Structure and high piezoelectric response of the ternary 0.3BiFeO₃-0.5PbFe_0.5Nb_0.5O₃-0.2PbTiO₃ ceramics

Abstract

Ceramics of the ternary solid solution system 0.3BiFeO₃–0.5PbFe_0.5Nb_0.5O₃–0.2PbTiO₃ were prepared by the conventional solid-phase reaction method. It was found that at room temperature the samples had a tetragonal structure, which transformed into a cubic with increasing temperature. The grain structure, dielectric and piezoelectric characteristics of the obtained ceramics were studied. The piezoelectric coefficient d₃₃ = 260 pC/N was obtained. It was found that this solid solution demonstrated behavior typical for ferroelectric relaxors with a phase transition in the temperature range of 420 – 430°K. An explanation of the observed effects is given.

Keywords:

• Dielectric properties
• perovskites multiferroics
• piezoelectric properties
• solid solutions

Acknowledgments

This work was performed using the equipment of the Center for Collective Use “Electromagnetic, Electromechanical and Thermal Properties of Solids”, Research Institute of Physics, Southern Federal University and Center for Collective Use of the SSC RAS.

Additional information

Funding

The study was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation (state task in the field of scientific activity, scientific project No. 0852-2020-0032), (BAZ0110/20-3-07IF).