High-resolution short-range order study of tellurite glasses
| Autor: | S. Neov, S.N. Ishmaev, V. Kozhukharov |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Chemistry
Coordination number Neutron diffraction Analytical chemistry High resolution Condensed Matter Physics Radial distribution function Electronic Optical and Magnetic Materials Crystallography Materials Chemistry Ceramics and Composites Short range order Neutron source Structure factor Diffractometer |
| Zdroj: | Journal of Non-Crystalline Solids. :61-64 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/0022-3093(95)00333-9 |
| Popis: | The short-range atomic order in tellurite glasses containing 2 and 4 mol% P 2 O 5 as a co-glass-former has been investigated by two neutron diffraction techniques. The structure factor, S(Q), was measured up to 350 nm -1 by the time-of-flight method using a pulsed neutron source. Conventional neutron diffraction measurements were carried out on a two-axis diffractometer. An asymmetric maximum, located at 0.195 nm, has been observed in the radial distribution function of the tellurite glass with 2 mol% P 2 O 5 . This maximum involves the Te-O pair distribution and the calculated coordination number of the Te atoms is 3.8. Increasing the P 2 O 5 content up to 4 mol% leads to a splitting of the first coordination maximum, with two subpeaks at 0.190 and 0.214 nm. The interpretation of the experimental results was made through a correlation with crystal-like model radial distribution functions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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