The Effect of Pr Doping Contents on the Structural, Microstructure and Dielectric Properties of BaBi2Nb2O9 Aurivillius Ceramics

Michał Rerak; Jolanta Makowska; Katarzyna Osińska; Tomasz Goryczka; Anna Zawada; Małgorzata Adamczyk-Habrajska

doi:10.3390/ma15165790

The Effect of Pr Doping Contents on the Structural, Microstructure and Dielectric Properties of BaBi₂Nb₂O₉ Aurivillius Ceramics

Materials (Basel). 2022 Aug 22;15(16):5790. doi: 10.3390/ma15165790.

Authors

Michał Rerak¹, Jolanta Makowska¹, Katarzyna Osińska¹, Tomasz Goryczka¹, Anna Zawada², Małgorzata Adamczyk-Habrajska¹

Affiliations

¹ Faculty of Science and Technology, University of Silesia, 1A 75 Pułku Piechoty St., 41-500 Chorzów, Poland.
² Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Aleja Armii Krajowej 19 Str., 42-200 Czestochowa, Poland.

Abstract

Aurivillius BaBi₂Nb₂O₉ and Ba_1-xPr_xBi₂Nb₂O₉ ceramics were successfully synthesized by a simple solid state reaction method. Ceramics were prepared from reactants: Nb₂O₅, Bi₂O₃, BaCO₃ and Pr₂O₃. The microstructure, structure, chemical composition, and dielectric properties of the obtained materials were examined. Dielectric properties were investigated in a wide range of temperatures (T = 20-500 °C) and frequencies (f = 0.1 kHz-1 MHz). The obtained ceramic materials belong to the group of layered perovskites, crystallizing in a tetragonal structure with the space group I4/mmm. Modification of the barium niobate compound with praseodymium ions influenced its dielectric properties and introducing a small concentration of the dopant ion causes a slight increase in the value of electric permittivity and shifts its maximum towards higher temperatures.

Keywords: Aurivillius structure; BaBi2Nb2O9; ceramics; praseodymium Pr3+.

Grants and funding

The present paper was financed in part by the Polish Ministry of Education and Science within statutory activity.