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Phase Evolution of Thermally Treated Amorphous Tricalcium Phosphate Nanoparticles

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Abstract:

X-ray amorphous tricalcium-phosphate nanoparticles (ATCP) produced by flame spray synthesis were heat-treated at temperatures between 500 and 1000 °C and analyzed in situ by X-ray powder diffraction. The main phase occurring after crystallisation at 525 °C was α-TCP, minor phases were identified as β-TCP and hydroxyapatite. More elevated temperatures induced crystallite growth and the transformation of α-TCP into β-TCP. Above 900 °C no α-TCP was traceable anymore. α’-TCP was not observed in the experiment. This study shows that nanoparticulate α-TCP can be obtained by thermal treatment of an amorphous TCP nanoparticle in a temperature range where sintering effects such as particle growth and densification are moderate or nearly negligible.

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Info:

Periodical:

Key Engineering Materials (Volumes 396-398)

Pages:

595-598

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.396-398.595

Citation:

Cite this paper

Online since:

October 2008

Authors:

Nicola Döbelin, Tobias J. Brunner, Wendelin J. Stark, Manuel Eggimann, Martin Fisch, Marc Bohner

Keywords:

Amorphous Calcium Phosphate (ACP), In Situ X-Ray Diffraction (XRD), Nanopowder, Ostwald Step Rule, α-TCP

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