Patent Number: 6,617,273

Title: Non-reducing dielectric ceramic, monolithic ceramic capacitor using the same, and method for making non-reducing dielectric ceramic

Abstract: A non-reducing dielectric ceramic contains Ca, Zr and Ti as metallic elements and does not contain Pb. In a CuK.alpha. X-ray diffraction pattern, the ratio of the maximum peak intensity of secondary crystal phases to the maximum peak intensity at 2.theta.=25.degree. to 35.degree. of a perovskite primary crystal phase is about 12% or less, the secondary crystal phases including all the crystal phases other than the perovskite primary crystal phase. The non-reducing dielectric ceramic exhibits superior insulating resistance and dielectric loss after firing in a neutral or reducing atmosphere and high reliability in a high-temperature loading lifetime test and is useful for producing compact high-capacitance monolithic ceramic capacitors.

Inventors: Motoki; Tomoo (Izumo, JP), Naito; Masahiro (Yasu-gun, JP), Sano; Harunobu (Kyoto, JP)

Assignee: Murata Manufacturing Co., Ltd.

International Classification: C04B 35/462 (20060101); C04B 35/465 (20060101); H01G 4/12 (20060101); C04B 035/465 ()

Expiration Date: 09/09/2020