%0 Journal Article
%T Synthesis and Structural Studies of Er3+ Containing Lead Cadmium Fluoroborate Glasses and Glass-Ceramics
%A Silva
%A Maur¨ªcio A.P.
%A Messaddeq
%A Younes
%A Briois
%A Valerie
%A Poulain
%A Marcel
%A Ribeiro
%A Sidney J. L.
%J Journal of the Brazilian Chemical Society
%D 2002
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532002000200011
%X the vitreous domain was established in the pbf2-cdf2-b2o 3 system from melting and quenching experiments. er3+ containing glasses were prepared and glass ceramics were obtained by selected heat-treatments. lead fluoride was identified (b-pbf2) as the crystalline phase. structural studies were performed in some glassy and partially crystallized samples by means of x-ray diffraction (xrd) and extended x-ray absorption fine structure (exafs) measurements. the role of cd2+ and pb2+ atoms on the glass network formation and also on the crystallization behavior was put forward by these techniques. after crystallization er3+ atoms segregated in the crystal phase.
%K oxifluoride glasses
%K glass-ceramics
%K x-ray absorption spectroscopy.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532002000200011&lng=en&nrm=iso&tlng=en