Dielectric ceramics

Details Dielectric ceramics Dielectric ceramics

1992-11-09

1993-09-21

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

501108, 501121, 501123, C04B 3500

Patent

active

052468984

ABSTRACT:
High-frequency dielectric ceramics which contains the oxide of a complex perovskite structure as the main component, have a mean crystal gain size of sintered ceramic controlled to within the range of 5 .mu.m to 20 .mu.m and a porosity not exceeding 7% and provides high unloaded Q without requiring long-hour sintering or heat treatment.

REFERENCES:
patent: 4121941 (1978-10-01), Kawashima et al.
patent: 4487842 (1984-12-01), Nomura et al.
patent: 4731207 (1988-03-01), Matsumoto et al.
S. Kawashima, et al., "Ba(Zn.sub.1/3 Ta.sub.2/3)O.sub.3 Ceramics With Low Dielectric Loss at Microwave Frequencies", Journal of the American Ceramic Society, vol. 66-6 (1983), pp. 421-423.
Search Report dated Aug. 6, 1991 of corres. European Pat. Appln. 911062636.

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