优化了纯钛微弧氧化膜的制备工艺.将用优化后工艺制备的微弧氧化膜进行碱化处理,然后置于模拟体液(SBF)中培养,以观察其生物活性的优劣.采用正交设计法优化了实验方案,用综合评分法分析了氧化膜的孔隙率、孔密度和孔直径,确定最佳工艺条件为:正向电压400 v,占空比60％,频率550 Hz,氧化时间25 min.对在最佳工艺条件下制备的膜层进行了XRD、SEM和EDS测试,结果表明:优化工艺后生长的膜层由锐钛矿型的TiO2组成,陶瓷层表面分布大量微孔,孔隙率为0.70×108,孔密度为12％,孔径约为3μm.经碱化处理的膜层置于模拟体液中培养14d后,膜层表面被生长出的类骨磷灰石完全覆盖,证明其具有良好的生物活性,且生长出的缺钙型磷灰石与人体自然骨成分相似.但是,随着培养时间的延长磷灰石层发生溶解.
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