Structure of lead oxyfluorosilicate glasses: X-ray photoelectron and nuclear magnetic resonance spectroscopy and molecular dynamics simulation

Satoshi Hayakawa, Akiyoshi Osaka, Hironori Nishioka, Syuji Matsumoto, Yoshinari Miura

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

X-ray photoelectron (XPS) and 29Si magic angle spinning (MAS)-NMR spectroscopy have been used to examine the chemical states of fluorine, oxygen, silicon and lead atoms in the glasses of composition xPbF2 · (100-y-x)PbO· ySiO2 (x = 0, 5, 10, 15, 20, 30 mol%, y = 30, 50, 60 mol%). The analysis of the F Is spectra indicated that Pb2+ and F- ions are preferentially located among the Si-O skeleton forming ionic Pb-F clusters. The fraction of the bridging (BO) and non-bridging oxygen (NBO) atoms was derived from the O 1s spectra. The network of the fluorine-containing glasses was concluded to depend on the ratio PbO/SiO2; when the ratio PbO/SiO2 was lower than 0.5, not only Pb atoms but also F atoms play a role as network modifiers, while when the ratio PbO/SiO2 is higher than 1.33, part of Pb atoms plays a role as a glass network former.

Original languageEnglish
Pages (from-to)103-118
Number of pages16
JournalJournal of Non-Crystalline Solids
Volume272
Issue number2-3
DOIs
Publication statusPublished - Aug 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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