Abstract
MnZn power ferrites with a composition of Mn0.681-xZn0.246Fe2.073CoxO4 were prepared by conventional ceramic technique. The samples were sintered in a computer-driven furnace at 1320 °C for 4 h. Then the influences of Co-substitution on the crystalline structure, microstructure and the magnetic properties of MnZn power ferrite were studied. It shows that Co-substitution has not changed the structure of MnZn ferrite, but improved the crystallization. With the increase of Co substitution content, Co2+ ions firstly replace Mn2+ ions and then replace Fe3+ ions. And at room temperature, the initial permeability increases with the increase of Co-substitution content. Co-substitution can also reduce the porosity and the power loss. In addition, the corresponding temperature of the minimum power loss shifts to a lower temperature.
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References
P.J. Van der Zaag, New views on the dissipation in soft magnetic ferrites. J Magn Magn Mater 196–197, 315 (1999)
A.D.P. Rao, P.M.R. Rao, S.B. Raju, Dielectric unusual behaviour of Sn/Nb substituted Mn-Zn ferrites. Mater Chem Phys 65, 90 (2000)
Z.Y. Xu, Z. Yu, K. Sun et al., Microstructure and magnetic properties of Sn-substituted MnZn ferrites. J Magn Magn Mater 321, 2883 (2009)
A. Fujita, S. Gotoh, Temperature dependence of core loss in Co-substituted MnZn ferrites. J Appl Phys 93, 7477 (2003)
H.N. Ji, Z.W. Lan, Z. Yu et al., Influence of Sn-substitution on temperature dependence and magnetic disaccommodation of manganese–zinc ferrites. J Magn Magn Mater 321, 2121 (2009)
J. Zhu, K.J. Tseng, Reducing dielectric losses in MnZn ferrites by adding TiO2 and MoO3. IEEE Trans Magn 40, 3339 (2004)
A.D.P. Rao, B. Ramesh, P.R.M. Rao et al., Magnetic and microstructural properties of Sn/Nb substituted Mn–Zn ferrites. J Alloys Compd 282, 268 (1999)
A.D. Giles, F.F. Westendorp, The effect of cobalt substitutions on some properties of manganese zinc ferrites. J Phys D 9, 2117 (1976)
T.-J. Liang, H.-H. Nien, J.-F. Chen, Investigating the characteristics of cobalt-substituted MnZn ferrites by equivalent electrical elements. IEEE Trans Magn 43, 3816 (2007)
R. Morineau, M. Paulus, Chart of PO2 versus temperature and oxidation degree for Mn-Zn ferrites in the composition range: 50 < Fe2O3 < 54; 20 < MnO < 35; 11 < ZnO < 30 (mole %). IEEE Trans Magn 11, 1312 (1975)
C.F. Zhang, X.C. Zhong, H.Y. Yu et al., Effects of cobalt doping on the microstructure and magnetic properties of Mn–Zn ferrites prepared by the co-precipitation method. Phys B 404, 2327 (2009)
H. Shokrollahi, Magnetic properties and densification of Manganese–Zinc soft ferrites (Mn1-xZnxFe2O4) doped with low melting point oxides. J Magn Magn Mater 320, 463 (2008)
H. Shokrollahi, K. Janghorban, Influence of additives on the magnetic properties, microstructure and densification of Mn–Zn soft ferrites. Mater Sci Eng B 141, 91 (2007)
O. Inoue, N. Matsutani, K. Kugimiya, Low loss MnZn-ferrites: frequency dependence of minimum power loss temperature. IEEE Trans Magn 29, 3532 (1993)
Acknowledgments
This work was supported by the Natural Science Foundations of Zhejiang Province of China (No. LQ12E02001), Foundation of Zhejiang Educational Committee of China (No. Y201017252), Natural Science Foundation of China (No. 51302056), and Program for Key Innovative Team for Magnetic Materials of Zhejiang Province.
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Zhang, Q., Zheng, P., Zheng, L. et al. Effect of Co-substitution on the structure and magnetic properties of MnZn power ferrite. J Electroceram 32, 230–233 (2014). https://doi.org/10.1007/s10832-013-9878-9
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DOI: https://doi.org/10.1007/s10832-013-9878-9