Patent · US Active

Method for improving coercive force of epsilon-type iron oxide, and epsilon-type iron oxide

US9458026B2 · kind B2 · utility

1Cited by

0References

4Claims

0Family size

Assignees

THE UNIVERSITY OF TOKYO · JP
DOWA Electronics Materials Co., Ltd. · JP

Inventors

Shin-ichi Ohkoshi · Tokyo, JP
Shunsuke Sakurai · Yokohama, JP
Asuka Namai · Tokyo, JP
Sayaka Umeda · Tokyo, JP
Hiroshi Hachiya · Tokyo, JP
Kazuyuki Matsumoto · Tokyo, JP
Takashi Gotoh · Shioya, JP

Key dates

Filing date	Sep 30, 2010
Grant date	Oct 4, 2016
Priority date	—
Expiry date	Feb 20, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/761
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

To provide a method for improving a coercive force of epsilon-type iron oxide particles, and an epsilon-type iron oxide. Specifically, to provide a method for improving the coercive force of an epsilon-type iron oxide comprising: substituting Fe-site of the epsilon-type iron oxide with other element, while not substituting Fe of D-site in the epsilon-type iron oxide with other element, and the epsilon type iron oxide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.