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A new method of calcium nitrate and sodium phosphate as reactants was employed to prepare biomimetic apatite nanocrystals by a simple heating treatment in water. The structure and properties of the apatite crystals were investigated by TEM, XRD, IR, ICP and TG. It is found that the apatite nanocrystals contain OH-, CO32-, Na+ and HPO42- ions in their crystal structure. The crystal water is removed during heating from 200℃ to 400℃. CO32-and HPO42- are decomposed at 600℃ to 800℃, also there is lattice vvater lost at this temperature stage. The morphology of the apatite nanocrystals is needle-like with a length less than 80 nm. The size and crystallinity of the apatite nanocrystals increase with vvater treatment temperature and time. Compared to the apatite crystals sintered at 800℃, water treated apatite nanocrystals are poorly crystallized apatite. The results indicate that the apatite nanocrystals have similarity in composition, structure, morphology and crystallinity to that of bone apatite crystal
A new method of calcium nitrate and sodium phosphate as reactants was employed to prepare biomimetic apatite nanocrystals by a simple heating treatment in water. The structure and properties of the apatite crystals were investigated by TEM, XRD, IR, ICP and TG. that the apatite nanocrystals contain OH-, CO32-, Na + and HPO42- ions in their crystal structure. The crystal water is removed during heating from 200 ° C. to 400 ° C. CO32-and HPO42- are decomposed at 600 ° C. to 800 ° C., also Compared to a apatite nanocrystals is needle-like with a length less than 80 nm. The size and crystallinity of the apatite nanocrystals increase with vvater treatment temperature and time. Compared to the apatite crystals sintered at 800 ℃, water treated apatite nanocrystals are poorly crystallized apatite. The results that that apatite nanocrystals have similarity in composition, structure, morphology and crystallinity to that of bone apatite crystal