氟羟基磷灰石的结构及热稳定性研究

Study on the Structure and Thermal Stability of Hydroxyfluorapatite

采用湿化学法制备了氟羟基磷灰石(FHA),研究了氟掺杂对晶体结构和热稳定性的影响,探讨了氧化铝基体上磷灰石涂层的组成与热稳定性的关系。用X射线衍射表征了物相组成和晶格参数的变化,用红外光谱分析了晶体结构。结果表明:氟的替代引起了晶格参数和键能的变化,阐述了氧化铝-磷灰石系统中,羟基磷灰石与氟羟基磷灰石的分解机制。

Hydroxyfluorapatite （FHA） was prepared by the wet chemical method. The effect of fluorine substitution on the structure and thermal stability was studied. The relation between composites and thermal stability of apatite coating in the presence of alumina oxide substrate was investigated. The phase composition and the change of crystal lattice parameters were characterized by X-ray diffraction and Fourier transform infrared spectroscopy, respectively. The results show that crystal lattice parameters and bond energy make c FHA in the alumina hanges by incorporation of F in the structure. Decomposition mechanism of HA and oxide-hydroxyapaptite system is formulated.