本文以Ca(NO3)2·4H2O和(NH4)2HPO4为原料水热条件下合成了羟基磷灰石晶体.研究了水热温度,保温时间,pH值,溶液浓度对合成羟基磷灰石晶体的影响,并借助X射线衍射(XRD)、红外吸收光谱(FT-IR)、扫描电子显微镜( SEM)对合成的羟基磷灰石进行了物相组成、化学组成、微观形貌的研究.结果显示,pH值对合成羟基磷灰石形貌有决定性的影响,调节pH值为5、7、8、9、10,羟基磷灰石形貌经历了长棒状、短棒状、球状的变化.确定pH值为10,正交试验研究其它三个因素对球状羟基磷灰石粒径的影响,三因素影响顺序依次为:初始溶液浓度＞保温对间＞水热温度.正交试验同时得到合成粒径小活性高的HA晶体的最佳工艺条件组合为:k2k1k3,即水热温度为140℃,保温时间为1d,初始溶液浓度为0.5 mol/L.
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