当前磁记录领域的重要课题是设法提高记录密度。提高记录密度的方法大致有以下几种:1)减少粒子尺寸;2)提高矫顽力,降低自减磁损失;3)增加粒子的填充密度,提高磁通密度,获得高输出;4)提高表面平滑性,减小间隙损失。1)～3)主要指磁性粒子本身特性,4)关系到磁浆和涂布技 An important issue in the field of current magnetic recording is to try to increase the recording density. There are several ways to improve the recording density: 1) to reduce the particle size; 2) to increase the coercivity and to reduce the self-demagnetization loss; 3) to increase the packing density of the particles and to increase the magnetic flux density for high output; 4) to improve Surface smoothness, reduce the gap loss. 1) ~ 3) Mainly refers to the characteristics of magnetic particles themselves, 4) related to magnetic paste and coating technology