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.
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