METHOD FOR PRODUCING MAGNETIC POWDER AND METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM

Title:

METHOD FOR PRODUCING MAGNETIC POWDER AND METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM

Document Type and Number:

WIPO Patent Application WO/2018/088050

Kind Code:

A1

Abstract:

This method for producing a magnetic powder comprises a process for producing second particles that contain ε-iron oxide by subjecting first particles that contain triiron tetraoxide to a heat treatment.

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Inventors:

MURAMATSU ATSUSHI (JP)
NAKAYA MASAFUMI (JP)
TERAKAWA MASARU (JP)
ABE SATORU (JP)
TOYOSAWA NATSUKI (JP)
MAESHIMA KATSUNORI (JP)

Application Number:

PCT/JP2017/034973

Publication Date:

May 17, 2018

Filing Date:

September 27, 2017

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Assignee:

SONY CORP (JP)

International Classes:

G11B5/84; G11B5/706; G11B5/714; H01F1/11

Foreign References:

JP2011032496A	2011-02-17
JP2012212807A	2012-11-01
JP2016174135A	2016-09-29
JP2012231098A	2012-11-22
JP2017201672A	2017-11-09

Attorney, Agent or Firm:

SUGIURA, Masatomo et al. (JP)

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