Dielectric ceramic and ceramic electronic component

Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...

Reexamination Certificate

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C428S210000, C428S702000

Reexamination Certificate

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06946418

ABSTRACT:
A dielectric ceramic contains a primary constituent represented by general formula (1): a[(SrbCa1−b)TiO3]−(1−a)[Bi2O3.nTiO2] (wherein a and b indicate molar amounts, and n indicates a molar ratio of TiO2to Bi2O3), and a secondary constituent represented by general formula (2): xMgTiO3+yMnOm+zLn2O3(wherein x, y, and z indicate weight per 100 parts by weight of the primary constituent, m is 1 to 2, and Ln is at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, and Er), wherein a, b, n, x, y, and z satisfy the expressions 0.88≦a≦0.92, 0.30≦b≦0.50, 1.8≦n≦3.0, 1.0≦x≦3.0, 0.1≦y≦2.0, and 0<z≦3.0. A ceramic electronic component including the dielectric ceramic is also disclosed.

REFERENCES:
patent: 4482934 (1984-11-01), Hirota et al.
patent: 4746639 (1988-05-01), Sano et al.
patent: 03-097669 (1991-04-01), None

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