DIELECTRIC CERAMIC AND CAPACITOR

文件类型：PDF文档
文件大小：1527K
Disclosed is a dielectric ceramic having crystal grains mainly composed of barium titanate and an intergranular phase formed among the crystal grains. The dielectric ceramic contains certain amounts of manganese and at least one rare earth element (RE) selected from magnesium, gadolinium, terbium, dysprosium, holmium and erbium, in terms of oxides, per 1 mole of barium constituting the barium titanate. The dielectric ceramic also contains a certain amount of yttrium in terms of oxides, per 100 parts by mass of the barium titanate. The crystal grains have an average grain size of 0.05-0.2 μm. By using the dielectric ceramic as a dielectric layer, there can be obtained a capacitor having high capacity and stable capacitance temperature characteristics.