Fine structure, mechanical characteristics and mid-range order in xZnO–yNa2O–(1-x-y)SiO2 glasses
| Autor: | Marta Kireenko, Alexandre Chmel, Tatiana Pesina, Alfred Sinani, Lidiya Tikhonova |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Infrared Analytical chemistry Mineralogy chemistry.chemical_element 02 engineering and technology Zinc 01 natural sciences Indentation hardness Ion symbols.namesake chemistry.chemical_compound Dual role 0103 physical sciences Materials Chemistry 010306 general physics 021001 nanoscience & nanotechnology Condensed Matter Physics Silicate Electronic Optical and Magnetic Materials chemistry Ceramics and Composites symbols Boson peak 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Non-Crystalline Solids. 481:17-20 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2017.10.019 |
| Popis: | The differentiation between the behavior of Zn 2 + and Na + cations in silicate network is shaded by the lack of characteristic infrared or Raman bands belonging to the modes involving the zinc- or sodium-oxygen bonds. It was shown in this study that the stepwise substitution of Na 2 O for ZnO in the xZnO–yNa 2 O–(1-x-y)SiO 2 glasses with keeping approximately the same SiO 2 content causes the high-frequency shift of the Raman-active boson peak (BP) that is the decrease of the correlation length in structural glass heterogeneities. Intercomparison of this trend with variations of the measured structural strength and microhardness of the glasses under consideration afforded ground to suggestion of a possible dual role of Zn 2 + ion as either glass-modifier or glass former in specific compositions of zinc-alkali-silicate glasses. |
| Databáze: | OpenAIRE |
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