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Kinetics of Crystallization in Li 2 O‐SiO 2 Glasses
Author(s) -
FREIMAN S. W.,
HENCH L. L.
Publication year - 1968
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1968.tb11898.x
Subject(s) - nucleation , crystallization , avrami equation , activation energy , kinetics , materials science , thermodynamics , rod , thermal analysis , mineralogy , chemical engineering , crystallography , chemistry , thermal , crystallization of polymers , physics , medicine , alternative medicine , pathology , quantum mechanics , engineering
The kinetics of crystallization of Li 2 Si 2 O 5 from glasses in the Li 2 O‐SiO 2 system were studied using quantitative X‐ray diffraction. Analysis of the data using the Johnson‐Mehl‐Avrami equation showed that crystallization occurred through the nucleation and growth of rods. The spherulitic nature of the crystals was substantiated by petrographic examinations of the partially crystalline glass. Analysis of the temperature dependence of the crystallization rate using a modification of the Johnson‐Mehl‐Avrami equation showed that the activation energy for nucleation was a function of composition and thermal treatment.