Effect of Metal Substitution on the Magnetic Properties of Spinel Ferrites Synthesized from Zinc-Bearing Dust

This paper provides a facile way for comprehensive utilization of multi-metal-associated and intractable zinc-bearing dust to synthesize multi-metal-doped spinel ferrites. The effects of preparation conditions including mass ratios of zinc-bearing dust to MgO addition and calcination temperature on the purity of as-prepared samples were investigated in detail, as well as the effect of metal substitution on the magnetic properties of as-synthesized spinel ferrites. The results show that single-phase spinel ferrite could be obtained when the mixture with the mass ratio of zinc-bearing dust to MgO addition of 1:0.20 was calcined at 1000 ^∘C for 2 h. The saturation magnetization M_s values for Mg-substituted, Ni-substituted, and Mn-substituted ferrites are 43.2, 47.6, and 54.3 emu g^− 1, respectively, which can be explained by Neel's two sub-lattice collinear models and the cation distribution between the tetrahedron (A) sites and octahedral (B) sites of the as-prepared samples. Notably, the heavy metals leaching from the as-prepared samples are very limited compared with zinc-bearing dust. In this way, hazardous zinc-bearing dust could be comprehensively utilized to synthesize spinel ferrites with excellent magnetic properties.