| 摘要 |
PURPOSE:To obtain a magnetic recording medium which has good color S/N, low noise level and good frequency characteristic and particularly reproduced output in a high-frequency range by making combination use of hexagonal ferrite magnetic powder and acicular ferromagnetic powder. CONSTITUTION:The hexagonal ferrite magnetic powder having >=5 plate ratio and <=600 oersted coercive force is selected. The ferromagnetic powder having >=4 acicular ratio, 6-100emu/g satd. magnetization and >=700 oersted coercive force is selected. The ratio of the hexagonal ferrite magnetic powder and the ferromagnetic powder is made <=20pts.wt. the former with respect to 80-100pts. wt. the latter, then the production of the magnetic recording medium having the good dispersibility of the magnetic paint contg. the above-mentioned magnetic powders is made easy. The resultant magnetic recording medium has the good S/N and the good high-frequency characteristic. The ratio of the hexagonal ferrite magnetic powder is more preferably about 20-5wt% with respect to about 80-95wt% ferromagnetic powder.
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