Gd-Mn-based amorphous magnetic refrigeration material and preparation method thereof

A magnetic refrigeration material, gd-mn technology, applied in the field of Gd-Mn-based amorphous magnetic refrigeration materials and its preparation, can solve the problems of poor corrosion resistance, low mechanical strength, narrow transition temperature range, etc., and achieve cost reduction and preparation The effect of simple process
CN102828129AInactive Publication Date: 2012-12-19SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2012-12-19
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to the field of magnetic materials and discloses a Gd-Mn-based amorphous magnetic refrigeration material and a preparation method thereof. The Gd-Mn-based amorphous magnetic refrigeration material has a chemical general formula of Gd65Mn35-xMx (x is greater than 0 and less than or equal to 10), wherein M represents Si or Ge. The preparation method comprises the following steps of 1, weighing pure elements according to a mass percentage of the elements shown in the chemical general formula and mixing, 2, repeatedly smelting the mixed elements to obtain a uniform alloy ingot, and 3, crushing the uniform alloy ingot into small blocks, and carrying out melt-spinning to obtain a stripe having the width of 1-2 millimeters and thickness of 30-50 micrometers, wherein the stripe is the Gd-Mn-based amorphous magnetic refrigeration material. The preparation method has simple processes, avoids long-term heat treatment, has a low cost and is suitable for industrial production. The Gd-Mn-based amorphous magnetic refrigeration material obtained by the preparation method can produce ferromagnetic-paramagnetic two-stage magnetic phase transition in magnetization, has a large refrigeration capacity and is suitable as a magnetic refrigeration material.
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Description

technical field

[0001] The invention relates to an amorphous magnetic material, in particular to a Gd-Mn based amorphous magnetic refrigeration material and a preparation method thereof. Background technique

[0002] With the enhancement of people's awareness of environmental protection and the aggravation of the global energy crisis, the traditional gas compression refrigeration technology is subject to more and more controversies and challenges. Even in the case of continuous technological innovation, its refrigeration efficiency is still only 5-10% of the reverse cycle of the Carnot heat engine, and the energy consumption is very serious. At the same time, the traditional gas refrigeration technology uses chemical liquid refrigerants (such as freon), which are easy to release chemicals that destroy the ozone layer during the operation of the refrigerator, leading to the intensification of the global warming effect. At present, emerging refrigeration technologies mainly i...

Claims

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