Piezoelectric device with surface charge shunt

Details Piezoelectric device with surface charge shunt Piezoelectric device with surface charge shunt

1980-07-15

1984-05-29

Miller, J. D.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, 310346, 331176, H04R 1700

Patent

active

044517530

ABSTRACT:
A bulk wave piezoelectric device comprises a polarized ferroelectric ceramic plate, and electrodes formed on two main surfaces thereof, respectively, intersecting the polarization axis direction. The electrodes are connected to each other by means of an external resistance having a predetermined resistance value. The resistance value is selected to be smaller than the inherent resistance value of the ferroelectric ceramic plate between the two main surfaces. Positive and negative electric charges are stored on the two electrodes due to the pyroelectric effect responsive to a change of the temperature of the ferroelectric ceramic plate. The potential difference caused by the electric charges thus stored is rapidly decreased through the external resistance.

REFERENCES:
patent: 3397329 (1968-08-01), Riedel
patent: 3818254 (1974-06-01), Persson

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