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Thermal Behavior and Phase Transformations of Biomimetic Oxygenated Apatites | Abstract

Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

ISSN: 0975-413X

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Abstract

Thermal Behavior and Phase Transformations of Biomimetic Oxygenated Apatites

Author(s): Soumia Belouafa*, Hassan Chaair and Khalid Digua

High temperature calcination is an essential step for the production of some apatite-based biomaterials. This requires an in-depth study of thermal stability and transformations during heating.

The thermal behavior and phase transformations of biomimetic oxygenated apatites, prepared from different calcium salts (CaCO3, Ca(NO3)2, CaCl2) and orthophosphate (H3PO4), are examined, in the present work by chemical analysis, thermo-gravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR) and by X-ray diffraction (XRD). The thermal analysis gives evidence for the dismutation of oxygenated species (O22-, O2) at 400°C and the decomposition of the non-stoichiometric apatitic structure to a biphasic mixture (hydroxyapatite (HAP) and beta-tricalcium phosphate (β-TCP) (HAP/β-TCP)) at 900ºC.


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