LAMINATED CERAMIC CAPACITOR

文件类型：PDF文档
文件大小：2137K
Disclosed is a laminated ceramic capacitor comprising a dielectric ceramic that is composed mainly of barium titanate and contains vanadium, magnesium, manganese, rare earth elements stated in the description, and terbium in respective proportions specified in the description. The crystal constituting the dielectric ceramic comprises a first group of crystals formed of first crystal grains having a calcium concentration of not more than 0.2 atomic% and a second group of crystals formed of second crystal grains having a calcium concentration of not less than 0.4 atomic%. The dielectric ceramic satisfies a requirement of C2/(C1 + C2) of 0.3 to 0.7 wherein C1 represents the area of the first crystal grains that appear on a polished surface of the dielectric ceramic; and C2 represents the area of the second crystal grains that appear on the polished surface of the dielectric ceramic. In an X-ray diffraction chart for the dielectric ceramic, the diffraction intensity of (200) plane attributable to cubic barium titanate is larger than the diffraction intensity of (002) plane attributable to tetragonal barium titanate. The Curie temperature is 95 to 105°C.