The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Chemical Bonding State of Sulfur in Oxysulfide Glasses

  • Asahi, Taro (Department of Materials Engineering Niihama National collage of Technology) ;
  • Miura, Yoshinari (Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University) ;
  • Nanba, Tokuro (Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okyama University) ;
  • Yamashita, Hiroshi (Department of Applied Chemistry, Faculty of Engineering, Ehime University)
  • Published : 1999.06.01
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Abstract

Simple binary $Na_2S-SiO_2$ oxysulfide glasses were prepared by a conventional melt-quench method in order to investigate the role of sulfur in glass structure and the electronic state. By X-ray photoelectron spectroscopy(XPS) measurement, S2p binding energy of the glass was observed at approximately 161eV which was close to that of ionic $S^{2-}$. The coordinating state around silicon atoms were investigated by ${29}^Si$ MAS-NMR measurement. The chemical shift observed from NMR supported that sulfur atom was joined to a silicon atom by substituting for an oxygen atom and was present as a non-bridging sulfide ion in low alkali content. On the other hand, it could be presumed that a portion of sulfur anions existed in an isolated state from the glass-network frame at high alkali content. The state of these sulfurs was also studied by Raman spectroscopy in detail.

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References

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