Piezoelectric transformer element and method of manufacturing th

Details Piezoelectric transformer element and method of manufacturing th Piezoelectric transformer element and method of manufacturing th

1998-12-11

2000-10-31

Enad, Elvin

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, 310328, H01L 4108

Patent

active

06140747&

ABSTRACT:
A piezoelectric transformer element includes a piezoelectric plate made of a ceramic material, and input and output electrodes formed on the piezoelectric plate, and outputs a voltage from the output electrode upon application of a voltage to the input electrode. A reinforcing layer is selectively disposed on that portion of the piezoelectric plate where tensile stress concentrates when the piezoelectric transformer element is driven. The reinforcing layer is made of a material having the same composition as that of the ceramic material forming the piezoelectric plate and a particle size, after sintering, smaller than that of the ceramic material. A method of manufacturing a piezoelectric transformer element includes the steps of selectively disposing a reinforcing layer made of a ceramic powder at a required portion of each of ceramic sheets that form a piezoelectric plate of the piezoelectric transformer element, and molding and sintering the ceramic sheets and the ceramic powder, thus fabricating the piezoelectric plate. The ceramic powder has the same composition as that of the ceramic sheets of the piezoelectric plate and a specific powder surface area larger than that of the piezoelectric plate.

REFERENCES:
patent: 4510410 (1985-04-01), Yuhara et al.

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