A kind of Er-based amorphous low-temperature magnetic refrigeration material and preparation method thereof

A low-temperature magnetic refrigeration and amorphous technology, applied in the field of materials science, can solve the problems of small magnetic entropy and commercial application limitations, and achieve the effect of good thermal stability and good glass forming ability.
CN106978576BActive Publication Date: 2018-10-23NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2018-10-23
Patent Text Reader

Abstract

An Er-based amorphous low-temperature magnetic refrigeration material and a preparation method thereof; the general chemical formula of the material is: EraTbAlc, wherein T is one of Fe, Co, Ni or Cu, a is 56-63, and b is 18- 33, c is 16 to 28, and a+b+c=100; method: 1) prepare materials, slightly excessive Er; 2) arc melting under inert gas conditions until it is completely melted, naturally cool after heat preservation, and repeatedly smelt to obtain a uniform composition Alloy ingot; 3) After the surface is cleaned, it is broken into small pieces of alloy ingot; 4) The ingot is completely melted under the condition of inert gas by using an induction melting and throwing belt device, and the belt is thrown after heat preservation to obtain Er-based amorphous low temperature Magnetic refrigeration material; the material of the present invention has a width of 2-2.8mm and a thickness of 35-42m; under a magnetic field change of 0-7T, the magnetic transition temperature is 8-18K, the maximum magnetic entropy change is 12.6-22.5J / kgK, and the magnetic refrigeration capacity is 480- 620J / kg; glass transition temperature 550-640K, crystallization temperature 640-700K, cold liquid phase width 33-65K.
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Description

technical field

[0001] The invention belongs to the technical field of materials science and relates to a magnetic functional material, in particular to an Er-based amorphous low-temperature magnetic refrigeration material and a preparation method thereof. Background technique

[0002] Magnetic refrigeration material is a new type of magnetic functional material, which is a non-polluting refrigerant material that uses the magnetic entropy effect of magnetic materials to achieve refrigeration. The magnetic entropy effect is one of the intrinsic properties of magnetic materials, and its size depends on the intrinsic physical properties of magnetic materials. Magnetic refrigeration is the use of an external magnetic field to make the magnetic moment of the magnetic working medium change in an orderly and disorderly manner (phase transition), causing the magnet to absorb heat and release heat to perform a refrigeration cycle.

[0003] Magnetic refrigeration is considered as a "...

Claims

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