| | 1 | Author
| G. Herms, J. Sakowski, W. Gerike, Dörte Stachel | Requires cookie* | | | Title
| Structural Changes in Two Different Types of Oxide Glass Melts: Borates and Metaphosphates  | | | | Abstract
| X-ray diffraction experiments of molten oxide glasses, which give new insights into the structure of melts, were carried out. Using modern means (synchrotron radiation, image plates, container-less high-temperature technique) it could be shown that the short range order of melt and solid glass is often qual-itatively different. If vitreous B 2 0 3 or binary borate glasses with low content of network modifier are heated up above T & , the network topology begins to alter. With rising temperature more and more of the boroxol groups are replaced by independent B0 3 groups. While melting a metaphosphate glass, how-ever, structural changes of another kind take place. In solid glass the environment of the network mod-ifier ions is similar to the one found in crystalline modifications, and their distances to the surrounding P0 4 tetrahedra have narrow distributions. In the melt, however, these distances scarcely become evi-dent, probably owing to the increased thermal motion of the modifier ions. | | | |
Reference
| Z. Naturforsch. 53a, 874—882 (1998); received February 17 1997 | | | |
Published
| 1998 | | | |
Keywords
| X-ray Diffraction, Short Range Order, Borate Glasses, Phosphate Glasses, Glass Transition | | | |
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| default:Reihe_A/53/ZNA-1998-53a-0874.pdf | | | | Identifier
| ZNA-1998-53a-0874 | | | | Volume
| 53 | |
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