摘要
目的探讨煅烧温度对羟基磷灰石结晶性能、晶粒尺寸、形貌的影响。方法以四水硝酸钙和五氧化二磷为原料,无水乙醇为溶剂,采用溶胶一凝胶法制备出羟基磷灰石(HAP)纳米粉体。利用X射线衍射分析(XRD)和红外光谱(FFIR)研究煅烧温度对羟基磷灰石结晶性能、晶粒尺寸、形貌的影响。采用扫描电镜(SEM)观察制备粉体的表面形貌和尺寸。结果500℃可初步形成结晶度不太高的HAP;650℃则晶化程度提高;到800℃时晶化程度更高。凝胶HAP经500℃煅烧后,颗粒以团聚为主,边界不清;650℃时结晶粒度大小为48nm,800℃时为78nm。结论采用溶胶凝胶法,650℃处理可得到结晶性能良好、分散均匀、50nm左右大小的羟基磷灰石粉体。煅烧温度对羟基磷灰石粉体的制备有重要影响,温度过低,晶化程度差,晶粒尺度小,提高煅烧温度有利于HAP晶化程度的提高。
Objective To evaluate the influence of calcining temperature on the crystallinity and morphology of hydroxyapatite powders. Methods Hydroxyapatite nanopowders were prepared by using a selgel process with phosphoric pentoxide(P2O5) and calcium nitrate tetrahydrate[ Ca( NO3 )2· 4H2O]. The influence of calcining temperature on the crystallinity and morphology of hydroxyapatite powders was studied by X-ray diffraction( XRD), fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). Results When the temperature was 650 ℃, HAP was the purest and the geanule size was 48 nm. While the temperature was 800 ℃, powder was the best and the geanule size was 78 nm. Conclusions Nano-hydroxyapatite powder prepared from Ca (NO3 )2 · 4H2O and P2O5 with good crystallinity and the particles of hydroxyapatite powder are sphericity with diameter less than 50 nm when they are sintered at the temperature of 650 ℃.
出处
《现代临床医学生物工程学杂志》
2007年第1期37-40,共4页
Journal of Modern Clinical Medical Bioengineering
基金
广州市科技局资助项目(200723-E0191)
广州市教育局资助项目(61105)
关键词
纳米材料
羟基磷灰石
煅烧温度
晶化程度
Nanomaterial
Hydroxyapatite
Calcined temperature
Degree of crystallization