1995 Volume 68 Issue 1 Pages 21-30
Surface modification of maghemite magnetic particles by titanate coupling agents was performed. Good reactivity of titanate coupling agents to the surface of maghemite was confirmed. The magnetic paints of maghemite particles treated with titanate coupling agents showed excellent dispersibility. The magnetic recording tapes manufactured with these magnetic paints also showed excellent magnetic characteristics. The dispersibility of the paints was evaluated by observing the dependence of the orientation of magnetic particles on the alternating magnetic field. We have proven this novel evaluation method to be a useful method in evaluating the dispersibility of magnetic particles in these paints. This detailed analysis indicated that magnetic particles responded to the outer magnetic field in the primary particle unit.
