Predicting physical and chemical properties of bioactive glasses from chemical composition. Part 2: Devitrification characteristics

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Arstila H, Vedel E, Hupa L, Hupa M
Publisher: SOC GLASS TECHNOLOGY
Publication year: 2008
Journal: European Journal of Glass Science and Technology Part a Glass Technology
Journal acronym: GLASS TECHNOL-PART A
Volume number: 49
Issue number: 6
Start page: 260
End page: 265
Number of pages: 6
ISSN: 1753-3546


Abstract

The tendency to devitrification was studied for 30 glass compositions in the range of interest for bioactivity (Na(2)O-K(2)O-MgO-CaO-B(2)O(3)-P(2)O(5)-SiO(2)). The glass transition and devitrification temperatures were determined by differential thermal analysis and hot stage microscopy. The crystal phases that formed were analysed by powder x-ray diffraction and SEM/EDXA. Depending on their alkaline oxide contents, the glasses tended to devitrify into wollastonite or sodium calcium silicate type crystals. The higher the alkaline oxide content, the lower was the devitrification temperature. Mathematical models describing the dependence of glass transition and devitrification temperatures on oxide composition were derived and successfully tested on four reference glass compositions. The models can be used to choose glass compositions with working properties suitable for specific high temperature processes.

Last updated on 2019-13-11 at 03:20