Rare-earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material and preparation method thereof

A magnetic refrigeration material, a technology of rare earth cobalt, applied in the field of rare earth cobalt nickel-based low-temperature amorphous magnetic refrigeration materials and its preparation, can solve the problems of complex process, high production cost, and great influence on the quality of final materials, and achieve cost reduction, The effect of simple preparation process

Active Publication Date: 2019-03-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation process of magnetic refrigeration materials in low-temperature regions is relatively complicated, and the heat treatment process has a great impact on the quality of the final material, and the production cost is high, so it is not suitable for large-scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, the general chemical formula of a rare-earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material is: Ho 60 co 20 Ni 20 ;

[0033] A rare-earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material Ho of the present invention 60 co 20 Ni 20 The preparation method comprises the following steps:

[0034] Step 1, Ingredients:

[0035] Preparation of Rare Earth Cobalt Nickel Based Low Temperature Amorphous Magnetic Refrigeration Material Ho 60 co 20 Ni 20 The ratio of raw material composition, take Ho, Co and Ni respectively as raw material, and the amount of Ho as raw material taken is 102% of the stoichiometric theoretical amount of raw material ratio, and the sum of weighing 3 kinds of raw materials is 13g;

[0036] Step 2, smelting and solidification to prepare alloy ingots:

[0037] (1) Mix the raw materials weighed in the step 1, and put them into the smelting chamber of the smelting device...

Embodiment 2

[0049] This embodiment is basically the same as Embodiment 1, and the special feature is that in this embodiment, the general chemical formula of a rare earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material is Ho 5 Er 55 co 18 Ni 22 ;

[0050] A rare-earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material Ho of the present invention 5 Er 55 co 18 Ni 22 The preparation method comprises the following steps:

[0051] Step 1, Ingredients:

[0052] Preparation of Rare Earth Cobalt Nickel Based Low Temperature Amorphous Magnetic Refrigeration Material Ho 5 Er 55 co 18 Ni 22 Ratio of raw material composition ratio, respectively weigh Ho, Er, Co and Ni as raw materials, and the weighing amount of Ho as raw material is 102% of the stoichiometric theoretical amount of raw material ratio, and the weighing amount of Er as raw material is raw material ratio 103% of the stoichiometric theoretical dosage of the ratio, the ...

Embodiment 3

[0066] This embodiment is basically the same as the previous embodiment, and the special feature is that in this embodiment, the general chemical formula of a rare earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material is Ho 50 T m 5 Er 5 co 15 Ni 25 ;

[0067] A rare-earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material Ho of the present invention 50 T m 5 Er 5 co 15 Ni 25 The preparation method comprises the following steps:

[0068] Step 1, Ingredients:

[0069] Preparation of Rare Earth Cobalt Nickel Based Low Temperature Amorphous Magnetic Refrigeration Material Ho 50 T m 5 Er 5 co 15 Ni 25 Raw material composition ratio, Ho, Tm, Er, Co and Ni are weighed respectively as raw materials, and the weighed amount of Ho as raw material is 102% of the stoichiometric theoretical amount of raw material ratio, and the weighed amount of Tm as raw material is The stoichiometric theoretical amount of raw materia...

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Abstract

The invention discloses a rare-earth cobalt-nickel-based low-temperature amorphous magnetic refrigeration material and a preparation method thereof; the general formula of the material is (Ho a Er b T m c ) 60 co x Ni y , where a is 0~1, b is 0~1, c is 0~1, and a+b+c=1; x is 14~28, y is 12~26, and x+y=40. The method of the present invention is as follows: prepare materials, slightly excessive rare earth; smelt to complete melting under inert gas conditions, naturally cool after heat preservation, and repeatedly smelt to obtain an alloy ingot with uniform composition; after the surface is cleaned, it is broken into small pieces of alloy ingot; The smelting and throwing belt device completely melts the ingot under the condition of inert gas, and throws the belt after heat preservation to obtain a low-temperature amorphous magnetic refrigeration material. The low-temperature amorphous magnetic refrigeration material of the present invention has large magnetic entropy change near its magnetic transition temperature, and has low cost, simple preparation method and good magnetic and thermal reversible properties, and has good application prospects in the field of low-temperature magnetic refrigeration.

Description

technical field [0001] The present invention relates to a rare earth material and its preparation process, or to an amorphous alloy material and its preparation process, and also to a magnetic functional material, in particular to a rare earth material containing Co or Ni and its preparation process, Or it particularly relates to an amorphous alloy material containing Co or Ni and a preparation process thereof, which are applied in the technical fields of magnetic functional materials, refrigeration functional materials and their preparation. Background technique [0002] With the development of low-temperature condensed matter physics and material science, environmental problems such as air pollution have attracted great attention. Based on the shortcomings of the currently widely used gas compression refrigeration technology, such as low cycle efficiency, large environmental pollution, and strong greenhouse effect of the refrigerant. Magnetocaloric effect, MCE, also known...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00C22C1/00C09K5/14
CPCC09K5/14C22C45/00C22C1/11
Inventor 张义坤杨洋徐晖李喜任忠鸣
Owner SHANGHAI UNIV
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