- Patent Title: Particles of β-iron oxyhydroxide-based compound, manufacturing method of the same, manufacturing method of particles of ϵ-iron oxide-based compound, and manufacturing method of magnetic recording medium
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Application No.: US16251097Application Date: 2019-01-18
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Publication No.: US11459244B2Publication Date: 2022-10-04
- Inventor: Kenji Naoi , Takashi Fujimoto , Masashi Shirata
- Applicant: FUJIFILM CORPORATION
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM CORPORATION
- Current Assignee: FUJIFILM CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Solaris Intellectual Property Group, PLLC
- Priority: JPJP2018-066008 20180329
- Main IPC: C01G49/02
- IPC: C01G49/02 ; H01F1/11 ; G11B5/706
Abstract:
Disclosed are a particle of a 13-iron oxyhydroxide-based compound represented by Formula (1), in which an average equivalent circle diameter of primary particles is 5 nm to 30 nm, and a coefficient of variation of equivalent circle diameters of the primary particles is 10% to 30% [In Formula (1), A represents at least one kind of metal element other than Fe, and a represents a number that satisfies a relationship of 0≤a
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