纳米类骨磷灰石晶体合成

Study on bone-like nano-apatite crystals

采用硝酸钙和磷酸钠水溶液以不同滴定顺序,于70℃下合成了纳米羟基磷灰石(n-HA)沉积物。结果表明,不同的滴定顺序得到的产物都是n-HA晶体,合成的n-HA具有与骨磷灰石晶体十分类似的组成成分、尺寸、结晶度和形貌,因此,合成的n-HA可称为类骨磷灰石晶体。考察了不同滴定顺序对n-HA形貌、结晶度和尺寸的影响;发现相同温度下,磷酸钠滴定硝酸钙得到的磷灰石呈现相对规整的针状晶体,结晶度高,杂质离子少。

In this study, nano-hydroxyapatite （n-HA） was prepared by using calcium nitrate and sodium phos-phate aqueous solution as the reagents, ＇and the properties were also characterized. The results indicate that the prepared n-HA crystals have a similar composition, size, morphology and crystallinity to those of bone apatite crystals. Therefore, this n-HA crystals can be called bone-like apatite crystals. Additionally, it is also proved that different titration orders have an obvious effect on the morphology, crystallinity and size of the resultant crystals. Moreover, at the same temperature, when the calcium nitrate was dropped into sodium phosphate solution, the obtained n-HA crystals showed relatively regular needle-like shape, high crystallinity and low content of carbonated ions.