Non-isothermal crystallization kinetics of La2CaB 10O19 from glass

I. Dyamant, E. Korin, J. Hormadaly

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The non-isothermal crystallization kinetics of La2CaB 10O19 (LCB) from a La2O3-CaO-B 2O3 glass was studied. Differential thermal analysis methods were performed on three glass powders to obtain the kinetic parameters of LCB crystallization mechanism. The activation energies for overall crystallization (E), obtained by the methods of Kissinger and Ozawa, were in the range of 479-569 kJ/mol. Multiple (five) analysis methods were used to estimate the Avrami exponent (n), which could consequently be reduced into the single value of n = 3.1 ± 0.3. The growth morphology index (m) of LCB was corroborated by microscopy (optical and electron) images, which revealed a three dimensional growth. Energy dispersive spectroscopy confirmed that LCB is the crystallizing phase from the glass by an interface controlled mechanism. The parameters of the Johnson-Mehl-Avrami kinetic model for the analysis of LCB crystallization from glass were found to be n = m = 3.

Original languageEnglish
Pages (from-to)1690-1695
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume357
Issue number7
DOIs
StatePublished - 1 Apr 2011

Keywords

  • Avrami exponent
  • Crystallization kinetics
  • Differential thermal analysis
  • Glass crystallization
  • LaCaBO

ASJC Scopus subject areas

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

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