Title:
MAGNETIC POWDER PRODUCTION METHOD AND MAGNETIC RECORDING MEDIUM PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/189468
Kind Code:
A1
Abstract:
A magnetic powder production method that includes: covering the surface of silica-coated precursor particles with at least one type of coating agent out of metal chloride and sulfate; and sintering the precursor particles coated in the coating agent.
Inventors:
TOYOSAWA NATSUKI (JP)
FUJISAWA NORIKATSU (JP)
AKIMOTO YUTA (JP)
ABE SATORU (JP)
TERAKAWA MASARU (JP)
MAESHIMA KATSUNORI (JP)
MURAMATU ATSUSHI (JP)
NAKATANI MASASHI (JP)
FUJISAWA NORIKATSU (JP)
AKIMOTO YUTA (JP)
ABE SATORU (JP)
TERAKAWA MASARU (JP)
MAESHIMA KATSUNORI (JP)
MURAMATU ATSUSHI (JP)
NAKATANI MASASHI (JP)
Application Number:
PCT/JP2019/013367
Publication Date:
October 03, 2019
Filing Date:
March 27, 2019
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G11B5/842; C01G49/02; G11B5/706; H01F1/11
Foreign References:
| JPS6477901A | 1989-03-23 | |||
| JP2011173958A | 2011-09-08 | |||
| JP2017001944A | 2017-01-05 | |||
| JP2017024981A | 2017-02-02 | |||
| JP2011035006A | 2011-02-17 |
Attorney, Agent or Firm:
SUGIURA, Masatomo et al. (JP)
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