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Fine grains ceramics of PIN-PT, PIN-PMN-PT and PMN-PT systems: Drift of the dielectric constant under high electric field.

Pham-Thi M, Augier C, Dammak H, Gaucher P

Thales Research and Technology France, Route Départementale 128, F-91767 Palaiseau Cedex, France.

Lead-based ferroelectric ceramics with (1-x)Pb(B(1) B(2))O(3)-xPbTiO(3) formula have emerged as a group of promising materials for various applications like ultrasonic sonars or medical imaging transducers. (1-x)PMN-xPT, (1-x)PIN-xPT and ternary solutions xPIN-yPMN-zPT ceramics are synthesised using the solid state reaction method. Our objective is to achieve higher structural transition temperatures than those of PMN-PT ceramics with as good dielectric, piezoelectric and electromechanical properties. Ceramics capacitance and loss tangent are measured when the ac field of measurement increases up to E=500V/mm. Behaviours of these materials under ac field are related to their coercive field and Curie temperature.

Published 1 January 2007 in Ultrasonics, 44: e627-31.
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