Internal Stress in Crystallised Glasses in the System MgO-Al2O3-SiO2-TiO2
- 1 January 1963
- journal article
- research article
- Published by Taylor & Francis in Transactions of the Indian Ceramic Society
- Vol. 22 (1) , 30-36
- https://doi.org/10.1080/0371750x.1963.10855442
Abstract
The glass composition, MgO 11.5%, Al2O3 21.4%, SiO2 60.5% and TiO2 6.4% (by weight), was crystallised, at different temperatures ranging from 825 to 1225° under controlled conditions. The crystal phases were detected by X-ray method and the modulus of rupture, thermal expansion and density of the crystallised samples were measured. All the three properties increased to a maximum with increasing crystallisation temperature. Higher density and thermal expansion of the crystal phases have been shown to produce compressive stress on glass and, as a result, the strength increases to a maximum of 5,500 kg/cm2, compared to 1,700 kg/cm2 for uncrystallised glass. The relations between stress, thermal expansion and density have been discussed quantitatively.Keywords
This publication has 2 references indexed in Scilit:
- Studies on the Devitrification of the Glasses of the System Li2O-ZnO-Al2O3-SiO2Journal of the Ceramic Association, Japan, 1961
- Studies on the Devitroceram of the System, CaO⋅TiO2⋅SiO2-Li2O⋅Al2O3⋅4SiO2-Li2O⋅2SiO2Journal of the Ceramic Association, Japan, 1960