Article,

Dielectrical and structural characterization of iron oxide added to hydroxyapatite

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BULLETIN OF MATERIALS SCIENCE, 31 (4): 635-638 (2008)
DOI: 10.1007/s12034-008-0101-6

Abstract

In this work we report preparation, structural and dielectric analyses of iron oxide added in hydroxyapatite bioceramic (Ca-10(PO4)(6)(OH)(2)-HAP). Hydroxyapatite is the main mineral constituent of teeth and bones with excellent biocompatibility with hard and muscle tissues. The samples were prepared through a calcination procedure associated with dry high-energy ball milling process with different iron concentrations (1, 2.5 and 5 wt%). The dielectric analyses were made measuring the sample impedance in the frequency range 1 kHz-10 MHz, at room temperature. The relative permittivity of the ceramics, at 10 MHz, are between 7.13 +/- 0.07 (1 wt%) and 6.20 +/- 0.11 (5 wt%) while e'' are between 0.0795 +/- 0.008 (1 wt%) and 0.067 +/- 0.012 (5 wt%). These characteristics were related to the sample microstructures studied by X-ray diffraction and SEM.

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