Title :
Method for calculating nonlinear electromechanical coupling
Author :
Leary, S.P. ; Pilgrim, S.M.
Author_Institution :
New York State Coll. of Ceramics, Alfred Univ., NY, USA
Abstract :
A general technique for calculating electromechanical coupling in linear and nonlinear electroactive materials at large applied electric fields and frequencies below resonance has been developed. Coupling for PMN relaxor ferroelectrics has been determined for both large ac drive fields (+/- 1.0 kV/mm) and for the dc-biased case (0.7 kV/mm +/- 0.3 kV/mm). Nominal values of coupling up to 0.53 were observed
Keywords :
dielectric resonance; electromechanical effects; ferroelectric materials; lead compounds; PMN; PMN relaxor ferroelectrics; PbMgO3NbO3; coupling; dc-bias; large ac drive fields; large applied electric fields; linear electroactive materials; nonlinear electroactive materials; nonlinear electromechanical coupling; resonance; Capacitive sensors; Ceramics; Couplings; Dielectric materials; Electric fields; Frequency; Magnesium; Polarization; Relaxor ferroelectrics; Resonance;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663079
