Title :
Uniaxial stress dependence of electromechanical and dielectric properties of 0.9PMN-O.1PT electroceramics
Author :
Zhao, J. ; Zhang, Q.M. ; Mueller, V.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The piezoelectric and dielectric coefficients d33 and K 33 obtained in the electric DC biased state of electrostrictive 0.9PMN-0.1PT electroceramics show a pronounced dependence on the value of the uniaxial stress T1 applied perpendicular to the electric field. This effect was attributed to the influence of T1 on the response of micro-polar regions and on the field induced transformation between the micro-polar and macro-polar state of 0.9PMN-0.1PT. The application of mechanical prestress T1 makes it possible to elevate the upper temperature limit for the use of the electroceramic in technical applications
Keywords :
electromechanical effects; ferroelectric ceramics; lead compounds; permittivity; piezoceramics; PMN-PT electroceramics; PMN-PbTiO3; PbMgO3NbO3-PbTiO3; dielectric coefficients; dielectric properties; electric DC biased state; electromechanical properties; electrostrictive PMN-PT electroceramics; field induced transformation; macro-polar state; mechanical prestress; micro-polar regions; micro-polar state; piezoelectric coefficients; uniaxial stress dependence; Capacitive sensors; Ceramics; Compressive stress; Dielectric materials; Electrostriction; Permittivity; Phase change materials; Strain measurement; Temperature dependence; Temperature distribution;
Conference_Titel :
Applications of Ferroelectrics, 1998. ISAF 98. Proceedings of the Eleventh IEEE International Symposium on
Conference_Location :
Montreux
Print_ISBN :
0-7803-4959-8
DOI :
10.1109/ISAF.1998.786708
