Phase Diagram for the 0.4Pb(Ni1/3,Nb1/3)O3–0.6Pb(Zr,Ti)O3 Solid Solution in the Vicinity of a Morphotropic Phase Boundary

Authors

  • Gilles Robert,

    Corresponding author
    1. Department of Materials Science, Laboratory of Ceramics, Swiss Federal Institute of Technology (EPFL), 1015 Lausanne, Switzerland
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  • Marlyse Demartin,

    1. Department of Materials Science, Laboratory of Ceramics, Swiss Federal Institute of Technology (EPFL), 1015 Lausanne, Switzerland
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  • Dragan Damjanovic

    1. Department of Materials Science, Laboratory of Ceramics, Swiss Federal Institute of Technology (EPFL), 1015 Lausanne, Switzerland
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  • M. L. Mulvihill—contributing editor

  • Supported by the Fonds National de la Recherche Suisse (FNRS).

† Author to whom correspondence should be addressed (E-mail address: Gilles.Robert@lc.dmx.epfl.ch).

Abstract

A phase diagram based on dielectric-permittivity-versus-temperature measurements and high-temperature X-ray diffractometry was proposed for 0.4Pb(Ni1/3,Nb1/3)O3-xPbZrO3-(0.6-x)PbTiO3 (0.2 lessthan equal to x lessthan equal to 0.32) relaxor-ferroelectric solid solution, and a morphotropic phase boundary that sharply bends toward zirconium-rich compositions was found. A spontaneous normal-to-relaxor ferroelectric transition was also observed when heating was performed for all the compositions tested near the morphotropic phase boundary. Additional considerations about previously published phase diagrams for Pb(Zn1/3,Nb2/3)O3-PbTiO3 and Pb(Mg1/3,Nb1/3)O3-PbTiO3 might lead to an extension of the presented diagram to these compositions.

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