Method for manufacture of high-frequency dielectric ceramics

Details Method for manufacture of high-frequency dielectric ceramics Method for manufacture of high-frequency dielectric ceramics

1985-10-30

1988-03-15

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 65, 264 66, 264 57, C04B 3500

Patent

active

047312076

ABSTRACT:
A dielectric ceramics possessing a high level of unloaded Q and low loss at high frequency beneficial for communications at high frequency is produced by a method which comprises heating a green compact of a composition represented by the general formula: xBaO.yMgO.zTa.sub.2 O.sub.5 (wherein x, y, and z satisfy 0.5.ltoreq.x.ltoreq.0.7, 0.15.ltoreq.y.ltoreq.0.25, 0.15.ltoreq.z.ltoreq.0.25, and x+y+z=1) to a temperature in the range of 1,500.degree. to 1,700.degree. C. at a temperature increasing rate of 100.degree. to 1,600.degree. C./minute and subsequently retaining the green compact at the temperature for not less than 30 minutes.

REFERENCES:
patent: 4487842 (1984-12-01), Nomura et al.
patent: 4490319 (1984-12-01), Lee et al.

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