Apparatus for poling a piezoelectric ceramic

Details Apparatus for poling a piezoelectric ceramic Apparatus for poling a piezoelectric ceramic

1990-02-28

1991-09-03

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

29 2535, H01L 4108

Patent

active

050457470

ABSTRACT:
An apparatus for poling a piezoelectric ceramic includes a first and a second electrode which are connected to a DC power supply and spaced away from one another at a certain distance, and an insulated medium provided between the first and second electrodes. The second electrode is adapted to carry the piezoelectric ceramic which is spaced away from the first electrode. In this way, a piezoelectric ceramic can be poled by a poling field created between the first and second electrodes and prevented from being scraped by the first electrode or damaged by the ripples caused by an unstable voltage because of the separation of the piezoelectric ceramic to be poled from the first electrode and the buffering effect caused by the insulated medium between the first and second electrodes. In addition, the second electrode may be specifically in the form of a power-driven metal conveyor so that the piezoelectric ceramic to be poled can continuously pass through and be poled by the poling field.

REFERENCES:
patent: 2777188 (1957-01-01), Remeika
patent: 3213027 (1962-03-01), Fatuzzo
patent: 3924324 (1975-12-01), Kodera
patent: 4079437 (1978-03-01), Sheffield
patent: 4088917 (1978-05-01), Martin et al.
patent: 4340786 (1982-07-01), Tester
patent: 4345359 (1982-08-01), Micheron
patent: 4377839 (1983-03-01), Blomgren et al.
patent: 4426580 (1984-01-01), Smith
patent: 4527218 (1985-07-01), von Seggern

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