Brillouin scattering in alkali metaphosphate glasses and melts

D. L. Sidebottom; P. F. Green; R. K. Brow

doi:10.1016/S0022-2860(98)00872-2

Brillouin scattering in alkali metaphosphate glasses and melts

D. L. Sidebottom, P. F. Green, R. K. Brow

Department of Physics

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14 Scopus citations

Abstract

We report the results of Brillouin scattering measurements performed on a series of alkali metaphosphate glasses and melts including the mixed alkali composition. Using independent viscosity data, we have applied a time- temperature superposition approach to obtain from the relevant features of the Brillouin spectra the relaxation characteristics of the complex longitudinal elastic modulus. A mixed alkali effect is evidenced in the Brillouin scattering which occurs in the gigahertz range. We find a relaxation process that can be described by a Kohlrausch function with β ≃ 0.30 for single alkali compositions, but is narrower (β ≃ 0.40) at the mixed alkali composition.

Original language	English (US)
Pages (from-to)	219-226
Number of pages	8
Journal	Journal of Molecular Structure
Volume	479
Issue number	2-3
DOIs	https://doi.org/10.1016/S0022-2860(98)00872-2
State	Published - Apr 27 1999

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All Science Journal Classification (ASJC) codes

Analytical Chemistry
Spectroscopy
Organic Chemistry
Inorganic Chemistry

Cite this

Sidebottom, D. L., Green, P. F., & Brow, R. K. (1999). Brillouin scattering in alkali metaphosphate glasses and melts. Journal of Molecular Structure, 479(2-3), 219-226. https://doi.org/10.1016/S0022-2860(98)00872-2

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AB - We report the results of Brillouin scattering measurements performed on a series of alkali metaphosphate glasses and melts including the mixed alkali composition. Using independent viscosity data, we have applied a time- temperature superposition approach to obtain from the relevant features of the Brillouin spectra the relaxation characteristics of the complex longitudinal elastic modulus. A mixed alkali effect is evidenced in the Brillouin scattering which occurs in the gigahertz range. We find a relaxation process that can be described by a Kohlrausch function with β ≃ 0.30 for single alkali compositions, but is narrower (β ≃ 0.40) at the mixed alkali composition.

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10.1016/S0022-2860(98)00872-2