Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1998-01-27
1999-12-07
Ramirez, Nestor
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
252 629PZ, H01L 4104, C04B 3500
Patent
active
059989106
ABSTRACT:
<001>oriented crystals of lead zinc niobate--lead titanate solid solution (0 to 5 mole % lead titanate) have high electromechanical coupling>85% and exhibit electric field induced phase transition at electric field levels>10.times.Ec (where Ec is the coercive field), resulting in increased transducer driving voltages, decreased fabrication degradation, and high sensitivity/large bandwidth transducer characteristics due to high electromechanical couplings, up to 92%. <001>oriented crystals of lead magnesium niobate--lead titanate solid solution (20 to 50 mole % lead titanate) also exhibit high electromechanical couplings>85% and up to 94%, and thereby can be formed into transducers which exhibit both high sensitivity and large bandwidth.
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Lopath Patrick D.
Park Seung-Eek
Shrout Thomas R.
Medley Peter
Monahan Thomas J.
Ramirez Nestor
The Penn State Research Foundation
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