Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1996-07-26

1997-07-22

Jones, Deborah

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

C04B 3549

Patent

active

056503687

ABSTRACT:
A dielectric ceramic composition used for a ceramic capacitor for temperature compensation, a resonator and the like. The dielectric ceramic composition comprises a composite oxide containing, as metal elements, main components of (i) barium, (ii) rare earth elements such as neodymium (Nd) or Nd and Sm in combination, and (iii) elements of the Group IV of periodic table such as titanium (Ti) or Ti and Zr or Sn in combination, and an assistant component of manganese, wherein the main components comprise from 7.5 to 16.25 mol % of a barium oxide, from 16.75 to 23.75 mol % of an oxide of rare earth element, and from 67 to 71.66 mol % of an oxide of element of the Group IV reckoned as a molar composition of the ternary-component-based oxide, the manganese component is contained in an amount of from 0.01 to 0.5% by weight reckoned as MnCO.sub.3 with respect to the main components, and sodium component which is an impurity is contained in an amount of not larger than 0.10% by weight with respect to the whole amount.

REFERENCES:
patent: 4522927 (1985-06-01), Kashima et al.
patent: 5116790 (1992-05-01), Bruno et al.
patent: 5223462 (1993-06-01), Okawa
patent: 5244851 (1993-09-01), Takahashi et al.

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