Dielectric ceramic and ceramic electronic component
AssigneeMurata Manufacturing Co., Ltd.
InventorKoichi Banno
Life of this patent
Estimating the term…
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 TiO2 to 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.
Claims20
A dielectric ceramic comprising:
- a primary constituent represented by general formula (1):
- a[(SrbCa1-b)TiO3]-(1-a)[Bi2O3n. TiO2]
- (wherein a and b indicate molar amounts, and n indicates a molar ratio of TiO2 to Bi2O3);
- and
- a secondary constituent represented by general formula (2):
- xMgTiO3-yMnOm-zLn2O3
- (wherein x, y, and z indicate weight amounts per 100 parts by weight of the primary constituent, m is 1 to 2, and Ln is at least one element selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho and Er), and
- wherein a, b, n, x, y, and z satisfy the expressions
- 0.88≦a≦0.92,0.3≦b≦0.5,1.8≦n≦3,1≦x≦3,0.1≦y≦2, and0<z≦3.
Dependencies are inferred from the claim text.