Structural, optical spectroscopy, optical conductivity and dielectric properties of BaTi$_{0.5}$(Fe$_{0.33}$W$_{0.17}$)O$_{3}$ perovskite ceramic

Bulletin of materials science

FAYÇAL BOURGUIBA¹  AHMED DHAHRI¹  TAREK TAHRI³  JEMAI DHAHRI¹  KAMEL TAIBI⁴  E K HLIL² 

[1] Laboratory of Condensed Matter and Nanosciences, Faculty of Sciences of Monastir, Monastir 5019, Tunisia$$Laboratory of Condensed Matter and Nanosciences, Faculty of Sciences of Monastir, Monastir 5019, TunisiaLaboratory of Condensed Matter and Nanosciences, Faculty of Sciences of Monastir, Monastir 5019, Tunisia$$;Institut Néel, CNRS-Université J. Fourier, B.P. 166, 38042 Grenoble, France$$Institut Néel, CNRS-Université J. Fourier, B.P. 166, 38042 Grenoble, FranceInstitut Néel, CNRS-Université J. Fourier, B.P. 166, 38042 Grenoble, France$$;Laboratoire de Physique Appliqué, Département de Physique, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia$$Laboratoire de Physique Appliqué, Département de Physique, Faculté des Sciences de Sfax, 3018 Sfax, TunisiaLaboratoire de Physique Appliqué, Département de Physique, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia$$;Laboratoire de Science et Génie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, BP32 El Alia, Bab Ezzouar 16111, Algeria$$Laboratoire de Science et Génie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, BP32 El Alia, Bab Ezzouar 16111, AlgeriaLaboratoire de Science et Génie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, BP32 El Alia, Bab Ezzouar 16111, Algeria$$

关键词: Perovskite;    BaTiO$_3$;    X-ray diffraction;    spectroscopic ellipsometry;    refractive index.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Fe and W co-substituted BaTiO3 perovskite ceramics, compositional formula BaTi$_{0.5}$(Fe$_{0.33}$W$_{0.17}$)O$_3$, were synthesized by the standard solid-state reaction method and studied by X-ray diffraction, scanning electronmicroscopy and spectroscopy ellipsometry. The prepared sample remains as double phases with the perovskite structure. The structure refinement of BaTi$_0.5$(Fe$_{0.33}$W$_{0.17}$)O$_3$ sample was performed in the cubic double and hexagonal setting of theand P6$_3$/mmc space groups. Spectral dependence of optical parameters; real and imaginaryparts of the dielectric function, refractive index, extinction coefficient and absorption coefficient were carried out in the range between 1.4 and 4.96 eV by using the ellipsometry experiments. Direct bandgap energy of 4.36 eV was found from the analysis of absorption coefficient vs. photon energy. In addition, the oscillator energy, dispersion energy and zero-frequency refractive index values were found from the analysis of the experimental data usingWemple�?�DiDomenico single-effective-oscillator model.

【 授权许可】

Unknown