Effect of the substitution of titanium by niobium on the structural, electric and modulus properties in Ba0.97La0.02Ti(1-x)Nb4x/5O3 perovskites

Ba0.97La0.02Ti0.93Nb0.056O3 (illustrious as BLT0.93Nb0.056) novel lead-free sample was elaborated using the molten-salt reaction means. This polycristalline ceramic was checked by X-ray diffraction (XRD) at room-temperature (at RT), as well, the electric measurements over a broad temperature (T) and frequency (f) sequences. XRD pattern revealed a single-perovskite phase crystallized in a tetragonal system with P4/mmm space group. The electrical properties of the compound, deduced from the complex impedance analysis show a strong dependence on frequency (f). The EIS (Electrochemical Impedance Spectroscopy) data exhibited an approximately perfect semi-circle at elevated temperature in the complex plane plot as well as a practically ideal non-Debye peak shape in the spectroscopic plot. The semicircle arc specifies the existence of a frequency relaxation (f(max)) as well as a time relaxation (tau). These results could help understand the relationship linking the structure and the electrical properties of BLT0.93Nb0.056. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

A novel lead-free ceramic sample, BLT0.93Nb0.056, was synthesized using the molten-salt reaction method. The study examined the crystal structure, electrical properties, and relationship between them.