Crystal Growth In Glasses Research Articles

Bubble‐Induced Nucleation and Crystal Growth in Glass

Evidence that bubbles can cause annular nucleation and subsequent crystal growth on the surface of Bao‐Al2O3‐TiO2‐SiO2, glasses is presented. The crystalline rings were identified as hexacelsian, BaAl2Si2O8 (the hexagonal or high‐temperature polymorph of celsian). Size, character, and suggestions as to the genesis of these rings are given.

Growth of crystals in glass

The devitrification characteristics of five Na2O-SiO2 glasses have been examined by a new method, and some empirical relationships, applicable over the range of compositions studied, have been established. Comparisons are made with results given in other published work.

An improved apparatus for the determination of liquidus temperatures and rates of crystal growth in glasses

An improved apparatus for the determination of liquidus temperatures and rates of crystal growth in glasses

Rate of Crystal Growth in Glass

THE shape of the curve relating the rate of crystal growth to temperature of undercooling is familiar as a hump-backed curve. The shape of the low-temperature portion is usually ascribed to viscosity, and that at higher temperatures either to surface tension barriers hindering nucleus formation, or to a rather arbitrary undercooling factor based on the geometry of the phase diagram1. The former is inadmissible where the growth of crystals already in existence is being considered, and the latter gives a very poor agreement with the experimental data, due, no doubt, to the arbitrary nature of the assumptions involved.