放电等离子烧结制备纳米羟基磷灰石-氧化锆复合陶瓷

目的制备保持羟基磷灰石生物活性的新型纳米羟基磷灰石-氧化锆复合陶瓷。方法湿球磨法制备羟基磷灰石与氧化锆复合粉体,复合陶瓷素坯制作后,放电等离子烧结制备新型纳米羟基磷灰石-氧化锆复合陶瓷,X射线衍射分析及扫描电子显微镜观察复合陶瓷的晶相与超微结构。结果复合陶瓷经X射线衍射分析显示其中有羟基磷灰石相和四方相氧化锆,未发现其他物质以及其他相的氧化锆。扫描电镜下氧化锆相呈白色,羟基磷灰石相呈黑色;黑白区域间隔存在,呈现均匀散在分布,白色区域略多于黑色区域,未见明显孔隙存在。结论用放电等离子法制备得到的复合陶瓷均匀、致密,无明显气孔存在,无羟基磷灰石或氧化锆单一组分的团聚,提示两组分在烧结过程中未发生反应。

Nano-Hydroxyapatite-Zirconia Ceramics Sintered by Spark Plasma Sintering

Objective To obtain nano-hydroxyapatite(HAp)-zirconia(ZrO_(2)) ceramics with bioactive HAp.(Methods)HAp and ZrO_(2) powder were mixed and ball-milled in ethyl alcohol with ZrO_(2) balls as media.Nano-HAp-ZrO_(2) ceramics were obtained with a novel consolidation technique,spark plasma sintering(SPS).After sintering the scanning electron microscope and X-ray diffraction inspection were employed on nano-HAp-ZrO_(2)cer-(amics.) Results(The HAp-ZrO_(2))ceramics did not contain any phases other than HAp and the tetragonal modification of ZrO_(2).They were white in ZrO_2 phase and black in HAp phase under the scanning electron microscope,and were fully densified thus free of pores. Conclusion There are no reactions between HAp and ZrO_2 during the sintering procedure.The HAp-ZrO_(2) ceramics sintered by SPS are quite different from the traditional ceramics.