Influence of Ultrasonic Irradiation Power on the Synthesis Kinetics of Nano-Hydroxyapatite Prepared by a Wet Chemical Process

Abstract:

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Nano-particle hydroxyapatite (HAp) was directly prepared by a wet chemical precipitation method with the aid of ultrasonic irradiation in solution using Ca(NO3)2, NH4H2PO4 and NH2CONH2 as source materials. The nano-HAp formation rate at different preparation temperatures and under different ultrasonic irradiation powers was measured and the influence of ultrasonic irradiation power on the synthesis kinetics of the nano-hydroxyapatite was investigated. It was found that the nano-HAp content increased with the increase of ultrasonic irradiation power, preparation temperature and reaction time. Under different ultrasonic irradiation power, an Arrhenius relationship was found between the nano-HAp formation rate and preparation temperature. It showed that with the increase of ultrasonic irradiation power from 100W to 200W and 300W, the synthesis activation energy of nano-HAp crystallites decrease from 63.2 KJ/mol to 59.9 KJ/mol and 48.1 kJ/mol respectively by calculation.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

2092-2095

DOI:

10.4028/www.scientific.net/KEM.336-338.2092

Citation:

L. Y. Cao et al., "Influence of Ultrasonic Irradiation Power on the Synthesis Kinetics of Nano-Hydroxyapatite Prepared by a Wet Chemical Process", Key Engineering Materials, Vols. 336-338, pp. 2092-2095, 2007

Online since:

April 2007

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$35.00

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