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Updated: Jun 29, 2026
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Fluid-cell Raman Spectroscopy for operando Studies of Reaction and Transport Phenomena during Silicate Glass Corrosion
Published on: May 9, 2025
[Raman spectroscopic study of binary PbO-TeO2 glasses]
Li Huang1, Jing-Lin You, Hui Chen
1School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China.
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|October 11, 2008
Summary
Raman spectroscopy reveals that adding lead oxide (PbO) to tellurite glasses transforms four-coordinate tellurite units into three-coordinate ones, increasing non-bridging oxygen bonds. This structural change impacts glass properties at various temperatures.
Area of Science:
- Materials Science
- Solid State Chemistry
- Spectroscopy
Context:
- Tellurite glasses are amorphous solids containing tellurium dioxide.
- Lead oxide (PbO) is a common additive used to modify glass properties.
- Understanding structural changes in glasses is crucial for material design.
Purpose:
- To investigate the structural evolution of lead tellurite glasses and their melts using Raman spectroscopy.
- To correlate changes in coordination and bonding with PbO concentration.
- To analyze the effect of temperature on the glass structure and spectral features.
Summary:
- Raman spectra indicate that increasing PbO concentration in tellurite glasses leads to the conversion of four-coordinate tellurite units to three-coordinate units, accompanied by an increase in non-bridging oxygen bonds (NBO).
- Specific Raman peaks were assigned to vibrations associated with bridging and non-bridging oxygen in different coordination states (Q(b), Q(nb), T(nb)).
- At PbO concentrations above 50%, three-coordinate units become significant, and the structure shifts from predominantly four-coordinate units.
Impact:
- The study provides insights into the structural basis for property modifications in lead tellurite glasses.
- Observed spectral shifts and peak broadening at high temperatures explain the behavior of these glasses near and above their melting points.
- Findings contribute to the understanding of glass network structures and their response to compositional and thermal variations.
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