| 摘要 |
PURPOSE:To inexpensively produce fine Ni-Zn ferrite raw material magnetic powder having high surface activity and readily sintering properties. CONSTITUTION:A heated solution comprising an immiscible organic solvent having >=100 deg.C boiling point is mixed with a water-soluble nickel compound, a water-soluble zinc compound, a water-soluble iron compound and hydrogen peroxide to form an emulsion, which is mixed with caustic soda to form precipitate of metal oxides and the prepared metal oxide powder is calcined at <=600 deg.C. |
