浓度、温度和陈化对羟基磷灰石合成的影响

Effect of Concentration and Ageing on the Synthesis of Hydroxyapatite Powder

用四水硝酸钙和五氧化二磷的乙醇溶液为前驱体制备羟基磷灰石粉体,通过XRD、FTIR方法研究了温度、浓度、陈化对羟基磷灰石粉体合成的影响。结果表明,随着浓度增加,羟基磷灰石粉体合成加快;温度对羟基磷灰石粉体合成影响显著,500℃左右是合成羟基磷灰石粉体较合适的温度;陈化则提高羟基磷灰石的纯度,增加其热稳定性,未陈化处理容易出现CaO相。

Hydroxyapatite (HA) powder was prepared by solgel method with Ca(NO3)2·4H2O and P2O5 ethanol solution. This process without refluxing was simple and the reactants were cheap compared with other solgel methods. The phase structures were studied by XRD and FTIR. The results showed that 500℃ seemed to be the appropriate temperature to prepare the fine HA powder. The ageing of the sol influenced the purity greatly. The CaO phase was observed in the powder without ageing. The ageing can increase the stabilization of HA. This process was simple and appropriate to produce nanosized HA powders in large quantities. 