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The effect of gadolinium addition on the surface structure of Bi 2 O 3 –GeO 2 glasses and vitroceramics
Author(s) -
Simon V.,
Ponta O.,
Simon S.,
Udvar D. A.,
Neumann M.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200723269
Subject(s) - gadolinium , x ray photoelectron spectroscopy , crystallization , oxide , materials science , analytical chemistry (journal) , metal , crystallography , chemistry , mineralogy , nuclear magnetic resonance , metallurgy , physics , organic chemistry , chromatography
Abstract Heavy metal oxide glasses and vitroceramics belonging to the Bi 2 O 3 –GeO 2 –Gd 2 O 3 system are investigated. The changes induced by heat treatment in the elemental composition on sample surfaces are related to the local order changes. O 1s and Bi 4f core level X‐ray photoelectron spectra evidence the local order changes caused by gadolinium addition to the Bi 2 O 3 –GeO 2 matrix and by partial crystallisation of the precursor glass samples. The addition of gadolinium to the Bi 2 O 3 –GeO 2 glass matrix leads to a reduction of the number of bridging oxygens and a depolymerisation of the glass structure. The number of bridging oxygens increases on heat treatment of the samples. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)