Synthesis and characterization of Sr(ZnZr)x Fe12−2xO19–PANI composites

Autor:	Y.S. Hong, C.L. Yuan, C.H. Lin
Rok vydání:	2011
Předmět:	Zirconium Materials science chemistry.chemical_element Zinc Coercivity Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry.chemical_compound Magnetization Lattice constant chemistry Polyaniline X-ray crystallography Particle size Composite material
Zdroj:	Journal of Magnetism and Magnetic Materials. 323:1851-1854
ISSN:	0304-8853
DOI:	10.1016/j.jmmm.2011.02.015
Popis:	Strontium zinc zirconium hexaferrites/polyaniline (Sr(ZnZr) x Fe 12−2 x O 19 –PANI, x =0, 0.5, 1.0) composites were synthesized by oxidative chemical polymerization of aniline in the presence of ammonium peroxydisulfate (APS). The structure and morphology of the product was characterized by FTIR, TGA and SEM. The particle size of the core material was found to be about 250–500 nm. After coating with polyaniline, the particle size of Sr(ZnZr) 0.5 Fe 11 O 19 –PANI composites grew upto 0.5–1.0 μm. XRD of the ferrites indicated that the structure of the core materials is hexagonal, with lattice constants around 5.886–5.885 A. It was found that the saturation magnetization ( M S ) and coercivity ( H C ) for Sr(ZnZr) x Fe 12−2 x O 19 –PANI composites decreased after polyaniline coating. The composite under applied magnetic field, exhibited ferromagnetic hysteretic loops with high saturation magnetization ( M S =18.9–3.8 emu/g) and coercivity ( H C =3850.0–583.91 Oe).
Databáze:	OpenAIRE
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