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Bahman Nasiri-Tabrizi,Abbas Fahami,Reza Ebrahimi-Kahrizsangi 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
In the present investigation the effects of milling parameters (time, atmosphere, and media) andchemical composition of raw materials on the mechanochemical synthesis of nanocrystallinehydroxyapatite (n-HAp) were studied. For a comparative study of the mechanically activated samplesversus thermally treated specimen (natural origin), n-HAp was also produced via annealing of bovinebone at 800℃ for 2 h. The gained powders exhibited average sizes about 32 and 27 nm under airatmosphere, and about 32 and 34 nm under argon atmosphere. TEM images confirmed the formation ofn-HAp with various morphologies under different experimental conditions.
Bahman Nasiri-Tabrizi,Abbas Fahami 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Poorly crystalline nano-sized tricalcium phosphate powders were successfully synthesized by two distinct mechanochemical reactions. Results revealed that the structural features as well as morphological characteristics were influenced by the chemical composition of reagents. The obtained nanopowders exhibited average sizes about 21 and 28 nm. According to the TEM/SEM observations, the synthesized powders showed cluster-like structures composed of spheroidal particles with a mean size of about 23 nm and ellipsoidal particles with an average size of about 30 nm. The proposed method as a new vision in powder technology can be used for mass production of nanostructured tricalcium phosphates.