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has been cited by the following article:

• TITLE: Thermal and Structural Characterization of Transparent Rare-Earth Doped Lead Fluoride Glass-Ceramics

  AUTHORS: Chaouki Bensalem, Michel Mortier, Daniel Vivien, Patrick Gredin, Gilles Patriarche, Madjid Diaf

  KEYWORDS: Glass-Ceramic; Rare-Earth; Thermal Analysis; Devitrification; Nanocrystallite; X-Ray Diffraction

  JOURNAL NAME: New Journal of Glass and Ceramics, Vol.2 No.2, April 23, 2012

  ABSTRACT: The devitrification of glasses with composition 50GeO2-40PbO-10PbF2-xREF3, RE = Gd, Eu, 0 3+: β-PbF2 nanocrystals embedded in a glassy oxide matrix. This transformation is investigated using thermal analysis, X-ray diffraction and electron microscopy. A comparison with RE3+: β-PbF2 ceramics prepared by standard ceramic techniques is performed. The Rare Earth cations show a strong nucleating effect for the precipitation of the RE3++: β-PbF2 nanocrystals. The evolution of the unit cell parameters of the REF3: β-PbF2 solid solution results from a combined effect of Pb2+-RE3+ substitution and interstitial F– introduction. In the glass ceramics, RE3+: β-PbF2 nanocrystals are constrained by the glassy matrix when they form with a pressure equivalent to 1.6 GPa. The constrained nanocrystals can return to a relaxed state by chemical dissolution of the embedding glassy matrix, followed by thermal treatments.