Preparation and magnetic properties of Mn-Zn ferrites by the Co-precipitation method

Xue Li; Ping Ren; Junxi Zhang; Lingsong Zhang; Guoping Liu

doi:10.1007/s11595-009-6875-6

Journal of Wuhan University of Technology Materials Science Edition ›› 2009, Vol. 24 ›› Issue (6) : 875 -878. DOI: 10.1007/s11595-009-6875-6

Article

Preparation and magnetic properties of Mn-Zn ferrites by the Co-precipitation method

Xue Li ¹^,²
, Ping Ren ²
, Junxi Zhang ¹^,²^,^{^c}
, Lingsong Zhang ²^,³
, Guoping Liu ³

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Abstract

Mn-Zn ferrites (Mn_1−xZn_xFe₂O₄) with different compositions were prepared by the coprecipitation method, and the influences of such synthesis conditions as pH value, composition and volume ratio (R) of the mixed solution and NH₄HCO₃ solution on their microstructures and magnetic properties were discussed. The samples were characterized by X-ray diffraction (XRD) and magnetization measurement instrument. Lattice parameters and average crystalline size of the synthesized materials were calculated from the corresponding XRD patterns with the related software Jade.5. For samples of different pH values, only one phase was found when pH values were 7.0, 8.0 and 9.0. The sample with pH value of 7.0 exhibited the highest saturation magnetic induction, the lowest coercive force, and crystallized best. For samples of different R values with pH value of 7.0, only one phase was observed in all samples, and the sample with R value of 2.3 exhibited the highest saturation magnetic induction and the lowest coercive force. The composition has mainly afected the magnetic properties, and the saturation magnetic induction increases with the increase of the content of Zn (x), but decreases when x is beyond 0.6. The trend of coercive force is on the contrary. However, no magnetism is exhibited when the x value is up to 0.8.

Keywords

co-precipitation method / microstructure / magnetic property / Mn-Zn ferrite

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Xue Li, Ping Ren, Junxi Zhang, Lingsong Zhang, Guoping Liu. Preparation and magnetic properties of Mn-Zn ferrites by the Co-precipitation method. Journal of Wuhan University of Technology Materials Science Edition, 2009, 24(6): 875-878 DOI:10.1007/s11595-009-6875-6

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