Effects of calcination temperature and solution pH value on the structural and magnetic properties of Ba2Co2Fe12O22 ferrite via EDTA-complexing process

Y-type hexagonal Ba2Co2Fe12O22 was prepared via a simple EDTA-complexing process using corresponding metal nitrates as raw materials and ethylene diamine tetraacetic acid (EDTA) as complexing agent. The decomposition process of the precursor, formation process of Ba2Co2Fe12O22, structure, morphology...

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Bibliographic Details
Published in:Materials chemistry and physics 2010-10, Vol.123 (2-3), p.551-556
Main Authors: Zhang, Chunxiang, Shi, Jianshe, Yang, Xujie, De, Lulu, Wang, Xin
Format: Article
Language:English
Subjects:
Calcination
Coercive force
EDTA
Ethylene
Ferrite
Magnetic properties
Metal nitrates
Scanning electron microscopy
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Summary:Y-type hexagonal Ba2Co2Fe12O22 was prepared via a simple EDTA-complexing process using corresponding metal nitrates as raw materials and ethylene diamine tetraacetic acid (EDTA) as complexing agent. The decomposition process of the precursor, formation process of Ba2Co2Fe12O22, structure, morphology and magnetic properties of the particles were investigated by thermogravimetric analysis and differential thermal analysis (TGA-DTA), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The effects of calcination temperature and solution pH value on the structure and magnetic properties of the particles were studied. The results showed that the formation of single phase Ba2Co2Fe12O22 was achieved by controlling the calcination temperature a[control][yen1000A degree C. Meanwhile, the pH value a[control][yen8 of initial solution was necessary to form stable metal-EDTA complexes and to produce high quality Ba2Co2Fe12O22. The magnetic properties showed dependence on the preparation conditions and microstructures. Saturation magnetization (M s) and coercivity (H c) were obtained in the range of 30.2-44.8emuga degree 1 and 91.7-1953.7Oe for samples calcined from 700 to 1200A degree C, and 28.8-33.4emuga degree 1 and 190.1-84.0Oe for samples from initial solution of pH 3.8-10.1.
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2010.05.013