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Material microcompuesto magnético permanente sin tierras raras y su método de obtención

Authors: Aragón Sánchez, Ana María; Marín, Pilar; Hernando, Antonio; Deledda, Stefano; Quesada, Adrián; Fernández Lozano, José Francisco; Bollero Real, Alberto; +1 Authors

Material microcompuesto magnético permanente sin tierras raras y su método de obtención

Abstract

[ES] Material microcompuesto magnético permanente sin tierras raras y su método de obtención. Se reivindica un material microcompuesto basado en imanes permanentes compuestos de partículas cerámicas de ferrita hexagonal magnéticamente duras y partículas de aleaciones metálicas magnéticamente blandas y su método de fabricación por aleado mecánico en presencia de un agente de acoplamiento. Los imanes permanentes sin tierras raras basados en nanopartículas presentan un método de producción industrial complejo y costoso. La invención describe la obtención un material composite basado en ferritas y aleaciones metálicas de tamaño micrométrico (no-nanométrico), mediante métodos de molienda mecánica. Se consigue un producto mediante un método de fabricación fácilmente escalable, industrializable y de bajo coste, con el que se obtienen materiales compuestos con propiedades magnéticas y microestructurales favorables caracterizados por presentar un aumento del producto máximo de energía (BHmax) de hasta un 30% respecto al componente mayoritario de ferrita.

[EN] The invention relates to a micro-composite material based on permanent magnets formed from magnetically hard ceramic particles of hexagonal ferrite and magnetically soft particles of metal alloys, and to the method for producing same by means of mechanical alloying in the presence of a coupling agent. Nanoparticle-based permanent magnets without rare earth elements have a complex and costly industrial production method. The invention describes the production of a composite material based on micro-scale (non-nano-scale) ferrite and metallic alloys, by means of mechanical grinding methods. A product is obtained using a low-cost, industrialisable, easily scalable production method, with which composite materials with favourable micro-structural and magnetic properties are obtained, said materials being characterised in that they have an increase in maximum energy product (BHmax) of up to 30% with respect to the main component of ferrite.

Universidad Complutense de Madrid, Institute for Energy Technology, IMDEA Naciociencias, Consejo Superior de Investigaciones Científicas (España)

A1 Solicitud de patente con informe sobre el estado de la técnica

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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