Manjunath, G.Vardhan, R.V.Salian, A.Jagannatha, R.Kedia, M.Mandal, S.2026-02-052018Bulletin of Materials Science, 2018, 41, 5, pp. -2504707https://doi.org/10.1007/s12034-018-1644-9https://idr.nitk.ac.in/handle/123456789/24975In thiswork, the effect of annealing temperature on the conductivity of solution-combustion-synthesized calcium vanadium oxide (CVO) films was studied. Conductivity was tailored by the appearance of the phases like CaVO<inf>3</inf>, CaV<inf>2</inf>O<inf>5</inf> and Ca<inf>2</inf>V<inf>2</inf>O<inf>7</inf> as a function of annealing temperature; CaVO<inf>3</inf> and CaV<inf>2</inf>O<inf>5</inf> are responsible for high conductivity, whereas V5+ presence in Ca<inf>2</inf>V<inf>2</inf>O<inf>7</inf> contributes towards dielectric nature. Evolution of phases of CVO was identified through X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. A detailed conductivity measurement as a function of annealing temperature helps us to identify the decreasing trend of conductivity with increasing temperature up to 400°C; beyond this it behaves like an insulator. There was a stable conductivity while aging the films in ambient for a few days. This study revealed safe application temperature domain of CVO, and a clear correlation of electrical conductivity with the in-depth structural-compositional-morphological study. © Indian Academy of Sciences.AnnealingCombustionElectric conductivityFourier transform infrared spectroscopyOxidesVanadium compoundsX ray photoelectron spectroscopyAnnealing temperaturesConductivity measurementsElectrical conductivityIncreasing temperaturesPhaseSolution combustionVanadium oxide filmsVanadium oxidesOxide films