Synthesis, structural characterization, electric and dielectric properties of Pr0.67Ba0.22Sr0.11Mn0.925Ni0.075O3 perovskite for thermal energy storage

The interest in renewable energy sources grows rapidly and necessities evolved materials. In this setting, we prepared the Pr0.67Ba0.22Sr0.11Mn0.975Ni0.025O3 compound with using the solid-state reaction. Rietveld refinement of XRD pattern indicates the sample crystallizes in the orthorhombic structure with Pnma space group. The impedance spectroscopy technique was investigated to know the electric, dielectric as well as capacitor characteristics of the synthesized sample. For the compound, conductivity analysis proved the presence of two metal–semiconductor transitions in the temperature range from 80 K to 400 K. The studies of the real part of the permittivity and the capacity of the samples show that this material is a good candidate for high frequency energy storage devices. Also, impedance study indicates the presence of a Debye relaxation phenomenon in the system for all temperature range and the presence of tow metal-semiconductor transitions. In addition, the modulation of the material by an electrical equivalent circuit shows low values of resistance and high values of grain boundary with medium capacity. Moreover, this study confirmed the result obtained by dielectric study. Finally, this material contains other specific properties that need more investigations.