Nanocrystalline powders of undoped and lanthanide-doped scandium oxide were prepared by propellant synthesis and characterized by x-ray powder diffraction, electron microscopy, EDX spectroscopy and luminescence spectroscopy. The obtained material has the Sc2O3 cubic structure (space group ) with unit cell parameter increasing with the size of the dopant. The crystallite size is in the range 20-40 nm. The lanthanide-doped samples form Sc2-xLnxO3 solid solutions with x≈0.2 (Ln = Eu or Er). No inhomogeneity was found by microanalysis on the micron scale. The emission spectrum of the Eu3+ doped Sc 2O3 sample shows strong bands in the visible region assigned to 4f-4f transitions of the lanthanide ions

Structural characterization and luminescence properties of nanostructured lanthanide-doped Sc2O3 prepared by propellant synthesis

SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni;
2006-01-01

Abstract

Nanocrystalline powders of undoped and lanthanide-doped scandium oxide were prepared by propellant synthesis and characterized by x-ray powder diffraction, electron microscopy, EDX spectroscopy and luminescence spectroscopy. The obtained material has the Sc2O3 cubic structure (space group ) with unit cell parameter increasing with the size of the dopant. The crystallite size is in the range 20-40 nm. The lanthanide-doped samples form Sc2-xLnxO3 solid solutions with x≈0.2 (Ln = Eu or Er). No inhomogeneity was found by microanalysis on the micron scale. The emission spectrum of the Eu3+ doped Sc 2O3 sample shows strong bands in the visible region assigned to 4f-4f transitions of the lanthanide ions
CRYSTAL-FIELD STRENGTH; X-RAY-DIFFRACTION; COMBUSTION SYNTHESIS
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/304527
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 25
social impact