| 摘要 |
PURPOSE:To raise a packing ratio of particles per unit volume and to increase the output by allowing specific elements to bond or coexist with magnetoplumbite, by which barium ferrite, etc., is covered with cobalt, etc., and the particles can move easily in a dispersion. CONSTITUTION:A magnetoplumbite including AFe(12-k)MxO19 is bonded or made coexistent with such elements or alloys as iron elements, Fe, Co, Ni, etc., rare earth, Gd, Tb, Te, etc., chromium magnetic alloys, FeCo, CrO2, etc., to produce the magnetoplumbite with coexisting magnetic elements. In the formula of the magnetoplumbite, A represents one or more elements selected from Ba, Sr and Pb, M represents one or more kinds of substituted elements or combination of elements selected from In, Zn-Ge, Zn-Nb, Zn-V, Co-Ti and Co-Ce, and x is positive number 1-2, or 5. Thus, specific elements are made to bond or coexist with the magnetoplumbite. Thereby, barium ferrite is covered with cobalt, etc., and the particles can move easily in the dispersion. |
