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  • Glasses in the ternary system ZnO-WO3-P2O5 were studied. The glass-forming region of the ZnO-WO3-P2O5 system has been determined and the basic physical properties of the glasses were obtained. Structure and properties of three compositional series of glasses (100-x)[0.5ZnO-0.5P(2)O(5)]-xWO(3), (50-y)ZnO-yWO(3)-50P(2)O(5) and zZnO-20WO(3)-(80-z)P2O5 were studied by Raman and P-31 NMR spectroscopies. In the compositional series (100-x)[0.5ZnO-0.5P(2)O(5)]-xWO(3) homogeneous glasses were prepared in the concentration region 0-60 mol% WO3. Their glass transition temperature (T-g) increases with increasing WO3 content within the range of 460-622 degrees C. P-31 MAS NMR spectra of the glasses show that the phosphate chains are shortened by the incorporation of tungstate structural units. The co-existence of WO4 and WO6 units in the glass structure was seen in glasses with a high ZnO content, while most of the studied glasses contain tungsten atoms in WO6 octahedra. Raman spectra reveal the existence of isolated WO6 units especially in the glasses with a low WO3 content and a high P2O5 content. Clustering of WO6 units by the formation W-O-W bonds takes place in glasses with a high WO3 content as observed from Raman spectra.
  • Glasses in the ternary system ZnO-WO3-P2O5 were studied. The glass-forming region of the ZnO-WO3-P2O5 system has been determined and the basic physical properties of the glasses were obtained. Structure and properties of three compositional series of glasses (100-x)[0.5ZnO-0.5P(2)O(5)]-xWO(3), (50-y)ZnO-yWO(3)-50P(2)O(5) and zZnO-20WO(3)-(80-z)P2O5 were studied by Raman and P-31 NMR spectroscopies. In the compositional series (100-x)[0.5ZnO-0.5P(2)O(5)]-xWO(3) homogeneous glasses were prepared in the concentration region 0-60 mol% WO3. Their glass transition temperature (T-g) increases with increasing WO3 content within the range of 460-622 degrees C. P-31 MAS NMR spectra of the glasses show that the phosphate chains are shortened by the incorporation of tungstate structural units. The co-existence of WO4 and WO6 units in the glass structure was seen in glasses with a high ZnO content, while most of the studied glasses contain tungsten atoms in WO6 octahedra. Raman spectra reveal the existence of isolated WO6 units especially in the glasses with a low WO3 content and a high P2O5 content. Clustering of WO6 units by the formation W-O-W bonds takes place in glasses with a high WO3 content as observed from Raman spectra. (en)
Title
  • Glass-forming ability and structure of glasses in the ZnO-WO3-P2O5 system
  • Glass-forming ability and structure of glasses in the ZnO-WO3-P2O5 system (en)
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  • Glass-forming ability and structure of glasses in the ZnO-WO3-P2O5 system
  • Glass-forming ability and structure of glasses in the ZnO-WO3-P2O5 system (en)
skos:notation
  • RIV/00216275:25310/12:39895275!RIV13-GA0-25310___
http://linked.open...avai/riv/aktivita
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  • I, P(GAP106/10/0283)
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  • 3
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  • 138185
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  • RIV/00216275:25310/12:39895275
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  • Raman spectra; structure and properties; glass structure; glass forming ability; 31P MAS-NMR (en)
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  • GB - Spojené království Velké Británie a Severního Irska
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  • [52E5AB5E2726]
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  • Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B
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  • 53
http://linked.open...iv/tvurceVysledku
  • Gregora, Ivan
  • Koudelka, Ladislav
  • Montagne, Lionel
  • Mošner, Petr
  • Delevoye, Laurent
  • Šubčík, Jiří
http://linked.open...ain/vavai/riv/wos
  • 000308900000004
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  • 1753-3562
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  • 25310
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