Piezoelectric and electrostrictive effects in ferroelectret ultrasonic transducers

0386767 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Döring, J. - Bovtun, Viktor - Gaal, M. - Bartusch, J. - Erhard, A. - Kreutzbruck, M. - Yakymenko, Y.
Piezoelectric and electrostrictive effects in ferroelectret ultrasonic transducers.
Journal of Applied Physics. Roč. 112, č. 8 (2012), "084505-1"-"084505-6". ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GAP204/10/0616
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: piezoeffect * ferroelectret * transducer
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.210, rok: 2012
http://jap.aip.org/resource/1/japiau/v112/i8/p084505_s1

Electromechanical response of polypropylene ferroelectret transducers under application of high-voltage pulses was measured by laser Doppler vibrometry and compared with results of ultrasonic through-air transmission between two ferroelectret transducers. The electromechanical response was completely explained by piezoelectric and electrostrictive effects. The electrostrictive effect dominates at high voltages and provides significant enlargement of the transducer constant, up to factor of 2.5. The induced strain of 1.7% was achieved at -2000 V. The nonlinear ultrasonic transmission was shown to be well described by the piezoelectric and electrostrictive response of transmitter.
Trvalý link: http://hdl.handle.net/11104/0216030