TY - JOUR
T1 - Structure of lead oxyfluorosilicate glasses
T2 - X-ray photoelectron and nuclear magnetic resonance spectroscopy and molecular dynamics simulation
AU - Hayakawa, Satoshi
AU - Osaka, Akiyoshi
AU - Nishioka, Hironori
AU - Matsumoto, Syuji
AU - Miura, Yoshinari
N1 - Funding Information:
This work was supported by Grant-in-Aid for Scientific Research on Priority Areas, the Ministry of Education, Science, Culture and Sports (Japan), No. 07239235. We are grateful to the SS-NMR Division of the VB Laboratory of Okayama University for 29 Si MAS-NMR experiments.
PY - 2000/8
Y1 - 2000/8
N2 - 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.
AB - 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.
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U2 - 10.1016/S0022-3093(00)00233-7
DO - 10.1016/S0022-3093(00)00233-7
M3 - Article
AN - SCOPUS:0000091113
VL - 272
SP - 103
EP - 118
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 2-3
ER -