| 摘要 |
PURPOSE:To obtain a capacitor in which high dielectric constant is obtained with small grain size, thickness can be reduced, stability and reliability of insulation resistance are not deteriorated by reduced thickness, large mechanical strength the large product of the dielectric constant and breakdown strength voltage are provided by employing the capacitor made of a specific composition. CONSTITUTION:A main ingredient is represented by a general formula of (Sr1-x-yBaxMy)(Ti1-zM'z)alphaO3+betaMnO2 (where M is at least one kind selected from rare earth elements, M' is at least one kind selected from Nb, Ta and W, and at least one kind of M, M' is contained), x, y+z, alpha are respectively 0.40<x<=0.60, 0.0005<=y+z<=0.03, 1.001<=alpha<=1.010, and 0.0001<=beta<=0.004, its crystal grain boundaries are insulated by at least one kind of oxide of one selected from Cu, Bi, Pb, B and Si, and its maximum grain size is 50mum or less. Or, one or more kinds of SiO2 and Al2O3 may be added by 0-0.1wt.% as sub- ingredient to 99.9-100wt.% of the main ingredient. |
