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US 2011/0085280 A1Published application
Dielectric ceramic and laminated capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsKazuo Muto, Kohei Shimada
Life of this patent
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Abstract
A dielectric ceramic containing a BaTiO3 based material as its main constituent, and, as accessory constituents, a rare-earth element R(R is at least one selected from Nd, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Y), M (M is at least one selected from Mg, Mn, Ni, Co, Cu, Al, Mo, W, and V), SiO2, and CaO. Among crystal grains included in this dielectric ceramic, the ratio of the number of crystal grains 11 in which Si is present in solid solution is 5% or more.
Claims15
A dielectric ceramic comprising:
- a BaTiO3 based material as a main constituent, and R, M, and SiO2 as accessory constituents,
- wherein R is at least one rare-earth element selected from Nd, Eu, Gd, Tb, Dy, Ho, Er, Yb, and Y,
- wherein M is at least one element selected from Mg, Mn, Ni, Co, Cu, Al, Mo, W, and V, and
- wherein among crystal grains included in the dielectric ceramic, a ratio of a number of Si solid solution crystal grains is 5% or more.
1 more element
Dependencies are inferred from the claim text.