Effect of Niobium doping on structural, thermal, sintering and electrical properties of Bi4V1.8Cu0.2O10.7 - Archive ouverte HAL Access content directly
Journal Articles Journal of Solid State Chemistry Year : 2005

Effect of Niobium doping on structural, thermal, sintering and electrical properties of Bi4V1.8Cu0.2O10.7

Abstract

Doping Bi4V1.8Cu0.2O10.7 with niobium has led to the formation of the Bi4V1.8Cu0.2−xNbxO10.7+3x/2 solid solution. X-ray diffraction and thermal analysis have shown that only the compound with x=0.05 presents a tetragonal symmetry with a γ′ polymorph while the other compositions are of β polymorph. The influence of sintering temperature on the microstructure of the samples was investigated by the scanning electron microscopy (SEM). The ceramics sintered at temperatures higher than 820 °C present micro-craks. The evolution of the electrical conductivity with temperature and the degree of substitution has been investigated by impedance spectroscopy. Among all compositions studied the sample with x=0.05 presents the highest value of the conductivity.

Dates and versions

hal-00096665 , version 1 (19-09-2006)

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Cite

M. Alga, Abdelaziz Ammar, B. Tanouti, A. Outzourhit, Fabrice Mauvy, et al.. Effect of Niobium doping on structural, thermal, sintering and electrical properties of Bi4V1.8Cu0.2O10.7. Journal of Solid State Chemistry, 2005, vol. 178, n° 9, p. 2873-2879. ⟨10.1016/j.jssc.2005.06.030⟩. ⟨hal-00096665⟩

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