Piezoelectric device, method of actuating the same,...

Details Piezoelectric device, method of actuating the same,... Piezoelectric device, method of actuating the same,...

2006-09-15

2010-12-07

Luu, Matthew (Department: 2861)

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Ejector mechanism

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07845767

ABSTRACT:
A piezoelectric device comprises a piezoelectric body and electrodes for applying an electric field in a predetermined direction across the piezoelectric body. The piezoelectric body contains an inorganic compound polycrystal, which contains first ferroelectric substance crystals having orientational characteristics at the time free from electric field application and has characteristics such that, with application of at least a predetermined electric field E1, at least part of the first crystals undergoes phase transition to second ferroelectric substance crystals of a crystal system different from the crystal system of the first crystals. The piezoelectric device is actuated under conditions such that a minimum applied electric field Emin and a maximum applied electric field Emax satisfy Emin<E1<Emax.

REFERENCES:
patent: 5804907 (1998-09-01), Park et al.
patent: 2000-326506 (2000-11-01), None
patent: 3568107 (2004-06-01), None
patent: 2005-93133 (2005-04-01), None
patent: WO-98/33220 (1998-07-01), None
Park et al., “Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals,” J. Appl. Phys., vol. 82, No. 4, 1997, pp. 1804-1811.

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