Effect of Niobium doping on structural, thermal, sintering and electrical properties of Bi{sub 4}V{sub 1.8}Cu{sub 0.2}O{sub 10.7}
- Centre d'Excellence de Recherche sur les Materiaux, Universite Cadi Ayyad, Faculte des Sciences Semlalia, Marrakech (Morocco)
- Laboratoire de Physique du Solide et des Couches Minces, Departement de physique, Faculte des Sciences Semlalia, Marrakech (Morocco)
- Institut de Chimie de la Matiere Condensee de Bordeaux, Av. Dr A.Schweitzer, 33608, Pessac (France)
Doping Bi{sub 4}V{sub 1.8}Cu{sub 0.2}O{sub 10.7} with niobium has led to the formation of the Bi{sub 4}V{sub 1.8}Cu{sub 0.2-x}Nb{sub x}O{sub 10.7+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 {gamma}{sup '} polymorph while the other compositions are of {beta} 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{sup o}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.
- OSTI ID:
- 20729097
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 9; Other Information: DOI: 10.1016/j.jssc.2005.06.030; PII: S0022-4596(05)00280-X; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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