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Author: search.filters.author.Cann, D. P.Subject: search.filters.subject.Phase transitions

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    Piezoelectric properties of (1 - x)Pb(Zr1/2Ti1/2)O3-xPb(Zn1/3Nb2/3)O3 ceramics prepared by the columbite-(wolframite) precursor method
    (2006-06-01)
    Vittayakorn, N.
    ;
    Puchmark, C.
    ;
    Rujijanagul, G.
    ;
    Tan, X.
    ;
    Cann, D. P.
    Solid solutions of the perovskite structure, (1 - x)Pb(Zr<inf>1/2</inf>Ti<inf>1/2</inf>)O<inf>3</inf>-xPb(Zn<inf>1/3</inf>Nb<inf>2/3</inf>)O<inf>3</inf> with x = 0.1-0.5, were synthesized via the columbite-(wolframite) precursor method. The phase development of calcined powder precursors was analyzed by X-ray diffraction. Phase-pure perovskite of PZN-PZT ceramics was obtained over a wide compositional range. The microstructure and piezoelectric properties were characterrized by means of scanning electron microscopy (SEM), d<inf>33</inf> measurements and impedance analysis. It has been found that ultra-high piezoelectric properties were observed in compositions close to a morphotropic phase boundary (MPB). The maximum value of d<inf>33</inf> (690 pC/N) and the highest k<inf>p</inf> (0.7) were recorded for the composition x = 0.3 located at the boundary between tetragonal and rhombohedral ferroelectric phases. Furthermore, large values of d<inf>33</inf> (600 pC/N) and k<inf>p</inf> (0.67) were observed at a compositions of x = 0.5, which is the boundary between two ferroelectric rhombohedral phases. © 2005 Elsevier B.V. All rights reserved.