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The effect of boron substitution for aluminium on the microstructure of calcium fluoro-aluminosilicate glasses and glass-ceramics
Journal of the European Ceramic Society ( IF 5.8 ) Pub Date : 2018-11-14 , DOI: 10.1016/j.jeurceramsoc.2018.11.023
Siqi Zhang , Artemis Stamboulis , Wen Ni

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.



中文翻译:

硼替代铝对氟铝硅酸钙玻璃和玻璃陶瓷微观结构的影响

氟铝硅酸钙(4.5SiO 2 -3Al 2 O 3 -1.5P 2 O 5 -3CaO-2CaF 2)眼镜在医疗和牙科领域具有重要的应用。然而,由于铝对人体的生物危害,本研究集中于硼替代铝对一系列取代玻璃及其相关玻璃陶瓷的结构和性能的影响。结果表明,通过增加硼的含量,玻璃及其玻璃-陶瓷的密度均降低,而玻璃中的桥连氧数量增加。对于硼取代度小于25摩尔%的玻璃,玻璃化转变温度和结晶温度几乎保持不变。硼以BO 3三角形和BO 4的形式在所有玻璃中形成氧桥四面体。降低玻璃中的Al含量对所形成的氟磷灰石晶体相的形态和取向有影响。

更新日期:2018-11-14
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