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Title:: Influence of F Adopting on the Structure and Properties of ?Alumina/hydroxyapatite Composites

作者:: 窦金河1; 张木蕃2; 张聪毅1; 张希华1△; 1.山东大学材料科学与工程学院, 济南 250061；2.北京大学第一医院，北京100034

Author(s):: DOU Jinhe1; ZHANG Mufan2; ZHANG Congyi1; ZHANG Xihua1; 1.School of Materials Science and Engineering, Shandong University, Jinan 250061, China；2.Peking University First Hospital，Beijing 100034，China

Keywords:: F Adopting; Hydroxyapatite; Ceramics; Sintering; Mechanical properties

摘要:: 本研究采用化学沉淀法制备了纳米Al2O3/HA复合粉体，采用热压烧结法制备了Al2O3/HA复合生物陶瓷，并研究了F掺杂量对复合陶瓷物相组成和力学性能的影响。结果证明复合陶瓷的力学性能随着F掺杂量的提高而逐渐增大，当F掺杂量x=1时，复合陶瓷的力学性能最佳，其弯曲强度和断裂韧性分别为147.2 MPa和2.19 MPa·m1/2。当F掺杂量高于0.5时，可以抑制复合陶瓷中HA的分解，并且在烧结过程中有AlF3相生成，可促进复合陶瓷的致密化。F掺杂可以提高复合陶瓷的生物活性，但是F掺杂量对复合陶瓷的生物活性影响不大。

Abstract:: Nano-Al2O3/HA composite powders were synthesized by chemical precipitation method, and the nano-Al2O3/HA composites were prepared by hot pressed sintering. The influence of F adopting on the structure and properties of nano-Al2O3/HA composites were studied. The research showed that mechanical properties of the Al2O3/HA composites could be improved by F doping, The bending strength and fracture toughness were 147.2 MPa and 2.19 MPa·m-0.5 when the F content was 1 and the decomposition of HA could be inhibited with F addition. What’s more, the obtained AlF3 phase could promote the densification process of composite ceramics. F doping can improve the bioactivity of the composite ceramics, but the F content has little effect on the bioactivity of the composite ceramics.