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Influence of heat treatment atmosphere on the superparamagnetic iron oxide – hydroxyapatite composites

C. MIRESTEAN1, P. BERCE2, S. SIMON1,*

Affiliation

  1. Babes-Bolyai University, Faculty of Physics & Institute for Interdisciplinary Research in Bio-Nano-Sciences, 400084 Cluj-Napoca, Romania
  2. Technical University, Faculty of Machine Building & National Centre of Rapid Prototyping, 400641 Cluj-Napoca, Romania

Abstract

Hydroxyapatite with 20 mol % Fe2O3 was synthesized following the coprecipitation route. Heat treatment at 700 o C in either air or nitrogen flux was applied in order to develop finely dispersed superparamagnetic particles, either hematite or magnetite in the biocompatible hydroxyapatite phase. The X-ray diffraction patterns demonstrated the development of hydroxyapatite with crystallites size about 40 nm . The developed superparamagnetic particles have been proved by EPR as being mainly hematite in the case of normal air atmosphere, and magnetite in the case of nitrogen atmosphere..

Keywords

Hydroxyapatite, Superparamagnetic iron oxides, XRD, EPR.

Submitted at: Aug. 25, 2010
Accepted at: Sept. 15, 2010

Citation

C. MIRESTEAN, P. BERCE, S. SIMON, Influence of heat treatment atmosphere on the superparamagnetic iron oxide – hydroxyapatite composites, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 9, pp. 1899-1902 (2010)