| 摘要 |
PURPOSE:To obtain wet pulverized powder which has the improved magnetic characteristics and filling characteristics with a resin, by applying a specified amount of stearic acid metallic salt to the magnetic powder obtained by drying the wet pulverized material, mixing and then annealing the powder. CONSTITUTION:The material mixture having a composition represented by a general formula of MO.nFe2O3 (M is one kind or more of Ba, Sr, Pb; n=5.0-6.2) is pre-annealed at the temperature of 1,000 deg.C or more and the pre- annealed powder is roughly pulverized and them minutely pulverized. Next, this powder is annealed at the temperature of 800 deg.C or more. In this type of manufacture for magnet power to be used for a compound magnet, the annealing is accomplished after applying stearic acid metallic salt to the wet pulverized power by 0.5-3 weight per 100 weight magnetic powder and then mixing them. For example, the stearic acid metallic salt is applied to the dried wet pulverized powder and then the dry mixing treatment of them is carried out by means of a ball mill or a vibration mill. This dry mixing treatment allows the form of the wet pulverized powder particles to be round, and thus the filling characteristic and orientation thereof are improved. |
