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US 12,159,656 B2Granted
Magnetic recording medium, magnetic tape cartridge, and magnetic recording and reproducing device
AssigneeFUJIFILM Corporation
InventorsJunya Sawada, Noriko Oyanagi
Life of this patent
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Abstract
The magnetic recording medium includes a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which the magnetic layer includes an abrasive, the abrasive is a carbide, an average primary particle diameter of the abrasive is 10 nm or more and 100 nm or less, and in an electron microscope image of a surface of the magnetic layer, assuming that a total area occupied by the abrasive is 100%, a ratio of an area occupied by the abrasive present in an aggregated state having a maximum Feret diameter of 0.2 μm or more is 50% or more.
Claims15
A magnetic recording medium comprising:
- a non-magnetic support;
- and
- a magnetic layer containing a ferromagnetic powder,
- wherein the magnetic layer includes an abrasive,
- the abrasive is a carbide, the carbide is one or more selected from the group consisting of titanium carbide, tungsten carbide, zirconium carbide, silicon carbide, boron carbide, and vanadium carbide;
- and
- an average primary particle diameter of the abrasive is 10 nm or more and 90 nm or less, and
- in an electron microscope image of a surface of the magnetic layer, assuming that a total area occupied by the abrasive is 100%, a ratio of an area occupied by the abrasive present in an aggregated state having a maximum Feret diameter of 0.2 μm or more is 73% or more.
5 more elements
Dependencies are inferred from the claim text.