| 摘要 |
PURPOSE:To obtain highly stable ferromagnetic metal powder by immersing ferromagnetic metal powder in an organic solvent dissolving Al alkoxide compound or/and Al alkyl compound and thereafter precipitating and depositing Al compound on the ferromagnetic metal powder with addition of methanol. CONSTITUTION:The Al alkoxide compound and Al alkyl compound do not show particularly strong bindability to the ferromagnetic metal power even when such powder is immersed into an organic solvent under the condition that such compounds are dissolved into the solvent. However, with addition of methanol, Al(OCH3)3 is generated by replacing reaction between alkoxi group or alkyl group and methoxy group and it is uniformly deposited to the ferromagnetic metal particle surface. As the Al alkoxide compound, Al(OC2H5)3, Al(iso-OC3H7)3, Al(sec-OC4H9)3 may be used and as Al alkyl compound, Al(CH3)3, Al(C2H5)3, Al(C3H7)3, Al(C4H9)3 may be used. |
