Study of the mixed alkali effect in lithium and sodium metaphosphate glass-forming liquids by photon correlation spectroscopy

J. R. Changstrom, David L. Sidebottom

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We report results of an extensive study of the structural relaxation occurring in mixed alkali metaphosphate liquids obtained by photon correlation spectroscopy. Values for the glass transition temperature, the fragility index, and the heterogeneity parameter (also known as the Kohlrausch exponent) are extracted from the measurements and are all shown to exhibit a mixed alkali effect wherein nonlinear variations with mixing occur. The depression in the glass transition temperature is shown to be the direct result of mechanical relaxations, present in the solid, which prematurely loosen the glass structure. A minimum in the fragility index is believed to be an artifact of the resulting depression of the glass transition temperature.

Original languageEnglish
Article number285103
JournalJournal of Physics Condensed Matter
Volume20
Issue number28
DOIs
StatePublished - Jul 16 2008

Fingerprint

Photon correlation spectroscopy
Alkalies
Lithium
glass transition temperature
alkalies
lithium
Sodium
sodium
Glass
glass
photons
Liquids
liquids
spectroscopy
Anelastic relaxation
Structural relaxation
artifacts
exponents
Glass transition temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

@article{0c2b071c1f9646109213be3c447e6e41,
title = "Study of the mixed alkali effect in lithium and sodium metaphosphate glass-forming liquids by photon correlation spectroscopy",
abstract = "We report results of an extensive study of the structural relaxation occurring in mixed alkali metaphosphate liquids obtained by photon correlation spectroscopy. Values for the glass transition temperature, the fragility index, and the heterogeneity parameter (also known as the Kohlrausch exponent) are extracted from the measurements and are all shown to exhibit a mixed alkali effect wherein nonlinear variations with mixing occur. The depression in the glass transition temperature is shown to be the direct result of mechanical relaxations, present in the solid, which prematurely loosen the glass structure. A minimum in the fragility index is believed to be an artifact of the resulting depression of the glass transition temperature.",
author = "Changstrom, {J. R.} and Sidebottom, {David L.}",
year = "2008",
month = "7",
day = "16",
doi = "10.1088/0953-8984/20/28/285103",
language = "English",
volume = "20",
journal = "Journal of Physics Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing Ltd.",
number = "28",

}

TY - JOUR

T1 - Study of the mixed alkali effect in lithium and sodium metaphosphate glass-forming liquids by photon correlation spectroscopy

AU - Changstrom, J. R.

AU - Sidebottom, David L.

PY - 2008/7/16

Y1 - 2008/7/16

N2 - We report results of an extensive study of the structural relaxation occurring in mixed alkali metaphosphate liquids obtained by photon correlation spectroscopy. Values for the glass transition temperature, the fragility index, and the heterogeneity parameter (also known as the Kohlrausch exponent) are extracted from the measurements and are all shown to exhibit a mixed alkali effect wherein nonlinear variations with mixing occur. The depression in the glass transition temperature is shown to be the direct result of mechanical relaxations, present in the solid, which prematurely loosen the glass structure. A minimum in the fragility index is believed to be an artifact of the resulting depression of the glass transition temperature.

AB - We report results of an extensive study of the structural relaxation occurring in mixed alkali metaphosphate liquids obtained by photon correlation spectroscopy. Values for the glass transition temperature, the fragility index, and the heterogeneity parameter (also known as the Kohlrausch exponent) are extracted from the measurements and are all shown to exhibit a mixed alkali effect wherein nonlinear variations with mixing occur. The depression in the glass transition temperature is shown to be the direct result of mechanical relaxations, present in the solid, which prematurely loosen the glass structure. A minimum in the fragility index is believed to be an artifact of the resulting depression of the glass transition temperature.

UR - http://www.scopus.com/inward/record.url?scp=47249130743&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=47249130743&partnerID=8YFLogxK

U2 - 10.1088/0953-8984/20/28/285103

DO - 10.1088/0953-8984/20/28/285103

M3 - Article

VL - 20

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 28

M1 - 285103

ER -