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Solid solutions of xPb(Yb1/2Nb1/2)O3–(1−x)Pb(Zr0.52Ti0.48)O3, x=0–0.25, were investigated from the viewpoint of structural, dielectric, and piezoelectric properties. With increasing Pb(Yb1/2Nb1/2)O3 content (x), the structural change occurred from the tetragonal to the pseudocubic phase at room temperature. The morphotropic phase boundary (MPB) between the tetragonal and pseudocubic phases was shown in the region of x=0.05–0.10. Polarization and electric-field-induced strain exhibited a maximum at the composition near MPB. It may be concluded that both the ease of domain switching and the enhanced polarization play an important role in bringing about large electric-field-induced strain. At this composition, the remnant polarization and coercive field were 29.5 μC/cm2 and 4.5 kV/cm at 17 kV/cm, respectively, and a maximum electric-field-induced strain of 0.97×10−3 at 25 kV/cm was obtained. Also, the electromechanical coupling coefficient (Kp) and mechanical quality factor (Qm) were 0.47 and 65, respectively.
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Yoon et al. (2000) studied this question.
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