【作者】 王志强； 薛冬峰； 吕秉玲； Henryk Ratajczak；

【Author】 WANG Zhi-qiang, XUE Dong-feng, LV Bing-ling, Henryk Ratajczak ( Stale Key Laboratory of Fine Chemicals, Department of Materials Science and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China; Department of Material Science and Engineering, Dalian Institute of Light Industry, Dalian 116034, China: Faculty of Chemistry, University of Wroclaw, ul. F. Joliot-Curie 14, 50-383 Wroclaw, Poland.)

【机构】 大连理工大学精细化工国家重点实验室化工学院； Faculty of Chemistry,University of Wroclaw,ul．FJoliot-Curie 14,50-383 Wroclaw．Poland；

【摘要】 本文采用多层淤浆浸滞和烧结工艺,在α-Al2O3陶瓷衬底上制备了羟基磷灰石基涂层, 其中,涂层材料是以玻璃片为基底的,基片的化学成分是Na2O 8．0,K2O 7．0,Al2O3 3．0,ZnO 1．5, B2O3 15．0,SiO2 65．5(质量百分比)。最后制备的涂层材料的组分是均匀变化的,从界面(涂层和衬底之间)到表面,羟基磷灰石含量逐渐增加而玻璃基片逐渐减少。采用本文设计的工艺流程, 可以有效地改善涂层材料的微观结构和机械性能,同时,所获得的涂层组分拥有较高的羟基磷灰石梯度浓度和较大的比表面积,从而使涂层材料有良好的生物适应性和生物活性(即良好的生物降解性能)。更多还原

【Abstract】 A hydroxyapatite-based gradient coating on α-Al2O3 ceramic substrate is prepared by a multi-layer slurry-dipping and sintering process, on the basis of the glass binder with the chemical composition Na2O 8.0, K2O 7.0, Al2O3 3.0, ZnO 1.5, B2O3 15.0, SiO2 65.5 (wt%). The coating component varies gradually, in which hydroxyapatite increases and glass decreases gradually from the interface (between the coating and alumina substrate) to surface layer. The microstructure and mechanical properties of the coating layer can be effectively improved by the present design. The obtained gradient composite possesses a high hydroxyapatite concentration and porous surface, which thus leads to a good biocompatibility and bioactivity (e.g., the good biodegradation).更多还原