Journal of Materials Science and Engineering with Advanced Technology
Author's: G. A. SYCHEVA
Pages: [107] - [131]
Received Date: October 25, 2011
Submitted by:
The nucleation in phase separated and no phase separated glasses of
the lithium silicate system in wide region of compositions has been
investigated. The glasses of 
(where x = 23.4, 26.0, 29.1, 32.5,
32.97, 33.5, 33.85, 34.72, 36.2, 37.0, 37.98, 39.0, 41.15, 44.11, and
compositions have been homogenized by using
the previously established special temperature-time conditions, which
make it possible to provide a maximum dehydration and removal of
bubbles from the glass melt. The parameters of crystal nucleation have
been determined. The absolute values of the stationary nucleation
rates 
of lithium disilicate crystals in the
(where x = 23.4, 26.0, and
glasses with the compositions lying in the
metastable phase separation region have been compared with the
corresponding rates for the (where x = 32.5, 32.97, 33.5, 33.85,
34.72, 36.2, 37.0, 37.98, 39.0, 41.15, 44.11, and 
The character of crystallization in glasses with the compositions
lying in the phase separation region of the system is compared with that in the glass
of the stoichiometric lithium disilicate composition. The inference
has been made that the phase separation weakly affects the nucleation
parameters of the lithium disilicate.
Li2O-SiO2 system, the glasses of (where x = 23.4, 26.0, 29.1, 32.5,
32.97, 33.5, 33.85, 34.72, 36.2, 37.0, 37.98, 39.0, 41.15, and
compositions, lithium disilicate crystal,
lithium metasilicate crystal, crystal nucleation, stationary
nucleation in phase separated and no phase separated glasses.
