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Article Dans Une Revue Materials Chemistry and Physics Année : 2008

Synthesis of hafnium germanate (HfGeO4) particles: Impact of crystallization route on X/UV conversion properties

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Jérémy Balencie
  • Fonction : Auteur
Laurent Levy
  • Fonction : Auteur

Résumé

The crystallization route - calcination or hydrothermal ripening - of an amorphous hafnium and germanium oxide coprecipitate determines the X/UV conversion properties of the resulting hafnium germanate (HfGeO4). The calcination of the amorphous precipitate leads to micrometric aggregated particles exhibiting strong X/UV conversion whereas its hydrothermal crystallization resulted in well individualized nanoparticles with no X/UV conversion property. To explain these phenomena, the crystalline structure and chemical composition of the final products were investigated with X-ray diffraction (XRD) and inductively coupled plasma-mass spectrometry (ICP-MS). The key result is that germanium is partially solubilized from the amorphous precursor in hydrothermal conditions, resulting in the crystallization of a Ge deficient hafnium germanate possessing no X/UV conversion properties.

Dates et versions

hal-00795386 , version 1 (28-02-2013)

Identifiants

Citer

Jérémy Balencie, Laurent Levy, Jean-François Hochepied. Synthesis of hafnium germanate (HfGeO4) particles: Impact of crystallization route on X/UV conversion properties. Materials Chemistry and Physics, 2008, 112, pp.546-550. ⟨10.1016/j.matchemphys.2008.05.087⟩. ⟨hal-00795386⟩
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