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Structural investigation of SnO-B2O3 glasses by solid-state NMR and X-ray photoelectron spectroscopy |
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| Authors: | Akitoshi Hayashi Miyuki NakaiMasahiro Tatsumisago Tsutomu MinamiYusuke Himei Yoshinari MiuraMotomi Katada |
| Institution: | a Department of Applied Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai, Osaka 599-8531, Japan b Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan c Department of Environmental Chemistry and Materials, Okayama University, Tsushima-naka, Okayama 700-8530, Japan d Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan |
| Abstract: | Local structure of the SnO-B2O3 glasses was investigated using several spectroscopic techniques. 11B MAS-NMR spectra suggested that BO4 tetrahedral units maximized at around the composition with 50 mol% SnO. The BO4 units were still present at compositions with high SnO content (67 mol% SnO), suggesting that SnO acted not only as a network modifier but also as a network former. O1s photoelectron spectra revealed that the addition of small amounts of SnO formed non-bridging oxygens (NBO) (B-O?Sn) and the amounts of NBO increased with an increase in SnO content. 119Sn Mössbauer spectra indicated that Sn was present only as Sn(II) in the glasses. The structure of the SnO-B2O3 glasses was compared with that of conventional alkali borate glasses and lead borate glasses. The thermal and viscous properties of these glasses were discussed on the basis of the glass structure revealed in the present study. |
| Keywords: | B140 N220 X110 |
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