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Lead zirconate titanate (PZT) ceramics of morphotropical phase boundary (MPB) region possess prodigious physical properties such as high relative dielectric constant (ɛr), low relative tangent loss (tan δ), high Curie temperature (Tc), etc. In this work, the ferroelectric ceramics of chemical stoichiometry Pb(Zr0.52-xYxTi0.48)O3, x = 0.00, 0.10 and Y = Mn/Ce (PZ(M/C)T) have been synthesized using solid state synthesis. Results indicated that the PZ(M/C)T compounds exhibit the ferroelectric nature. The Tc values of PZT, PZMT and PZCT compounds are 375.17 °C, 272.25 °C and 373.05 °C respectively. Hence, with the substitution of Mn/Ce ions, the Tc of PZT has been reduced. Further, the loss of PZT has also been reduced due to the substitution of Mn/Ce ions at the zirconium site. Also reported in this paper is the quantitative diffusiveness of the compounds, calculated using Curie-Weiss expression. [ABSTRACT FROM AUTHOR]

The polycrystalline samples of Pb(Zr0.65-xAxTi0.35)O3 (A = Mn, Ce)(x = 0, 0.05) (PZM/CT) were prepared by a high-temperature solid-state reaction technique. Structural properties of the compounds were examined through X-ray diffraction (XRD) study and confirmed the formation of single-phase compounds at room temperature. Microstructural analysis of the surface of the compounds by scanning electron microscopy (SEM) suggests that there is a change in grain size and density due to introduction of Mn and Ce. Detailed studies of the dielectric properties reveal that both kinds of modifications induce a shift in Tc and improvement in dielectric constant. Nyquist plots shows that in both modifications the contribution of bulk is prominent towards resistivity of the materials. Conductivity (ac) also showed an improved in both modifications. [ABSTRACT FROM AUTHOR]