【摘要】 以牛松质骨为原料,采用低温煅烧工艺,通过调整浸泡溶液浓度及煅烧温度等工艺参数,制备出具有良好生物活性,并保持天然骨多孔结构的β-TCP/HAP双相生物陶瓷。并采用XRD,SEM等手段对其成分、微观结构进行表征。结果表明:所制备的β-TCP/HAP多孔生物陶瓷的大孔孔径在300~500μm之间,微孔孔径在1~5μm之间,具有良好的生物活性和生物可降解性。通过控制煅烧温度和浸泡溶液浓度,制备出含较高TCP的β-TCP/HAP多孔生物陶瓷,而煅烧温度或浸泡溶液浓度过高会导致制备的样品中TCP的含量降低,焦磷酸钙的含量增加。更多还原

【Abstract】 β-TCP/HAP biphasic bioceramic with good bioactivity and natural porous bone structure was fabricated by heating calcined bovine cancellouse bone with different quantities of NH4H2PO4 and sintered temperature.The crystalline phases and microstructure of specimens were determined by the XRD scanning electron microscope(SEM).The results revealed that the obtained β-TCP/HAP biphasic porous bioceramic with dimensions of 200~800 μm macropores and 1~5 μm micropores exhibited good biological activity and biodegradability.With NH4H2PO4 increasing in the calcined bovine bone,HAP would gradually convert into different crystalline phase compositions of TCP/HAP,TCP/HAP/Ca2P2O7 at high temperature.Similarly,raising the heating temperature,TCP would also gradually convert into Ca2P2O7.These results suggest that use different quantities of NH4H2PO4 as addition could improve the repeatability,precision and creditability of the study.更多还原