| 摘要 |
A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer which comprises magnetic powder, a binder and alumina powder having an average primary particle size of not larger than 0.3 mu m and containing at least one oxide selected from the group consisting of oxides of silicon, magnesium, lanthanum and zirconium in an amount of 0.05 to 5 parts by weight per 100 parts by weight of alumina, which medium has improved durability, abrasion resistance and surface smoothness of a magnetic layer and good cleaning effect on a magnetic head. |
