Barrier to crystal nucleation in anorthite

D. Cranmer, R. Salomaa, H. Yinnon, Donald R Uhlmann

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The kinetics of crystal nucleation in anorthite (CaAl2Si2O8) have been determined over the range of undercooling between 475 and 600°C. The plot of In(Ivη) versus (ΔT|staggered|r2T|staggered|r3)-1 is a straight line of negative slope over the temperature range investigated. The slope of this relation indicates a free energy barrier to crystal nucleation of about 82 kT* (where T* = 0.8TE). The intercept at (ΔT|staggered|r2Tstaggered|r3)-1 = 0 is approximately 1027 cm-3 s-1P. Samples of anorthite glass were also analyzed by differential thermal analysis, with the temperature of maximum crystallization rate being determined as a function of heating rate. From this variation, a nucleation barrier of about 80 kT* was estimated. The combined results are in good agreement with predictions of the classical theory of homogeneous nucleation.

Original languageEnglish (US)
Pages (from-to)127-136
Number of pages10
JournalJournal of Non-Crystalline Solids
Volume45
Issue number1
DOIs
StatePublished - 1981
Externally publishedYes

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Nucleation
nucleation
Crystals
crystals
slopes
Undercooling
Energy barriers
supercooling
Crystallization
Heating rate
Differential thermal analysis
Free energy
thermal analysis
plots
free energy
crystallization
Glass
Temperature
Kinetics
heating

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Barrier to crystal nucleation in anorthite. / Cranmer, D.; Salomaa, R.; Yinnon, H.; Uhlmann, Donald R.

In: Journal of Non-Crystalline Solids, Vol. 45, No. 1, 1981, p. 127-136.

Research output: Contribution to journalArticle

Cranmer, D. ; Salomaa, R. ; Yinnon, H. ; Uhlmann, Donald R. / Barrier to crystal nucleation in anorthite. In: Journal of Non-Crystalline Solids. 1981 ; Vol. 45, No. 1. pp. 127-136.
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