Synthesis, sintering and electrical properties of P-doped Bi₄V₂O₁₁ ceramics

M. Alga (1) , Abdelaziz Ammar (1) , R. Essalim (1) , B. Tanouti (1) , Fabrice Mauvy (2) , Rodolphe Decourt (2)

1 Laboratoire de Chimie du Solide Mineral
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Partial substitution of vanadium by phosphorus in Bi₄V₂O₁₁, compound belonging to the Aurivillius family, leads to the formation of Bi₄V_2−xP_xO₁₁ solid solution with an orthorhombic symmetry and does not stabilize the γ-high temperature form down to room temperature. X-ray diffraction, density measurements, thermal analysis and IR spectroscopy have been used to confirm the formation of the solid solution. The influence of sintering temperature on the microstructure and the grains size of the samples with different compositions was investigated by the scanning electron microscopy (SEM). The evolution of the electrical conductivity with phosphorus ratio has been investigated by impedance spectroscopy and correlated to the structural transformations.

Mots clés: Aurivillius phases; Ionic conductors; BIMEVOX materials

Domaines: Matériaux

M. Alga, Abdelaziz Ammar, R. Essalim, B. Tanouti, Fabrice Mauvy, et al.. Synthesis, sintering and electrical properties of P-doped Bi₄V₂O₁₁ ceramics. Solid State Sciences, 2005, 7 (10), pp.1173-1179. ⟨10.1016/j.solidstatesciences.2005.06.011⟩. ⟨hal-00361297⟩