Solid solutions in the (x)PbTiO3–(1−x)Bi(Zn3∕4W1∕4)O3 system have been examined by x-ray diffraction, dielectric measurements, and thermal analysis. Bi(Zn3∕4W1∕4)O3 increases the tetragonality and Curie temperature of PbTiO3 which reach a value of 1.08 and 530°C, respectively, at the limit of the single-phase perovskite forming region (x∼0.8). The observation of a sustained increase in the tetragonality in this system is similar to the behavior of the (x)PbTiO3–(1−x)Bi(Zn1∕2Ti1∕2)O3 system and highlights the unique properties of Bi-based systems when the B sites contain high concentrations of highly polarizable cations.
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Stein et al. (2006) studied this question.
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