Influence of Sn<sup>4+</sup> and Sn<sup>4+</sup>/Mg<sup>2+</sup> doping on structural features and visible absorption properties of <i>α</i>-Fe<sub>2</sub>O<sub>3</sub> hematite
Langue
en
Article de revue
Ce document a été publié dans
Journal of Solid State Chemistry. 2010, vol. 183, n° 9, p. 2101-2109
Elsevier
Résumé en anglais
Pure, Sn-doped and Mg/Sn co-doped <i>α</i>-Fe<sub>2</sub>O<sub>3</sub> hematite samples were synthesized by precipitation process. Fe<sub>2</sub>O<sub>3</sub> is the most popular red mineral pigment which is used largely ...Lire la suite >
Pure, Sn-doped and Mg/Sn co-doped <i>α</i>-Fe<sub>2</sub>O<sub>3</sub> hematite samples were synthesized by precipitation process. Fe<sub>2</sub>O<sub>3</sub> is the most popular red mineral pigment which is used largely in traditional ceramics, tar and concrete. The compounds were characterized by powder X-ray diffraction (XRD), scanning transmission electronic microscopy (energy dispersive X-ray cartography), Mössbauer spectroscopy, magnetic investigations versus temperature and visible-NIR spectroscopy. Both 57Fe and 119Sn Mössbauer analyses combined with rietveld XRD refinements are the ideal techniques to characterize tin-iron oxides. Hence, thanks to these techniques it was shown how the synthesis temperature influences directly the grain size and the dopants concentration limit which can be incorporated into the host hematite matrix...< Réduire
Mots clés en anglais
Hematite
Pigment
X-ray diffraction
Mössbauer spectroscopy
Visible-NIR spectroscopy
Origine
Importé de halUnités de recherche