The effect of boron substitution for aluminium on the microstructure of calcium fluoro-aluminosilicate glasses and glass ceramics

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • University of Science and Technology Beijing

Abstract

Calcium fluoro-aluminosilicate (4.5SiO2-3Al2O3-1.5P2O5-3CaO-2CaF2) glasses have significant applications in the medical and dental fields. However, due to the biological hazard of aluminium in the human body, this study focused on the influence of boron substitution for aluminium on the structure and properties of a series of substituted glasses and their correlated glass-ceramics. The results indicated that by increasing the amount of boron, the density of glasses and their glass-ceramics both decreased, whereas the number of bridging oxygens in the glasses increased. The glass transition temperature and the crystallization temperature remained almost unchanged for the glasses with a boron substitution of less than 25 mol%. Boron formed oxygen bridges in all glasses in the form of BO3 triangles and BO4 tetrahedra. Reducing the Al content in glasses, had an effect on the morphology and orientation of the fluorapatite crystal phase formed.

Details

Original languageEnglish
Number of pages7
JournalJournal of the European Ceramic Society
Early online date14 Nov 2018
Publication statusE-pub ahead of print - 14 Nov 2018

Keywords

  • Boron-Substitution, Calcium fluoro-aluminosilicate glasses, Fluorapatite, Mullite