Patent · US Active

Artificial permanent magnet and method for producing the artificial permanent magnet

US11087907B2 · kind B2 · utility

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0References

8Claims

0Family size

Assignee

Technische Universität Darmstadt · DE

Inventors

Konrad Löwe · Darmstadt, DE
Wilhelm Fernengel · Kleinostheim, DE
Konstantin Skokov · Darmstadt, DE
Oliver Gutfleisch · Darmstadt, DE

Key dates

Filing date	May 12, 2016
Grant date	Aug 10, 2021
Priority date	—
Expiry date	Dec 27, 2037

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F2304/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is provided for producing an artificial permanent magnet, in a powder preparation step a main phase powder, which includes a rare-earth transition metal compound with permanently magnetic properties and has a first average particle size, is prepared and an anisotropic powder, which has a higher anisotropy field strength than the main phase powder and has a second average particle size, is prepared, wherein the second average particle size is smaller than the first average particle size. In a subsequent powder mixing step, the main phase powder and the anisotropic powder are mixed together to form a powder mixture and, in a subsequent heat treatment step, this powder mixture with the main phase powder of the first average particle size and with the anisotropic powder of the second average particle size is sintered to form an artificial permanent magnet.

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