| 摘要 |
PURPOSE:To provide high performance magnet characteristics in wet molding in magnetic field, by pressurizing and molding in magnetic field slurry in which oxide magnet powder particles are coated with a given amount of aluminum stearate, are mixed, and dispersed in liquid, and by firing the slurry. CONSTITUTION:Slurry in which oxide magnet powder is coated with aluminum stearate below 4.5wt% (not including 0wt%) serving as adhesive lubricant, is mixed, and is dispersed in liquid, is pressured and molded in magnetic field, and is fired to result in an anisotropic oxide magnet. For example, magnetic powder in which SrCO3 and Fe2O3 are mixed by a mol ratio of 1:5.8, are tentatively fired at 1,250 deg.C, and are pulverized, is mixed in a warm toluene solution in which aluminum stearate powder of 1.5wt% against 100wt% of the magnet powder is mixed, and is dried. This powder which is coated and mixed with aluminum stearate is pulverized in a ball mill using ethyl alcohol as a dispersing agent. After sully formed in this way is pressured and molded into a disk shape in magnetic field, it is fired. |
