High temperature characteristics of synthetic hydroxyapatite
High temperature characteristics of synthetic hydroxyapatite
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DOI：
10.1007/bf00122983
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
Ji-ming Zhou;Xing‐dong Zhang;Ji-yong Chen;Shao-Hang Zeng;K. Groot
中科院分区：
文献类型：
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作者：
Ji-ming Zhou;Xing‐dong Zhang;Ji-yong Chen;Shao-Hang Zeng;K. Groot
采用X射线衍射、红外热分析、差热分析、热重分析等方法研究了高温烧结合成羟基磷灰石的特性。结果表明，当在低于1200°C的干燥或潮湿空气中烧结时，Ca/P比接近1.67的合成HAp是稳定的。即使经过很长时间，也无法观察到磷酸三钙（TCP）。超过1200°C，HAp逐渐失去其OH基团并转化为氧磷灰石[Ca 10 O（PO 4）6或Ca（PO 4）6 O.□]。在1450°C下，氧磷灰石分解成产物α-Ca 3（PO 4）2、Ca 2 P2 O 7和Ca 4P 2 O 9。
The characteristics of synthetic hydroxyapatite sintered at high temperature were studied by means of X-ray diffraction, infrared and differential thermal analysis, and thermogravimetric analysis. The results show that synthetic HAp with a Ca/P ratio near 1.67 is stable when sintered in dry or wet air below 1200°C. Even after long times, no tricalcium phosphate (TCP) can be observed. Beyond 1200°C, HAp loses its OH groups gradually and is transformed to oxyapatite [Ca10O(PO4)6or Ca(PO4)6O.□]. At 1450°C oxyapatite dissociates into the products α-Ca3(PO4)2, Ca2P2O7and Ca4P2O9.