论文部分内容阅读
采用CaCO3 和CaHPO4·2H2 O的混合物为前驱物 ,在蒸压釜内经不同温度和时间的水热处理获得了晶粒完整、粒度在 10 0nm以下的HA粉体。借助X射线衍射 (XRD)、扫描电镜(SEM )及红外光谱 (FTIR)对HA的晶相组成、粒度、形貌及化学组成进行分析。研究结果表明 :随水热温度的提高及时间的延长 ,晶体发育越完整 ,粒度越大 ;当温度为 2 0 0℃ ,反应时间为8h时 ,HA为端面尺寸约 60nm的柱状或针状晶体 ,有少量CO3 2 -进入磷灰石结构。这种纳米羟基磷灰石晶体在形态、结构和组成上与人骨相似 ,更有利于作为生物医用材料应用
The mixture of CaCO3 and CaHPO4.2H2O was used as precursor to obtain the HA powder with the complete grain size and particle size below 100 nm by hydrothermal treatment at different temperature and time in the autoclave. The crystal phase, particle size, morphology and chemical composition of HA were analyzed by XRD, SEM and FTIR. The results show that with the increase of hydrothermal temperature and the extension of time, the crystal growth is more complete and the particle size is larger. When the temperature is 200 ℃ and the reaction time is 8h, the HA is a columnar or needle-like crystal with a size of about 60nm , A small amount of CO 3 2 - into the apatite structure. This nano-hydroxyapatite crystal is similar in shape, structure and composition to human bone and is more conducive to application as a bio-medical material