【摘要】 羟基磷灰石(HA)晶须具有较低的位错密度,较高的抗拉性能,可用作生物陶瓷的增韧材料。以四水硝酸钙和磷酸氢二铵为原料,在水热条件下,通过控制反应温度及时间,制备了羟基磷灰石晶须。借助X射线衍射仪(XRD)、透射电子显微镜(TEM)及傅里叶变换红外光谱仪(FT-IR),对羟基磷灰石的晶相组成、形貌、大小及化学组成进行了表征。研究结果表明:当前驱物钙磷物质的量比为1.67时,以尿素和山梨醇为辅助试剂,在水热条件下,可制得结晶度高、形貌均一、长径比相对较大的羟基磷灰石晶须。更多还原

【Abstract】 Hydroxyapatite(HA) whisker,with lower dislocation density and higher tensile strength,can be used as toughening material in bioceramic.HA whisker has been synthesized under hydrothermal condition by controling reaction temperature and time,using Ca(NO3)2 ·4H2O and(NH4)2HPO4 as raw materials.The phases,morphology,size,and chemical composition of obtained products were characterized by X-ray diffraction(XRD),transmission electron microscope(TEM),and fourier transform infrared ray(FT-IR),respectively.The results showed that hydroxyapatite whiskers with high degree of crystallinity,uniform morphology,and with high slenderness ratio can be successfully synthesized by hydrothermal treatment with urea and sorbitol as addition agents,when n(Ca)/n(P) of precursors is 1.67.更多还原