Phase transformations in CaCO3/iron oxide composite induced by thermal treatment and laser irradiation

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TitrePhase transformations in CaCO3/iron oxide composite induced by thermal treatment and laser irradiation
Type de publicationArticle de revue
AuteurBeuvier, Thomas , Bardeau, Jean-François , Calvignac, Brice , Corbel, G. , Hindré, François , Grenèche, J.-M. , Boury, Frank , Gibaud, Alain
EditeurWiley
TypeArticle scientifique dans une revue à comité de lecture
Année2013
LangueAnglais
DateJan-03-2013
Numéro3
Volume44
Titre de la revueJournal of Raman Spectroscopy
ISSN0377-0486
Mots-cléscalcium carbonate, iron oxide, laser irradiation, phase transition
Résumé en anglais

Calcium carbonate (CaCO3)/iron oxide composites were synthesized through a simple one-step impregnation procedure by mixing iron oxide nanoparticles (γ-Fe2O3 and Fe3O4) of about 6 nm in size and CaCO3 microparticles (Φ = 2 µm–8 µm, vaterite phase). The morphology and structural properties of CaCO3, iron oxide nanoparticles and CaCO3/iron oxide composites were characterized as a function of low iron content (0 %w to 3.2 %w) by scanning electron microscopy and transmission electron microscopy, X-ray diffraction and 57Fe Mössbauer spectrometry. The phase transformations induced by thermal treatment and laser irradiation were investigated in situ by X-ray thermodiffraction (XRTD) and Raman spectroscopy. We have shown that the phase transformations observed by XRTD are also observed under laser irradiation as a consequence of the absorption of the laser irradiation by iron oxide nanoparticles.

URL de la noticehttp://okina.univ-angers.fr/publications/ua6598
DOI10.1002/jrs.4200
Titre abrégéJ. Raman Spectrosc.