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Effect of Preparation Conditions on the Structure and Magnetic Properties of Metal-Doped Magnesium Ferrites Synthesized From Laterite Leaching Solutions

  • Jian-ming Gao
  • Fangqin Cheng
Original Paper
  • 81 Downloads

Abstract

In this paper, metal-doped magnesium ferrites (MgFe2O4) were synthesized from laterite leaching solutions using a coprecipitation-calcination method. The as-synthesized samples were characterized by x-ray diffraction (XRD), Fourier transform infrared spectrometer (FTIR), and physical property measurement system (PPMS) to determine the structure and magnetic properties. The effects of preparation conditions including precipitant reagents and metal ion concentrations in the laterite leaching solutions on the as-prepared spinel ferrites were investigated systematically. It is indicated that Ni–Co–Mn-doped MgFe2O4 and Mn–Al–Cr-doped MgFe2O4 could be synthesized from laterite leaching solutions by using sodium hydroxide (NaOH) and ammonia solution (NH3⋅H2O) as precipitant reagent, respectively. By adjusting the metal ion concentrations in the laterite leaching solutions, Ni–Co–Mn-doped MgFe2O4 with different substitution contents were obtained. With the Ni and Mn substitution content increasing, the lattice constant and average grain size decreased, while x-ray density increased correspondingly. Magnetic property tests indicated that all the as-prepared samples exhibited typical ferrimagnetic behavior at room temperature, and the saturation magnetization (Ms) depended on the Ni, Co, and Mn substitution content. Specifically, the Ms and Hc values of the as-prepared metal-doped MgFe2O4 sample with optimum substitution content of 0.185 could reach 33.22 emu g−1 and 53 Oe, respectively.

Keywords

Magnesium ferrite Metal-doped Structure Magnetic property Laterite leaching solutions 

Notes

Funding

The work was financially supported by the National Key R&D Program of China (No. 2017YFB0603102); the National Natural Science Foundation of China (Nos. 51272025, 50872011, and 51072022), and the National Basic Research Program of China (Nos. 2014CB643401 and 2013AA032003).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Institute of Resources and Environment Engineering, State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuanPeople’s Republic of China

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