Ultrasonically accelerated synthesis of hydroxyapatite
作者： Y. Fang , D.K. Agrawal , D.M. Roy , R. Roy , P.W. Brown
关键词: Materials science 、 Hydrolysis 、 Scanning electron microscope 、 Nuclear chemistry 、 Aqueous solution 、 Brushite 、 Sonication 、 Ultrasonic sensor 、 Stereochemistry 、 Reaction mechanism 、 Ultrasound
摘要: Ultrasonic energy was used to accelerate the formation of hydroxyapatite (HAp). The experiments were carried out in aqueous systems on two different sets reactants: (1) a mixture Ca4(PO4)2O(TetCP) and CaHPO4 · 2H2O (brushite) (2) α–Ca3(PO4)2 (α–TCP). reaction exposed ultrasound 20 kHz for various times ranging from 5 80 min. products characterized by XRD SEM. Parallel without calibration. results show that substantially accelerates both reactions. With ultrasound, time required TetCP-brushite system complete forming HAp reduced 9 h 25 min at °C, 3 15 38 °C. At 87 α–TCP does not hydrolyze within 1 de-ionized water unless pH is adjusted. Hydrolysis induced sonication less than min, longer treatment homogeneous sol HAp.
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