Please use this identifier to cite or link to this item: https://idr.l3.nitk.ac.in/jspui/handle/123456789/13467
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dc.contributor.authorKumar, B.S.
dc.contributor.authorShanmugharaj, A.M.
dc.contributor.authorKalpathy, S.K.
dc.contributor.authorAnandhan, S.
dc.date.accessioned2020-03-31T08:45:57Z-
dc.date.available2020-03-31T08:45:57Z-
dc.date.issued2017
dc.identifier.citationCeramics International, 2017, Vol.43, 9, pp.6845-6857en_US
dc.identifier.urihttp://idr.nitk.ac.in/jspui/handle/123456789/13467-
dc.description.abstractIn this study, we report for the first time the synthesis of nickel titanate (NTO) nanofibers containing a mixture of ilmenite and spinel phases of NTO, at an atypical low temperature. Precursor nanofibers produced by sol-gel electrospinning were calcined at three different temperatures to produce the NTO nanofibers. Thermal analysis along with X-ray photoelectron spectroscopy confirmed the formation of non-crystalline stable phases of TiN and Ti-O-N that restrained the formation of ilmenite NTO, and the Ni-rich environment pushed the Ti atoms to tetrahedral sites to form a defective spinel structure. The crystallite size of spinel NTO was observed to increase as a function of the calcination temperature above 700 C, as the activation energy for coalescence and growth of spinel NTO was favorable. NTO nanofibers obtained above the calcination temperature of 700 C exhibited new band gap energy around 2.5 eV in Tauc plot. Oxygen vacancies in these ceramic nanofibers decreased as the calcination temperature was increased. A hypsochromic shift of 20 nm in the photoluminescence spectra suggested that the material had a Ni2+ rich NTO (spinel). 2017 Elsevier Ltd and Techna Group S.r.l.en_US
dc.titleSome new observations on the structural and phase evolution of nickel titanate nanofibersen_US
dc.typeArticleen_US
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