摘要
目的 :初步了解制备纯钛表面阳极氧化膜和沉积HA薄涂层的技术路线。方法 :商业纯钛片经抛光、除油、酸洗后 ,置于电解槽中进行阳极氧化 ,采用 β-磷酸甘油钠和醋酸钙作为电解质 ,阳极化条件为直流电压200V～400V ,电流密度≤50mA/cm2,时间15分钟 ,阳极氧化完毕后将钛片经高温水热处理2小时 (280℃～300℃ )。结果 :在阳极化后的钛片表面出现蜂窝状孔隙 ,孔径约1μm -3μm ,周围为较规则的突起 ;X射线衍射图谱 (XRD)显示钛表面有金红石和锐钛矿两种氧化钛形成 ,能谱分析 (EDAX)表明钛表面氧化膜内含Ca、P元素 ;水热处理后 ,在钛表面出现了结晶物 ,XRD证明其为HA。结论 :阳极氧化可以在纯钛表面形成呈蜂窝状孔隙的、含Ca、P的氧化膜 ,经水热处理后 ,在氧化膜表面沉积了HA薄涂层。
Objective:To learn titanium anodic oxidation method and HA crystals precipitation technique. Methods:After polished, cleaned (got rid of oil) and acid bathed, commercial pure titanium plates were anodized at 200V～400V with direct electric current density less than 50mA/cm2 for 15 minutes in the electrolytic trough. 0.03M～0.04M β-glycerophosphate sodium and 0.2M～0.3M calcium acetate were used as electrolyte. Then, titanium plates were hydrothermal treated in the autoclave for 2 hours at 280℃～300℃. Results:Titanium plates present rough and porous surface. With SEM, many small holes could be seen on the titanium plates'surface with the diameter of micropores was from 1μm to 3μm and the height of microprojections was from 5μm to 7μm. XRD detected anatase and rutile titania on the titanium surface, and EDAX results showed the existence of Ca and P. After hydrothermal treatment, there had some crystals precipitated on the surface, which were proved to be HA by XRD. Conclusion:Anodic oxidation could form a rough and porus oxide films containing Ca and P on the pure titanium surface and after hydrothermal treatment, a thin HA layer could be precipitated on the anodic films.
出处
《中国口腔种植学杂志》
2001年第2期51-54,共4页
Chinese Journal of Oral Implantology
