材料期刊网

通过调整反应溶液中Zn/Sr摩尔比和水热反应时间,制备了锌锶替代羟基磷灰石(Zn-Sr-HA)微球.利用光学显微镜、X射线荧光光谱(XRF)、X射线衍射仪(XRD)和场发射扫描电子显微镜(SEM)研究了微球的组成、结构和形貌特征.结果表明,当初始溶液中Zn/Sr摩尔比为3:2或1:1、反应温度180℃、反应时间3～4h时,产物全部由HA微球组成.微球的平均直径约10～20 μm,大小均匀、分散性好.随着初始溶液中Zn/Sr摩尔比的增加,HA微球中Zn/Sr摩尔比逐渐增加,晶胞参数a值和c值逐渐减小.

Changing Zn/Sr molar ratio and hydrothermal reaction time of the reaction solution,the strontium and zinc substituted hydroxyapatite (Zn-Sr-HA) microspheres were successfully prepared via hydrothermal method.The structure,composition and morphology of microspheres were studied by optical microscopy,X-ray fluorescence spectrometry (XRF),X-ray diffraction (XRD) and field emission scanning electron microscope (SEM).The results show that the products are all composed of HA microspheres when the Zn/Sr molar ratio is 3:2 or 1:1 in the initial solution at reaction temperature 180℃ for 3 h to 4 h.The average diameter of microspheres is about 10 μm to 20 μm,with uniform size and good dispersion.With the increase of the molar ratio of Zn/Sr in the initial solution,the Zn/Sr molar ratio of HA microspheres increase gradually,and the cell parameters a and c values decrease gradually.