Magnetic nanoparticles, bulk nanocomposite magnets, and production thereof

a technology of nanocomposite magnets and magnetic nanoparticles, which is applied in the direction of magnetism of magnetic bodies, magnetic materials, inorganic material magnetism, etc., can solve the problems of difficult grain alignment of hard magnetic phases, difficult to control the critical length, and limited success of chemical synthesis methods in the synthesis of hard magnetic nanoparticles of rare-earth compounds
US20100054981A1Inactive Publication Date: 2010-03-04BOARD OF RGT THE UNIV OF TEXAS SYST
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
BOARD OF RGT THE UNIV OF TEXAS SYST
Publication Date
2010-03-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided herein are systems, methods, and compositions for magnetic nanoparticles and bulk nanocomposite magnets.
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Description

CROSS-RELATED APPLICATIONS

[0001] This application claims priority to U.S. provisional application Ser. No. 61 / 016,353, filed Dec. 21, 2007, incorporated by reference herein.GOVERNMENT RIGHTS STATEMENT

[0002] This invention is made under Government support DoD / MURI under Grant No. N00014-05-1-0497 and DoD / DARPA through ARO under Grant No. DAAD-19-03-1-0038. The U.S. Government may have certain rights to this invention.BACKGROUND OF THE INVENTION

[0003] The present invention relates generally to magnetic nanoparticles and more particularly to bulk magnetic nanocomposites.

[0004] The size distribution of nanoparticles obtained by ball milling can be wide compared with chemical synthesis methods. Chemical synthesis methods have limited success in the synthesis of hard magnetic nanoparticles of rare-earth compounds.

[0005] The grain size in nanocomposite magnets fabricated by conventional top-down methods, including mechanical alloying and rapid quenching, usually has a wide distribution, and can...

Claims

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