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Dielectric and electrostrictive properties of PMNT near MPB

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Author(s): Pawan Kumar et al

Journal: Science and Technology of Advanced Materials
ISSN 1468-6996

Volume: 8;
Issue: 6;
Start page: 463;
Date: 2007;
Original page

ABSTRACT
The dielectric constant (epsilonr), dielectric loss (tan δ) and strain induced by electric field in lead magnesium niobate–lead titanate (PMN-PT/PMNT) solid solutions in the morphotropic phase boundary (MPB) region at different sintering temperatures have been studied. epsilonr and tan δ increase, whereas Curie phase transition range decreases with the increase in sintering temperature. Strain levels in the range of 0.07–0.2% were obtained. A high saturated strain% ~0.19, a high d33 coefficient ~320 pm/V and a low strain hysteresis% ~3.5 in PMNT 68/32 composition sintered at 1200 °C indicate its suitability for actuator applications.
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