Piezoelectric displacement element

Details Piezoelectric displacement element Piezoelectric displacement element

1984-09-19

1987-03-10

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310332, 310359, 310366, 310328, H01L 4108

Patent

active

046493131

ABSTRACT:
Disclosed herein is a piezoelectric displacement element utilizing a sintered body obtained by stacking three or more ceramic layers (5a to 5h) through internal electrodes (6b to 6h) and co-firing the same. The sintered body has first, second and third regions when viewed in the direction of thickness. The first and third regions are so formed as to be displaced in reverse directions to each other. The second region consists of a plurality of piezoelectric ceramic layers (5d, 5e) in such a manner that an internal electrode (6e) interposed between the piezoelectric ceramic layers (5d, 5e) is connected with neither potentials in a driven state, whereby the second region is adapted not to be positively driven, to function as a buffer area.

REFERENCES:
patent: Re27116 (1971-04-01), Miller et al.
patent: 1798101 (1931-03-01), Nicolson
patent: 3163783 (1964-12-01), Howatt et al.
patent: 3489931 (1970-01-01), Teaford
patent: 3590287 (1971-06-01), Berlincourt et al.
patent: 4087716 (1978-05-01), Heywang
patent: 4330730 (1982-05-01), Kurz et al.
patent: 4443729 (1984-04-01), Rider
patent: 4564782 (1986-01-01), Ogawa

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