Pressure dependent conductivities and activation volumes in LixNa(1-x)PO3 glasses: evidence for a new matrix-mediated coupling mechanism in mixed-cation glasses?

P. W. S. K. Bandaranayake, Corrie Thomas Imrie, Malcolm David Ingram

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38 Citations (Scopus)

Abstract

Ionic conductivities in a range of LixNa(1-x)PO3 glasses are reported as a function of both temperature and pressure. This series of mixed-cation glasses characteristically exhibits minima in glass transition temperatures and in ionic conductivities, and a maximum in the activation energy for ionic conductivity. There is also a maximum in the corresponding activation volume (DeltaV*), where DeltaV*(max) congruent to DeltaV*(Li glass) + DeltaV*(Na glass). It is suggested that this approximate equality is evidence for direct coupling between Li+ and Na+ ion motions, which is mediated through the glass matrix. This coupling process directly influences the mechanism of ion transport in mixed-cation glasses and could be responsible for many features of the mixed-alkali effect.

Original languageEnglish
Pages (from-to)3209-3213
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume4
DOIs
Publication statusPublished - 2002

Keywords

  • SITE ENERGY-DISTRIBUTION
  • ELECTRICAL-CONDUCTIVITY
  • IONIC-CONDUCTIVITY
  • SILICATE-GLASSES
  • ALKALI GLASSES
  • TRANSPORT
  • NETWORK

Cite this

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title = "Pressure dependent conductivities and activation volumes in LixNa(1-x)PO3 glasses: evidence for a new matrix-mediated coupling mechanism in mixed-cation glasses?",
abstract = "Ionic conductivities in a range of LixNa(1-x)PO3 glasses are reported as a function of both temperature and pressure. This series of mixed-cation glasses characteristically exhibits minima in glass transition temperatures and in ionic conductivities, and a maximum in the activation energy for ionic conductivity. There is also a maximum in the corresponding activation volume (DeltaV*), where DeltaV*(max) congruent to DeltaV*(Li glass) + DeltaV*(Na glass). It is suggested that this approximate equality is evidence for direct coupling between Li+ and Na+ ion motions, which is mediated through the glass matrix. This coupling process directly influences the mechanism of ion transport in mixed-cation glasses and could be responsible for many features of the mixed-alkali effect.",
keywords = "SITE ENERGY-DISTRIBUTION, ELECTRICAL-CONDUCTIVITY, IONIC-CONDUCTIVITY, SILICATE-GLASSES, ALKALI GLASSES, TRANSPORT, NETWORK",
author = "Bandaranayake, {P. W. S. K.} and Imrie, {Corrie Thomas} and Ingram, {Malcolm David}",
year = "2002",
doi = "10.1039/b201215d",
language = "English",
volume = "4",
pages = "3209--3213",
journal = "Physical Chemistry Chemical Physics",
issn = "1463-9076",
publisher = "ROYAL SOC CHEMISTRY",

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TY - JOUR

T1 - Pressure dependent conductivities and activation volumes in LixNa(1-x)PO3 glasses: evidence for a new matrix-mediated coupling mechanism in mixed-cation glasses?

AU - Bandaranayake, P. W. S. K.

AU - Imrie, Corrie Thomas

AU - Ingram, Malcolm David

PY - 2002

Y1 - 2002

N2 - Ionic conductivities in a range of LixNa(1-x)PO3 glasses are reported as a function of both temperature and pressure. This series of mixed-cation glasses characteristically exhibits minima in glass transition temperatures and in ionic conductivities, and a maximum in the activation energy for ionic conductivity. There is also a maximum in the corresponding activation volume (DeltaV*), where DeltaV*(max) congruent to DeltaV*(Li glass) + DeltaV*(Na glass). It is suggested that this approximate equality is evidence for direct coupling between Li+ and Na+ ion motions, which is mediated through the glass matrix. This coupling process directly influences the mechanism of ion transport in mixed-cation glasses and could be responsible for many features of the mixed-alkali effect.

AB - Ionic conductivities in a range of LixNa(1-x)PO3 glasses are reported as a function of both temperature and pressure. This series of mixed-cation glasses characteristically exhibits minima in glass transition temperatures and in ionic conductivities, and a maximum in the activation energy for ionic conductivity. There is also a maximum in the corresponding activation volume (DeltaV*), where DeltaV*(max) congruent to DeltaV*(Li glass) + DeltaV*(Na glass). It is suggested that this approximate equality is evidence for direct coupling between Li+ and Na+ ion motions, which is mediated through the glass matrix. This coupling process directly influences the mechanism of ion transport in mixed-cation glasses and could be responsible for many features of the mixed-alkali effect.

KW - SITE ENERGY-DISTRIBUTION

KW - ELECTRICAL-CONDUCTIVITY

KW - IONIC-CONDUCTIVITY

KW - SILICATE-GLASSES

KW - ALKALI GLASSES

KW - TRANSPORT

KW - NETWORK

U2 - 10.1039/b201215d

DO - 10.1039/b201215d

M3 - Article

VL - 4

SP - 3209

EP - 3213

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

ER -