为了研究烧结时间对羟基磷灰石靶的影响,将纯度为99%的羟基磷灰石粉末压制成 圆盘形靶,并在氩气中保持800°C恒温分别烧结12、16、20、24 h。用X射线衍射仪(XRD)和X射线 光电子能谱仪(XPS)检测不同烧结时间的羟基磷灰石靶。结果表明:烧结时间对羟基磷灰石靶的 结晶度和组成元素种类没有明显影响,但对钙磷比值有显著影响。烧结时间从12 h增加 到20 h, Ca/P比值增大;从20 h增加到24 h, Ca/P比值反而减小。20 h、800°C高温烧结的 羟基磷灰石靶具有更好的生物相容性和稳定性。

In order to investigate influence of sintering time on hydroxyapatite target, the hydroxyapatite powder with 99% purity is pressed into disc-shaped targets, and the targets are sintered for 12, 16, 20 and 24 h at 800°C in a argon ambience, respectively. Hydroxyapatite targets with different sintering time are detected with X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). Results show that sintering time has no obvious influence on the crystallinity and composition of hydroxyapatite targets, but it has significant influence on the ratio of Ca to P. The ratio of Ca to P increases when the sintering time increases from 12 h to 20 h, but the ratio decreases when the sintering time increases from 20 h to 24 h. The hydroxyapatite target sintered for 20 h at 800°C has better biocompatibility and stability.