Dielectric ceramic composition, method for manufacture...

Details Dielectric ceramic composition, method for manufacture... Dielectric ceramic composition, method for manufacture...

2007-04-17

2007-04-17

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

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

Reexamination Certificate

active

11152079

ABSTRACT:
A dielectric ceramic composition obtained by firing a mixture containing a glass component and a dielectric component represented by the compositional formula a.Li2O-b.(CaO1-x—SrOx)-c.R2O3-d.TiO2(wherein x satisfies 0≦x<1; R is at least one selected from La, Y and other rare-earth metals; and a, b, c and d satisfy 0≦a≦20 mol %, 0≦b≦45 mol %, 0<c≦20 mol %, 40≦d≦80 mol % and a+b+c+d=100 mol %). The dielectric component is prepared by calcining a raw material. The glass component contains at least a bismuth glass. After the firing, a ratio (second phase/first phase) in X-ray diffraction peak intensity of the second phase containing the rare-earth element to the first phase having a perovskite structure, as a main phase, does not exceed 20%.

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Ezaki, K. et al., “Microwave Dielectric Properties of Cao-Ln-2O3-TiO2Ceramics” Jpn. J. Appl. Phys. vol. 32 (1993) pp. 4319-4322.

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