Crystallization of Baria-Titania-Silica Glasses
The critical cooling rate for glass formation, Rc, and the crystallization kinetics of the compositions 1 2(100 - x)BaO- 1 2(100 - x)TiO2-xSiO2 with x = 20, 25, 30, 33.3 and 40 mol.% were studied using a thermal image furnace. Crystallization was studied under nonisothermal conditions and the data were analyzed using the Johnson-Mehl-Avrami (JMA) equation. The Rc and activation energy for crystallization both decrease with increasing silica content. Fresnoite, Ba2TiSi2O8, crystallized from all of the glasses when they were reheated. The infrared absorption spectra of the glasses and crystals show that they both contain (Si2O7) and square pyramidal (TiO5) groups.
C. S. Ray and D. E. Day, "Crystallization of Baria-Titania-Silica Glasses," Journal of Non-Crystalline Solids, vol. 81, no. 1-2, pp. 173-183, Elsevier, Apr 1986.
The definitive version is available at http://dx.doi.org/10.1016/0022-3093(86)90268-1
Materials Science and Engineering
Keywords and Phrases
Oxides - Amorphous; Baria-titania-silica Glasses; Johnson-mehl-avrami Equation; Glass, Metallic
International Standard Serial Number (ISSN)
Article - Journal
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