Preparation of β-TCP/HAP biphasic porous bioceramic

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 200~800μm macropores and 1~5μm 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.