粉体形态对网化HA陶瓷支架烧结和力学性能的影响:球形和针状HA粉体对比研究  

The Impact of Powder Shape on Sintering and Mechanical Properties of Net HA Ceramic Scaffold:Comparison between the Spherical and Acicular HA Powders

作　　者：肖素光[1] 赵婧[2] 翁杰[2] 

机构地区：[1]四川师范大学草堂校区,四川成都610072 [2]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《四川师范大学学报（自然科学版）》2008年第5期619-622,共4页Journal of Sichuan Normal University（Natural Science）

基　　金：教育部高等学校科技创新工程重大项目培育基金(704039)资助项目

摘　　要：以球形和针状的羟基磷灰石(HA)粉体作基料,采用有机泡沫浸渍法制备出高孔隙率的三维网状HA生物陶瓷支架,并研究粉体形态的不同对网化HA支架力学性能的影响,从而优化制备工艺以改善网化HA支架的力学性能,提高抗压强度.运用SEM、XRD、FTIR以及抗压测试考察了不同粉体对网状HA陶瓷支架的微观结构、相成分、烧结性能和力学性能的影响.结果表明:在相同的工艺条件下,球形粉体可以显著改善浆料的性能,影响浆料在支架上的涂覆量.因此球形粉体所制备的网状HA陶瓷支架的烧结性能和抗压强度明显优于针状粉体所制备的网状HA陶瓷支架,同时保持支架的贯通性和孔隙率.This paper adopts the sphere and acicular hydroxyapatite（HA） powder as the base to prepare highly porous HA ceramic scaffolds by polymer impregnation method, and studies the effect of different powder shape on sintering and mechanical properties in order to optimize the preparing process to improve the mechanical properties. Scanning electron microscope （ SEM ） , X-ray diffraction （XRD） , Fourier-transform infrared（FTIR） and compressive test are carried out to examine the microstrueture, phase composition and compressive strength of the two scaffolds. The results shows that the sphere powder has positive influence on the slurry＇ s properties in the same preparing process and further affects the coating amount on the sponge. Hence, the net HA ceramic scaffold fabricated by sphere particles can effectively improve sintering and compressive properties, and hold its connexion and high porosity.

关 键 词：羟基磷灰石(HA) 网状陶瓷 粉体形态 烧结性能 抗压强度 

分 类 号：R318.08[医药卫生—生物医学工程]