Synthesis and characterization of porous nano crystalline biphasic calcium phosphate for bio applications

摘要

The nano crystalline biphasic calcium phosphates of hydroxyapatite (HAp)/β-tricalcium phosphate (β-TCp) in the ratio80:20 and 72:28 with interconnected porosity have successfully been prepared by co-precipitation method using mixedcatanionic surfactants as template. The sample was calcinated at various temperatures for 8 h. The samples werecharacterized using X-ray diffraction, Fourier transform infrared spectroscopy, Field emission scanning electronmicroscopy (FESEM) and thermal analyser. The samples calcinated at 750°C and 850°C show 75% and 89% ofcrystallinity respectively. Usually to obtain the biphasic calcium phosphates, either the medium will be set as acidic byaltering the pH or the Ca/P ratio can be set below the value of 1.5. However this experiment was neither conducted withlow Ca/P ratio (≤1.5) nor at low pH (≤7) to obtain the mixed phase. The combination of surfactants and calcinationtemperature controls the HAp/β-TCp ratio.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.