Multilayer electrostrictive element which withstands repeated ap

Details Multilayer electrostrictive element which withstands repeated ap Multilayer electrostrictive element which withstands repeated ap

1983-05-11

1985-06-11

Wong, Peter S.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310338, H01L 4118

Patent

active

045231214

ABSTRACT:
A multilayer electrostrictive element has electrostrictive sections (31) defined by internal electrodes (32) in a stack, with a peripheral surface which has a predetermined outline perpendicularly of an axis of the stack, each internal electrode with an outline which is approximately congruent with the predetermined outline (constant cross-section). In order that external electrodes (33, 34) may readily be connected to the internal electrodes grouped by twos, each internal electrode may have a peripheral end which is partly recessed from the predetermined outline, as in FIG. 8. Alternatively, the internal electrodes of each group may be connected together by a conductor rod which passes through the electrostrictive sections, preferably along their edges, contacting alternate electrodes. For a great number of internal electrodes, an element may be manufactured by laminating conductive-paste-printed green sheets transversely of the stack axis and then sintering the lamination. Each internal electrode may include a ceramic material, such as an electrostrictive material of the electrostrictive sections, another electrostrictive material of a lower sintering temperature, or glass.

REFERENCES:
patent: 2487165 (1949-11-01), Miller
patent: 2894317 (1959-07-01), Marks
patent: 3179826 (1965-04-01), Trott et al.
patent: 3349259 (1967-10-01), Kistler
patent: 3390287 (1968-06-01), Sonderegger
patent: 3521090 (1970-07-01), Angeloff
patent: 3586889 (1971-06-01), Kolter
patent: 3593068 (1971-07-01), Rosler
patent: 3686518 (1972-08-01), Hartmann et al.
patent: 3982144 (1976-09-01), Rogers et al.

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