Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14093
Title: Phase and thermal stability of hydroxyapatite whiskers precipitated using amine additives
Authors: Zhang, H
Zhang, M 
Keywords: Hydroxyapatite whiskers
Thermal stability
Crystallinity and constitution
Morphology
Issue Date: 2011
Publisher: Pergamon Press
Source: Ceramics international, 2011, v. 37, no. 1, p. 279-286 How to cite?
Journal: Ceramics international 
Abstract: Two kinds of hydroxyapatite (HA) whiskers, prepared using urea and acetamide, were investigated to determine their thermal stability in air at 800-1200 degrees C. The thermal decomposition behavior and the phase stability of the whiskers upon heating were found to depend on the synthesis method, crystallinity and constitution of the whiskers. The phase transformation of the whiskers prepared using urea took place at a temperature below 800 degrees C due to low crystallinity and more carbonate and HPO4 ions substitutions. Long rod-like particles appeared in the products treated at 1000-1200 degrees C. However, the whiskers prepared using acetamide were morphologically and structurally stable at 1200 degrees C due to their high crystallinity and low ions substitution, but with minor TCP caused by the decomposition of HPO4 in the structure. Such whiskers would be useful and promising reinforcement, for fabricating highly reliable HA ceramics or composites either in dense or porous form.
URI: http://hdl.handle.net/10397/14093
ISSN: 0272-8842
EISSN: 1873-3956
DOI: 10.1016/j.ceramint.2010.08.038
Appears in Collections:Journal/Magazine Article

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