Abstract
Magnetite (Fe(3)O(4)) is an essential material for enhancing microwave absorption performance and is widespread and abundant as a solid solution in natural minerals and metallurgical slags. In this work, the effect of Mg(2+) on the structure, stabilization, and microwave absorption performance of magnesium-containing magnetite (Mg(x)Fe(3-x)O(4)) was investigated. On the basis of experiments on the reactions of Fe(2)O(3) and MgO under different levels of p(CO)/(p(CO) + p(CO2)), Mg(x)Fe(3-x)O(4 (x=0.0,0.2,0.4,0.6,1.0)) was synthesized, and Mg(2+) was found to inhibit the re-oxidation of magnetite. On this basis, the microwave absorption performance of various synthesized Mg(x)Fe(3-x)O(4) samples was measured and analyzed, where Mg(2+) was found to enhance the microwave absorption performance of Fe(3)O(4), and the RL(min) value of Mg(0.2)Fe(2.8)O(4) increased to -50.43 dB compared to that of -19.20 dB for Fe(3)O(4). Furthermore, the enhancement mechanism of Mg(2+) was revealed through impedance matching, dielectric and magnetic loss tangents, and magnetization curves, where the Mg(2+) ions were found to accelerate the hopping of electrons and change the impedance matching of Mg(x)Fe(3-x)O(4) to a more ideal state.