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

L. Ben Abdessalem (1) , S. Aydi (2) , A. Aydi (2) , Z. Sassi (3) , A. Maalej (4) , H. Khemakhem (1)

1 Laboratoire Mat. Ferroelect.-Sfax
2 Université de Sfax - University of Sfax
3 LGEF - Laboratoire de Génie Electrique et Ferroélectricité
4 LMF - Laboratoire des Matériaux Ferroélectriques

Ba0.837Sr0.093Na0.07Ti0.93Nb0.07O3 (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 BaTiO3, at room temperature. It shows the introduction of a disorder in this composition, thus favoring a ferroelectric relaxor behavior.

Mots clés: Perovskite; BaTiO3; Perovskite Structure; Barium Titanate; Dielectric Measurement

Domaines: Sciences de l'ingénieur [physics]

L. Ben Abdessalem, S. Aydi, A. Aydi, Z. Sassi, A. Maalej, et al.. X-ray diffraction, dielectric, and Raman spectroscopy studies of BaSrTiO3–NaNbO3 ceramic. Applied physics. A, Materials science & processing, 2017, 123 (5), ⟨10.1007/s00339-017-0920-7⟩. ⟨hal-01764353⟩