The effect of gadolinium addition on the surface structure of Bi2O3-GeO2glasses and vitroceramics

✍ Scribed by Simon, V. ;Ponta, O. ;Simon, S. ;Udvar, D. A. ;Neumann, M.

• Book ID: 105364483
• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 422 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200723269

✦ Synopsis

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)