Phase behaviour of manganese-doped biphasic calcium phosphate ceramics synthesized via sol-gel method

Nawawi, N.A. and Sopyan, I. and Ramesh, S. and Afzeri, F (2011) Phase behaviour of manganese-doped biphasic calcium phosphate ceramics synthesized via sol-gel method. Asia-Pacific Journal of Chemical Engineering, 6 (6). pp. 823-831. ISSN 1932-2143

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Abstract

Manganese-doped biphasic calcium phosphate (Mn-doped BCP) powders have been synthesized via sol-gel technique. The Mn-doped BCP powders were studied for their phase behaviour at different concentrations of Mn (0, 0.01, 2, 5 and 15 mol) and calcination temperatures (500-1200 degrees C). For all the Mn concentrations, the X-ray diffraction (XRD) revealed that only hydroxyapatite (HA) and beta-tricalcium phosphate (beta-TCP) phases were present. It was shown that the HA crystallinity increased with increase in Mn content. Moreover, the weight loss at 700-850 degrees C detected by thermogravimetric analysis confirmed the presence of biphasic mixtures in the BCP powders. The study on effect of calcination temperature was done on the pure BCP and 5 mol Mn-BCP powder. The XRD revealed that the decomposition of HA to TCP took place at the temperature range of 700-800 degrees C. Fourier transform infrared spectroscopy and XRD measurements found that HA peaks increased with the increasing Mn content and temperature. This was also accompanied by the enlarging particles at higher calcination temperatures and Mn contents due to fusion of agglomerated particles. These findings have led to the conclusion that Mn has acted as a calcination additive for the BCP powder. Copyright (c) 2010 Curtin University of Technology and John Wiley & Sons, Ltd.

Item Type: Article
Additional Information: Times Cited: 0 Nawawi, Natasha Ahmad Sopyan, Iis Ramesh, Singh Afzeri --- you can e-mail to me for the full text of my jurnal at ramesh79@um.edu.my
Uncontrolled Keywords: Manganese biphasic calcium phosphate sol-gel phase behaviour calcination hydroxyapatite/beta-tricalcium phosphate sintering behavior substituted hydroxyapatite thermal-stability oxide tcp temperature mixtures ha
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 03 Jul 2013 02:07
Last Modified: 03 Jul 2013 02:07
URI: http://eprints.um.edu.my/id/eprint/6538

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