Microemulsion synthesis and magnetic properties of hydroxyapatite-encapsulated nano CoFe2O4

Autor:	Jamshid Amighian, S.A. Hassanzadeh-Tabrizi, Firoozeh Foroughi
Rok vydání:	2015
Předmět:	Materials science Nanostructure Nanoparticle Nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Chemical engineering law Transmission electron microscopy Phase (matter) Nano Microemulsion Calcination Fourier transform infrared spectroscopy
Zdroj:	Journal of Magnetism and Magnetic Materials. 382:182-187
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2015.01.075
Popis:	Hydroxyapatite-encapsulated cobalt ferrite (CoFe2O4) nanopowders were synthesized by one step microemulsion method. The powders were characterized by X-ray Diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, transmission electron microscopy and vibrating sample magnetometer. TEM results showed that nanoparticles calcined at 700 °C have core–shell morphology. It was found that the resultant phases, morphology and magnetic properties of the samples depend on calcining temperature. The synthesized nanoparticles showed a maximum saturation magnetization of 7.8 emu/g with a wasp-waisted hysteresis loop. The magnetion was reduced by increasing calcining temperature to 900 °C. This reduction is due to the reaction of cobalt ferrite with hydroxyapatite which leads to CaFe12(PO4)8(OH)12 phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6f2890dc6c131563f72bc5f1cce946ad https://doi.org/10.1016/j.jmmm.2015.01.075 Zobrazit plný text záznamu Full Text from ScienceDirect