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Hydrothermal synthesis of NaxFexTi2-xO4 from natural ilmenite sand: A CaFe2O4 structure type compound

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2008
Authors
Marinković, Bojan A.
Mančić, Lidija
Jardim, Paula M.
Milošević, Olivera
Rizzo, Fernando
Article (Published version)
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Abstract
NaxFexTi2-xO4 a compound from the CaFe2O4 structure type group, was obtained via hydrothermal route at a temperature lower than 200  {ring operator}C for the first time. Natural ilmenite sand, a low cost reagent, was used as a precursor and reacted with 10 mol/l NaOH for 70 h to obtained high yield (92% wt) of NaxFexTi2-xO4 with x ∼ 0.76 - 0.79, as evaluated through the Rietveld refinement and quantitative phase analysis of X-ray powder diffraction data. Transmission Electron Microscopy showed that NaxFexTi2-xO4 appears in submicron to micron crystals with well-defined facets, growing along the [001] crystallographic direction, which means that the tunnels, a peculiarity of this crystal structure, are oriented along the direction of growth. © 2007 Elsevier Ltd. All rights reserved.
Keywords:
CaFe2O4 structure type / hydrothermal synthesis / scanning electron microscopy / X-ray scattering / transmission electron microscopy
Source:
Solid State Communications, 2008, 145, 7-8, 346-350
Publisher:
  • Elsevier
Projects:
  • Brazilian National Council for the Scientific and Technological Development (CNPq)
  • Ministry of Science and Environmental Protection of Serbia (post-doctoral scholarship)

DOI: 10.1016/j.ssc.2007.12.006

ISSN: 0038-1098

WoS: 000253434100005

Scopus: 2-s2.0-38649103482
[ Google Scholar ]
6
6
URI
http://dais.sanu.ac.rs/123456789/3587
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences of SASA

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