Griffin S G, Hill R G
Department of Materials Science and Technology, University of Limerick, Plassey Park, Ireland.
Biomaterials. 2000 Apr;21(7):693-8. doi: 10.1016/s0142-9612(99)00216-1.
The influence of fluorine content of the glass in a series of glasses based on: 4.5SiO2-3.0Al2O3-1.5P2O5-(5.0-X)CaO-XCaF2 was investigated on their cement formation with poly(acrylic acid). Increasing the fluorine content of the glass was found to reduce the glass transition temperature, as a result of fluorine replacing bridging oxygens by non-bridging fluorines. Working and setting times of the cement pastes reduced with increasing fluorine content of the glass. Compressive strength and Young's moduli increased with fluorine content initially and then remained approximately constant. Fracture toughness, toughness and un-notched fracture strength were not significantly influenced by fluorine content. The results are consistent with fluorine simultaneously disrupting the glass network and reducing the basicity of the glass.
研究了基于4.5SiO₂-3.0Al₂O₃-1.5P₂O₅-(5.0-X)CaO-XCaF₂的一系列玻璃中玻璃氟含量对其与聚丙烯酸形成水泥的影响。发现随着玻璃中氟含量的增加，玻璃转变温度降低，这是由于氟用非桥连氟取代了桥连氧。随着玻璃中氟含量的增加，水泥浆体的工作时间和凝结时间缩短。抗压强度和杨氏模量最初随氟含量增加，然后大致保持不变。断裂韧性、韧性和无缺口断裂强度不受氟含量的显著影响。结果与氟同时破坏玻璃网络并降低玻璃碱度一致。
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