Rare earth-dependent trend of the glass transition activation energy of doped phosphate glasses: Calorimetric analysis

Mariana Sendova, José A. Jiménez, Chandler Honaman

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Eight types of rare earth (RE)-doped barium phosphate glasses have been studied by differential scanning calorimetry (DSC) in the glass transition region. Proposed is a concurrent analysis of a family of heat flow data assessing the glass transition activation energies. Furthermore, the DSC data indicate correlation of the activation energy with the ionic radius of the RE dopant, in agreement with the bond strength modifications suggested by the Raman data. Estimated activation energy values between 4.0(2) eV and 4.9(2) eV are in support of [Formula presented] bond exchange theory of the glass transition. It is proposed that the measured activation energy can serve as a relative quantifier of the intermediate-range order of the glass structure.

Original languageEnglish (US)
Pages (from-to)18-22
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume450
DOIs
StatePublished - Oct 15 2016
Externally publishedYes

Keywords

  • Activation energy
  • Calorimetry
  • Glass transition
  • Phosphate glasses

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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