Dielectric, piezoelectric, and electromechanical properties of morphotropic phase boundary compositions in the Pb (Mg1/3 Ta2/3) O3 - PbZrO3 - PbTiO3 ternary system

Hua Hao, Shujun Zhang, Hanxing Liu, Thomas R. Shrout

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17 Scopus citations

Abstract

Morphotropic phase boundary (MPB) compositions, separating the rhombohedral and tetragonal phases within the Pb (Mg1/3 Ta2/3) O3 - PbZrO3 - PbTiO3 (PMT-PZ-PT) ternary system, were identified using x-ray diffraction and confirmed by their dielectric and piezoelectric properties. Optimal properties were found for the MPB composition of 0.4PMT-0.2PZ-0.4PT, with a dielectric constant εr and a piezoelectric coefficient (d33) of the order of 4000 and 580 pC/N, respectively. The planar and thickness electromechanical coupling factors were found to be kp =57.2% and kt =44.4%, with a moderate Curie temperature of 175 °C. Compositions with increasing PMT content (>0.3) exhibited relaxorlike characteristics, showing dispersive dielectric behavior with respect to frequency, indicative of the decay of the macrodomain state to microdomain state.

Original languageEnglish (US)
Article number024104
JournalJournal of Applied Physics
Volume105
Issue number2
DOIs
StatePublished - Feb 9 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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