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

Research output: Contribution to journal › Article › peer-review

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

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Spectroscopy
Organic Chemistry
Inorganic Chemistry

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title = "Brillouin scattering in alkali metaphosphate glasses and melts",

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.",

author = "Sidebottom, {D. L.} and Green, {P. F.} and Brow, {R. K.}",

note = "Funding Information: The assistance of D. Bencoe and E. Carleton for sample preparation and viscosity measurements is gratefully acknowledged. This work was performed at Sandia National Laboratories. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000. ",

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doi = "10.1016/S0022-2860(98)00872-2",

language = "English (US)",

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T1 - Brillouin scattering in alkali metaphosphate glasses and melts

AU - Sidebottom, D. L.

AU - Green, P. F.

AU - Brow, R. K.

N1 - Funding Information: The assistance of D. Bencoe and E. Carleton for sample preparation and viscosity measurements is gratefully acknowledged. This work was performed at Sandia National Laboratories. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-AC04-94AL85000.

PY - 1999/4/27

Y1 - 1999/4/27

N2 - 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.

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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U2 - 10.1016/S0022-2860(98)00872-2

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JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

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