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Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2020

Non network-former cations in oxide glasses spotted by Raman scattering

Bernard Hehlen
Daniel R. Neuville

Résumé

The depolarized Raman spectra can be used as a probe to reveal the presence of non-network formers in oxide glasses. Two spectral responses involving the cations are observed below 400 cm−1 in more than 30 compositions of binary and ternary aluminosilicates. One of the two bands arises solely from cations close to non-bridging oxygen providing thereby a simple test for qualifying the polymerization state of the glass. The second feature involves all cations whatever their role in the glass and is found to be twofold: one contribution arises from cations charge compensating (AlO4)− tetrahedra and the other one from network modifier cations. These results confirm the net vibrational contrast of cations depending on their structural surrounding.
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Dates et versions

hal-02989584 , version 1 (12-11-2020)

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Bernard Hehlen, Daniel R. Neuville. Non network-former cations in oxide glasses spotted by Raman scattering. Physical Chemistry Chemical Physics, 2020, 22 (22), pp.12724-12731. ⟨10.1039/d0cp00630k⟩. ⟨hal-02989584⟩
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