Počet záznamů: 1

Nonlinear electromechanical response of the ferroelectret ultrasonic transducers

  1. 1.
    0352399 - FZU-D 2011 RIV DE eng J - Článek v odborném periodiku
    Döring, J. - Bovtun, Viktor - Bartusch, J. - Erhard, A. - Kreutzbruck, M. - Yakymenko, Y.
    Nonlinear electromechanical response of the ferroelectret ultrasonic transducers.
    Applied Physics A - Materials Science & Processing. Roč. 100, č. 2 (2010), 479-485 ISSN 0947-8396
    Grant CEP: GA ČR GAP204/10/0616; GA ČR(CZ) GA202/09/0682
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: piezoelectric * ferroelectret * transducer * ultrasonic
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.765, rok: 2010

    The ultrasonic transmission between two aircoupled polypropylene (PP) ferroelectret (FE) transducers in dependence on the amplitude of the high-voltage exciting pulse revealed a strongly nonlinear electromechanical response of the FE transmitter. This phenomenon is described by a linear increase of the inverse electromechanical transducer constant of the PP FE film with an increase of the exciting electrical pulse amplitude (by a factor of 4). The electrostriction contribution can be attributed to the electrostatic force between electrodes and the Maxwell stress effect. A significant enhancement of the ACUS system transmission (12 dB) and signal-to-noise ratio (32 dB) was demonstrated by the increase of excitation voltage up to 3500 V.
    Trvalý link: http://hdl.handle.net/11104/0006199