Synthesis of Pb(Zr_0.35−xMn_xTi_0.65)O₃, x = 0.00, 0.02, 0.06, 0.10 ceramics and their structural, dielectric characteristics

Abstract The samples of stoichiometry Pb(Zr_0.35−xMn_xTi_0.65)O₃, x = 0.00, 0.02, 0.06, 0.10 (PZMT) were synthesized by solid state reaction route. For the first time, 35/65 lead zirconate titanate ceramics were modified by manganese (Mn) by replacing zirconium. X-ray diffraction (XRD) study has confirmed the formation of tetragonal phase in samples and no structural change has been observed due to Mn doping. Results of scanning electron microscopy (SEM) showed polycrystalline nature through shape, size and grain distribution in microstructures of all samples. At room temperature, the samples have shown identical nature in variation of dielectric constant (ϵ _r) and tangent loss (tanδ) with frequency. At 50 kHz frequency, the value of maximum dielectric constant (ϵ _max) has been changed from 5440 to 12 562 due to Mn. With increase in doping amount of Mn, the values of Curie temperature (T _c) have been decreased from 435 to 373 °C. Tanδ of samples is decreased with increase in the dopant concentration. The diffusivity of PZT has increased with 2% of Mn doping. But further increase in the Mn concentration has decreased the diffusiveness of the samples.