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Abstract
The calcium fluoro-aluminosilicate (4.5SiO2-3Al2O3-1.5P2O5-3CaO-2CaF2) glasses have significant applications in medical and dental fields. However, due to the biological hazard of aluminium element in human body, this study focus on the influence structure and properties of a series of resultant glasses and their correlated glass-ceramics after boron substitution for aluminum at different amounts. The results indicates that by increasing addition amount of boron, the density of the glasses and its glass-ceramics both decrease with the increase amount of bridging oxygens. And the glass transition temperature (Tg) and crystallization temperature (Tp) almost unchange for glasses but for the glass-ceramics, a decrease of both Tg and Tp are observed. Boron atoms only bridges with oxygen in glasses and its glass-ceramics as the form of BO3 and BO4 groups. By reduction of Al in glass, some non-Al containing needle-like calcium phosphate become the main crystalized phase.
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