| 申请日期 | 2025-07-08 | 申请号 | US15474418 |
| 公开（公告）号 | US20170287515A1 | 公开（公告）日 | 2017-10-05 |
| 公开国别 | US | 申请人省市代码 | 全国 |
| 申请人 | FUJIFILM Corporation | ||
| 简介 | The hexagonal ferrite powder has an activation volume of greater than or equal to 800 nm3 but less than 1, 200 nm3, a rare earth atom content falling within a range of 0.5 to 8.0 atom % per 100 atom % of iron atoms, and a localized presence of rare earth atoms in the surface layer portion, as well as is in the form of ellipsoidal powder. | ||
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