Dielectric ceramic composition for use in high-frequency range a

Details Dielectric ceramic composition for use in high-frequency range a Dielectric ceramic composition for use in high-frequency range a

1989-12-08

1990-11-06

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

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

501135, 501136, 501137, 501138, 501139, C04B 3548

Patent

active

049686496

ABSTRACT:
The present invention provides a dielectric ceramic composition for use in a high-frequency range represented by the general formula (1-x)Ba.sub.1- y(Zn.sub.1/3, Ta.sub.2/3)O.sub.3 +xBa.sub.1-y ZrO.sub.3. In the formula, y is 0.004.ltoreq.y.ltoreq.0.013 and x is the amount of substitution of Ba.sub.1-y ZrO.sub.3 and 0<x.ltoreq.0.06. This composition is prepared by weighing raw materials so that the mixing ratio of Ba is slightly smaller than that of the stoichiometric composition, calcining the resultant mixture to prepare a calcination product, grinding the calcination product through only dry process without conducting wet pulverization, molding the resultant powder, and sintering the molded product at 1600.degree. to 1700.degree. C. for 1 to 10 hr.

REFERENCES:
patent: 4216102 (1980-08-01), Furukawa et al.
"Erekutoroniku Seramikkusu (Electronic Ceramic)", by K.K. Gakkansha, Mar. 1986, pp. 41-45.

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