Patent · US Active

Anisotropic iron nitride permanent magnets

US11830644B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

NIRON MAGNETICS, INC. · US

Inventors

Francis Johnson · Minneapolis, US
Richard W. Greger · Corning, US
John M. Larson · Northfield, US
Yiming Wu · Nanhu, CN
Fan Zhang · Lake Barrington, US
Kathryn Sara DAMIEN · Minneapolis, US

Key dates

Filing date	Apr 12, 2022
Grant date	Nov 28, 2023
Priority date	—
Expiry date	Sep 10, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2004/64
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Disclosed herein is a permanent magnet comprising: a plurality of aligned iron nitride nanoparticles wherein the iron nitride nanoparticles include α″-Fe16N2 phase domains; wherein a ratio of integrated intensities of an α″-Fe16N2 (004) x-ray diffraction peak to an α″-α″-Fe16N2 (202) x-ray diffraction peak for the aligned iron nitride nanoparticles is greater than at least 7%, wherein the diffraction vector is parallel to alignment direction, and wherein the iron nitride nanoparticles exhibit a squareness measured parallel to the alignment direction that is greater than a squareness measured perpendicular to the alignment direction.

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