Invention Grant
- Patent Title: Method of producing a magnetic powder and method of producing a magnetic recording medium
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Application No.: US16330010Application Date: 2017-09-27
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Publication No.: US11521649B2Publication Date: 2022-12-06
- Inventor: Atsushi Muramatsu , Masafumi Nakaya , Masaru Terakawa , Satoru Abe , Natsuki Toyosawa , Katsunori Maeshima
- Applicant: SONY CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SONY CORPORATION
- Current Assignee: SONY CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JPJP2016-220999 20161111
- International Application: PCT/JP2017/034973 WO 20170927
- International Announcement: WO2018/088050 WO 20180517
- Main IPC: G11B5/714
- IPC: G11B5/714 ; C01G49/06 ; G11B5/65 ; G11B5/842 ; H01F1/00 ; H01F1/06 ; H01F1/11 ; G11B5/712 ; G11B5/706 ; B82Y25/00 ; B82Y40/00
Abstract:
A method of producing a magnetic powder includes: performing heat treatment on first particles that contain triiron tetraoxide to prepare second particles that contain ε-iron oxide.
Public/Granted literature
- US20210287714A1 METHOD OF PRODUCING A MAGNETIC POWDER AND METHOD OF PRODUCING A MAGNETIC RECORDING MEDIUM Public/Granted day:2021-09-16
Information query
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