Dielectric ceramic compositions

Details Dielectric ceramic compositions Dielectric ceramic compositions

1998-04-08

1999-11-16

Group, Karl

Compositions: ceramic

Ceramic compositions

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

C04B 35495

Patent

active

059857811

ABSTRACT:
Provided with a dielectric ceramic composition for microwaves having the formula represented by yMgTa.sub.2-x O.sub.6-5/2x +(1-y)ZnNb.sub.2 O.sub.6 +wC, wherein 0<x.ltoreq.0.8, 0.1.ltoreq.y.ltoreq.1, 0.ltoreq.w.ltoreq.2 wt %, and C is at least one selected from a group consisting of Sb.sub.2 O.sub.5, CuO, ZnO, NiO, MgO, SrCO.sub.3, BaCO.sub.3, ZrO.sub.2, WO.sub.3, and TiO.sub.2, the composition having a low permittivity of 20-30, a quality factor almost equal to that of Ba(Zn,Ta)O.sub.3 families, and a relatively excellent sintering characteristic, thus particularly suitable for dielectric resonators in a high frequency band above 10 GHz.

REFERENCES:
patent: 5756412 (1998-05-01), Lee et al.
Chem. Abstracts 129:309681, Lee et al, abstract of KR 97-12938, Apr. 1997.
Chem. Abstracts 79:97877, Perrotta et al, J. Amer. Ceram. Soc (1973), 56(8), 441, 1973.
Chem. Abstracts, 109:203627 Halle et al, Z. Anorg. Allg. Chem. (1988), 562,87-90, 1988.

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