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US 2009/0290285 A1Published application
Dielectric ceramic composition and monolithic ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorToshikazu Takeda
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AssigneeMurata Manufacturing Co., Ltd.
InventorToshikazu Takeda
Estimating the term…
A dielectric ceramic composition that is used for a monolithic ceramic capacitor, can be cofired with internal electrodes mainly composed of Ni at a temperature of 1200° C. or less, and has a high resistivity is provided. The dielectric ceramic composition is mainly composed of a tungsten bronze type complex oxide having a composition formula of (K1−xNax)Sr2Nb5O15 (wherein 0≦x<0.2) and further contains, as accessory components, 0.05 to 20 molar parts of R (wherein R is at least one selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) and 0.05 to 40 molar parts of M (wherein M is at least one selected from the group consisting of Mn, V, Li, Si, Ni, Cr, Co, Fe, Zn, Mg, and Zr) per 100 molar parts of the main component.
A dielectric ceramic composition comprising a tungsten bronze type complex oxide main component having a composition formula of ((K1−xNax)(Sr2−y−zBayCaz)mNb5O15 wherein 0≦x<0.2, y and z are each 0 to 1.4 and y+z≦1.4, 0.96≦m≦1.16, 0.05 to 20 molar parts per 100 molar parts of the main component of R wherein R is at least one member selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and 0.05 to 40 molar parts per 100 molar parts of the main component of M wherein M is at least one member selected from the group consisting of Mn, V, Li, Si, Ni, Cr, Co, Fe, Zn, Mg, and Zr.
Dependencies are inferred from the claim text.