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研究发现牡蛎白垩层是一种天然方解石质多孔微结构材料,并以其为原料,采用水热法在90℃水浴、常压条件下与磷酸氢二铵溶液反应生成羟基磷灰石.产物通过傅立叶红外光谱(FTIR)、X射线粉末衍射(XRD)、扫描电子显微镜(SEM)进行分析.结果表明,常压下反应15min就出现了羟基磷灰石.48h后白垩层几乎完全转化为羟基磷灰石,并且生成的羟基磷灰石仍完好的保留原多孔微结构.这种转化是通过两种历程完成的,即方解石表面的溶解-重结晶及其内部的固态局域规整离子交换反应.

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