124.
This paper reports an investigation on the structure-properties correlation of trivalent metal oxide (Al
2O
3)-doped V
2O
5 ceramics synthesized by the melt-quench technique. XRD patterns confirmed a single orthorhombic V
2O
5 phase formation with increasing strain on the doping of Al
2O
3 in place of V
2O
5 in the samples estimated by Williamson-Hall analysis. FTIR and Raman investigations revealed a structural change as [VO
5] polyhedra converts into [VO
4] polyhedra on the doping of Al
2O
3 into V
2O
5. The optical band gap was found in a wide semiconductor range as confirmed by UV–visible spectroscopy analysis. The thermal and conductivity behavior of the prepared samples were studied using thermal gravimetric analysis (TGA) and impedance analyzer, respectively. All the prepared ceramics exhibit good DC conductivity (0.22–0.36 Sm
-1) at 400 ?C. These materials can be considered for intermediate temperature solid oxide fuel cell (IT-SOFC)/battery applications due to their good conductivity and good thermal stability.
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