Brillouin scattering in alkali metaphosphate glasses and melts

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

Research output: Contribution to journalArticle

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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 languageEnglish (US)
Pages (from-to)219-226
Number of pages8
JournalJournal of Molecular Structure
Volume479
Issue number2-3
DOIs
StatePublished - Apr 27 1999

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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