| 摘要 |
PURPOSE:To obtain the title capacitor wherein its resistivity and its reliability are ensured and its capacity can be made large by a method wherein the average particle size of crystal particles in a region close to an electrode layer of a dielectric porcelain layer is made smaller than the particle size of crystal particles in the intermediate region of the electrode layer. CONSTITUTION:The title capacitor is provided with the following: a dielectric porcelain layer; a first electrode layer arranged on one side of the porcelain layer; and a second electrode layer arranged on the other side of the porcelain layer. In such a laminated porcelain capacitor, the average particle size of crystal particles in a region close to the electrode layer of the dielectric porcelain layer is made smaller than the particle size of crystal particles in the intermediate region of the electrode layer. For example, when a porcelain material in which Nd2O3 and MnO in very small quantities have been added to a main component composed of BaTiO3 and BaZrO3 is used as a dielectric, the average particle size of crystal particles of porcelain layers 1a;, 1b' in the center between electrode layers 3', 3a', 3b' is set at 5 to 6mum, and the average particle size of crystal particles of porcelain layers 4', 2a', 4a', 2b' on their both sides is set at 0.2 to 0.4mum.
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