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DC Field | Value | Language |
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dc.contributor.author | Kumar, B.S. | |
dc.contributor.author | Shanmugharaj, A.M. | |
dc.contributor.author | Kalpathy, S.K. | |
dc.contributor.author | Anandhan, S. | |
dc.date.accessioned | 2020-03-31T08:45:57Z | - |
dc.date.available | 2020-03-31T08:45:57Z | - |
dc.date.issued | 2017 | |
dc.identifier.citation | Ceramics International, 2017, Vol.43, 9, pp.6845-6857 | en_US |
dc.identifier.uri | http://idr.nitk.ac.in/jspui/handle/123456789/13467 | - |
dc.description.abstract | In 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.title | Some new observations on the structural and phase evolution of nickel titanate nanofibers | en_US |
dc.type | Article | en_US |
Appears in Collections: | 1. Journal Articles |
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