Heat generation ability of nanosized Mg_1-XCu_XFe₂O₄ ferrite in an AC magnetic field

抄録

  Mg_0.4Cu_0.6Fe₂O₄ ferrite with the highest heat generation ability in AC magnetic field for the Mg_1-XCu_XFe₂O₄ (X=0-1.0) series was prepared by the solid reaction method, and then bead milled to examine the effect of particle size on the heat generation ability. Nanosized Mg_0.4Cu_0.6Fe₂O₄ was obtained by bead milling using 0.3 mm and 0.1 mm diameter ZrO₂ beads. The heat generation ability increased with decreasing particle diameter to ca. 16.1 nm. However, the heat generation ability decreased with decreasing particle diameter below 14.6 nm.