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Obtaining of Ni0.65Zn0.35Fe2O4/SiO2 nanocomposites by thermal decomposition of complex compounds embedded in silica matrix

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Abstract

This article presents the results of our investigation on the obtaining of Ni0.65Zn0.35Fe2O4 ferrite nanoparticles embedded in a SiO2 matrix using a modified sol–gel synthesis method, starting from tetraethylorthosilicate (TEOS), metal (FeIII,NiII,ZnII) nitrates and ethylene glycol (EG). This method consists in the formation of carboxylate type complexes, inside the silica matrix, used as forerunners for the ferrite/silica nanocomposites. We prepared gels with different compositions, in order to obtain, through a suitable thermal treatment, the nanocomposites (Ni0.65Zn0.35Fe2O4)x–(SiO2)100–x (where x=10, 20, 30, 40, 50, 60 mass%). The synthesized gels were studied by differential thermal analysis (DTA), thermogravimetry (TG) and FTIR spectroscopy.

The formation of Ni–Zn ferrite in the silica matrix and the behavior in an external magnetic field were studied by X-ray diffraction (XRD) and quasi-static magnetic measurements (50 Hz).

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Authors and Affiliations

  1. Faculty of Industrial Chemistry and Environmental Engineering, University ‘Politehnica’ of Timişoara, Timişoara, Romania, 300006, P-ta Victoriei nr. 2.

    Marcela Stoia, M. Stefanescu & I. Julean

  2. Faculty of Physics, West University of Timişoara, Timişoara, Romania, 300223, Bv. V. Parvan no. 4

    C. Caizer & P. Barvinschi

Authors
  1. Marcela Stoia
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  2. C. Caizer
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  3. M. Stefanescu
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  4. P. Barvinschi
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  5. I. Julean
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Correspondence to Marcela Stoia.

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Stoia, M., Caizer, C., Stefanescu, M. et al. Obtaining of Ni0.65Zn0.35Fe2O4/SiO2 nanocomposites by thermal decomposition of complex compounds embedded in silica matrix. J Therm Anal Calorim 88, 193–200 (2007). https://doi.org/10.1007/s10973-006-8004-5

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  • DOI: https://doi.org/10.1007/s10973-006-8004-5

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