采用微弧氧化-碱热处理复合的方法，在纯钛表面制备出较大表面积且成分单一的 TiO2陶瓷膜，并在模拟体液中对膜层的生物活性予以评价。结果表明，纯钛微弧氧化膜层主要由锐钛矿型的 TiO2构成，其表面孔径均匀，孔隙率达到12％；经碱热处理后，与模拟体液和去离子水的润湿角实验证明膜层具有较好的亲水性；碱热处理后的膜层置于模拟体液中培养14 d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。
The TiO2 ceramic coating with single component and larger surface area was prepared on pure titanium substrate by a novel process involving treatment of the MAO (micro-arc oxidation)and alkali-heat treatment, and then trained the coating in SBF(simulated body fluid)for the its bioactivity evaluation.The results showed that:the ceramic coating was mainly composed of anatase TiO2 ,and the porosity of the coating which with uni-form porous structure reached 1 2%;as a result of the wetting angle with SBF and deionized water,the coating treated by alkali-heat method showed good hydrophilic;The coating treated by alkali-heat method was com-pletely covered by bone-like apatite when it was cultured in SBF for 14 d,and the calcium deficiency apatite grew on the coating which with perfect bioactivity was similar to the human bone in composition.
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