Effect of Mn-substitution on structural and dielectric properties of Pb(Zr0.65−xMnxTi0.35)O3 ceramics

The polycrystalline samples of Pb(Zr_0.65?xMn_xTi_0.35)O₃ (x = 0, 0.05, 0.10, 0.15) (PZMT) were prepared by a high-temperature solid-state reaction technique. Structural properties of the compounds were examined using an X-ray diffraction (XRD) technique to confirm the formation of single-phase compounds (with perovskite structure) at room temperature. Microstructural analysis of the surface of the compounds by scanning electron microscopy (SEM) exhibits that there is a significant change in grain size on introduction, at the Zr-site, of Mn. Detailed studies of the dielectric properties of PZMT show a measurable shift in T_c, change in dielectric constant, and ac conductivity.