the range 0.5-15 mol.%. |
