Abstract
The 720 and 780 cm-1 components of the deconvoluted Raman spectra of glasses in the systems RnO-TeO2 (R=Li, Na, K, Ba, Zn) were attributed to TeO3 groups and the 665 cm-1 band was to TeO4 groups. The theoretical values of the molar ratio TeO3/TeO4 derived from an assumed vitrification reaction were compared with the ratio derived from the intensity ratios of the Raman bands, I(720) /I(665) and I(780)/I(665). It was indicated that [O2/2Te=O] and [O1/2Te(=O)-O]- units were induced by the addition of network modifying oxides in the composition range of lower atomic ratio O/Te. It was proposed that the decrease in the rate of increase of the ratio TeO3/TeO4 in the range of larger O/Te was due to the equilibrium TeO4/2↔[O12/2Te=O] favoring the former unit.
Original language | English |
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Pages (from-to) | 473-477 |
Number of pages | 5 |
Journal | journal of the society of materials science, japan |
Volume | 42 |
Issue number | 476 |
DOIs | |
Publication status | Published - 1993 |
Keywords
- Constitution
- Glass
- Raman spectrum
- Tellurite
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering