pH值对水热合成HA晶须形貌的影响  

Influence of pH value on the morphology of hydrothermal synthetical HA whiskers

作　　者：高家诚[1] 陈飞宏[1] 张敏[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400030

出　　处：《功能材料》2010年第8期1447-1449,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(30670562)

摘　　要：研究了不同pH值条件下水热法制备羟基磷灰石晶须的形貌特征。采用X射线衍射仪(XRD),场发射扫描电子显微镜(FESEM)等分析了pH值对HA晶须组成、形貌和结构的影响。结果表明,在水热条件下,可以成功地合成结晶度高、组成均一的羟基磷灰石晶须。随着pH值的提高,a轴方向尺寸上升,c轴方向基本不变,长径比减小。在微观形貌上羟基磷灰石逐渐由针状向球状形态转变。在pH值=7～8之间,合成的羟基磷灰石晶粒尺寸变化不大,稳定性较高,适合工业化生产。还初步讨论了HA的生长机制。The objective of this work is the research on the crystal structure of hydroxyapatite（HA） whisker synthesized by hydrothermol method at variable pH conditions. The composition,morphology and structure of hydroxyapatite whisker were characterized by X-ray diffraction（XRD）,and field emission scanning electron microscopy （FESEM）.The results show that under hydrothermal conditions,hydroxyapatite with uniform morphology and high crystallinity was obtained. With the increase of pH value,grain size of the a-axis direction increases while that of the c-axis direction size basically unchanges,which results in the decrease in the aspect ratio. Also,the morphology of HA gradually changed from needle-like to short rod-like,until ball-like. Within the pH range of 7-8,hydroxyapatite with narrow size scope has been achieved suitable for industrial production. And the growth mechanism of HA was primarily discussed.

关 键 词：PH值 水热 羟基磷灰石 形貌 生长机制 

分 类 号：R318.08[医药卫生—生物医学工程]