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

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  • University of Science and Technology Beijing


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.


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


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