| 摘要 |
PURPOSE:To make it possible to sinter a dielectric ceramic composition having a high dielectric constant, low dielectirc loss and temperature coefficient of electrostatic capacity, and usable for a compact layered capacitors, etc., at low temperature and provide a dielectric filter using the composition and a copper as an inner conductor and give a method to manufacture the filter. CONSTITUTION:Using a BaTiO3-Nd2O3-Sm2O3 type and a SiO2-Pb0-CaO-B2O3-Na2 O-MgO-K2O type and limiting ratio of each component, dielectric constant as high as at least 10, high Q, high specific resistionty and low temperature coefficient of electrostatic capacity are achieved even by sintering the composition at temperature as low as highest 1000 deg.C at which copper is not oxidized. Also, using the composition and CuO as a starting raw material for a conductor part, an economical and highly reliable dielectric filter is obtained. |
