Structural, vibrational, and dielectric investigations of Ba0.925Bi0.05(Ti0.95-x Zr (x) )Sn0.05O3 ceramics

N. Haddadou , J. Belhadi (1) , B. Manoun (2) , K. Taibi (3) , B. Carcan (1) , M. El Marssi (1) , A. Lahmar (1)

1 LPMC - Laboratoire de Physique de la Matière Condensée - UR UPJV 2081
2 Laboratoire de Chimie des Matériaux Solides
3 Laboratoire des Sciences et Génie des Matériaux [Université Houari Boumediene - Alger]

Ceramics of Ba0.925Bi0.05(Ti0.95-x Zr (x) )Sn0.05O3 (0.05 x 0.30) were prepared by conventional solid-state reaction technique. The effects of the Zr4+ addition to the structural and dielectric properties were investigated. The room temperature X-ray study has allowed to evidence a tetragonal symmetry up to x = 0.10, and beyond it to a cubic single phase. Thermal dielectric study at different frequencies has revealed two different behaviors, a normal ferroelectric for x ae 0.10, and a relaxor character for the rest of the solid solution. High temperature Raman spectra corroborates the arguments of the phase transition revealed by dielectric results. In addition, a remarkable line broadening was observed in Raman spectra, which can be attributed to a certain disorder in the structure lattice. The low Zr-composition was found to exhibit a flat epsilon (r) `(T) curve with stable dielectric permittivity in a large range of temperature, promising for the X7R specifications.

Domaines: Matière Condensée [cond-mat]

N. Haddadou, J. Belhadi, B. Manoun, K. Taibi, B. Carcan, et al.. Structural, vibrational, and dielectric investigations of Ba0.925Bi0.05(Ti0.95-x Zr (x) )Sn0.05O3 ceramics. Journal of Materials Science: Materials in Electronics, 2018, 29 (18, SI), pp.16144-16154. ⟨10.1007/s10854-018-9703-y⟩. ⟨hal-03627572⟩