0.3–3 GHz magneto-dielectric properties of nanostructured NiZnCo ferrite from hydrothermal process
- 268 Downloads
A simple hydrothermal route with cetyltrimethylammonium bromide was proposed for directly synthesizing single-crystalline NiZnCo ferrite at 160 °C. X-ray diffraction patterns and micrographs indicate that products consist of spinel ferrite nanocrystals. The dielectric constant of NiZnCo ferrite is about 11 and the imaginary part of complex permittivity is 1.3. The saturation magnetization of Ni0.54Zn0.48Fe1.98O4 increases from 41.36 to 73.9 emu/g for Ni0.55Zn0.46Fe1.98O4 with a cobalt stoichiometry of 0.01. The real part μ′ of complex permeability for NiZnCo ferrite reaches 3 at 1 GHz. The imaginary part μ″ of NiZnCo ferrite has values higher than 1.2 within 0.7–3 GHz. Through the incorporation of the magnetic fillers, the low dielectric constant of the composites may meet the requirements of impedance matching to achieve maximal absorption of the electromagnetic energy in GHz frequency range.
KeywordsFerrite Complex Permittivity NiZn Zinc Ferrite High Frequency Field
This work was supported by the foundation of China ‘211’ engineering construction.
- 7.B. Parvatheeswara Rao, O.F. Caltun, Microstructure and magnetic behaviour of Ni-Zn-Co ferrites. J. Optoelectron. Adv. Mater. 8(3), 995–997 (2006)Google Scholar
- 8.S. Komarneni, E. Fregeau, E. Breval, Hydrothermal preparation of ultrafine ferrites and their sintering. J. Am. Ceram. Soc. 71(1), 26–28 (1998)Google Scholar
- 9.A.A. Burukhin, B.R. Churagulov, N.N. Oleinikov, Synthesis of nanosized ferrite powders from hydrothermal and supercritical solutions. Russian J. Inorg. Chem. 46(5), 646–651 (2001)Google Scholar
- 10.M. Rozman, M. Drofenik, Hydrothermal synthesis of manganese zinc ferrites. J. Am. Chem. Soc. 78(9), 2449–2455 (1995)Google Scholar
- 11.C. O’Handley Robert, Modern magnetic materials principles and application (Chemical Industry Publishing House, Beijing, 1996), pp. 175–194. 214–231 (in Chinese)Google Scholar
- 13.R. Dosoudil, V. Olah, Measurement of complex permeability in the RF band. J. Electric. Eng. 55, 97–100 (2004)Google Scholar
- 15.L.L. Hench, J.K. West, Principles of electronic ceramics (Wiley, New York, 1990), p. 189Google Scholar
- 17.S.L. Pereira, H.D. Pfannes, A.A.M. Filho, A comparative study of NiZn ferrites modified by the addition of cobalt. Mater. Resea. 2(3), 231–234 (1999)Google Scholar