| 摘要 |
PURPOSE:To provide a method of manufacturing a low-priced iron oxide for ferrite whose material is mill scale and which has high magnetic characteristics of the same degree as that of iron oxide which is produced using iron chloride as its material. CONSTITUTION:After mill scale produced in iron hot rolling is pulverized to a mean particle size 10mum or less without oxidizing it, it is oxidized at 500 deg.C or more, and then the mill scale having the mean particle size 2mum or less or a particle distribution 1mum or less is pulverized to 20 or 70 volume %. |
