X-ray diffraction, dielectric, and Raman spectroscopy studies of BaSrTiO3–NaNbO3 ceramic

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2017-05, Vol.123 (5), p.1-6, Article 305
• Main Authors: Abdessalem, L. Ben, Aydi, S., Aydi, A., Sassi, Z., Maalej, A., Khemakhem, H.
• Format: Article
• Language: English
• Subjects: Applied physics; Barium titanates; Characterization and Evaluation of Materials; Chemical synthesis; Condensed Matter Physics; Crystal structure; Dielectric properties; Engineering Sciences; Ferroelectric materials; Ferroelectricity; Machines; Manufacturing; Materials science; Nanotechnology; Optical and Electronic Materials; Perovskites; Phase transitions; Physics; Physics and Astronomy; Processes; Raman spectra; Raman spectroscopy; Room temperature; Surfaces and Interfaces; Thin Films; X-ray diffraction
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-017-0920-7

Ba 0.837 Sr 0.093 Na 0.07 Ti 0.93 Nb 0.07 O 3 (BSNTN) ceramic was synthesized by the solid-state reaction at 1350 °C for 3 h. The crystal structure, investigated by X-ray diffraction at room temperature, revealed a single-phase perovskite crystallizing with tetragonal P4mm group space. Dielectric properties were investigated as a function of applied frequency. The ferroelectric behavior has been confirmed by hysteresis investigation. The evolution of the Raman spectra was used to study the variations of the basic phase transition of BaTiO 3 , at room temperature. It shows the introduction of a disorder in this composition, thus favoring a ferroelectric relaxor behavior.