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Rare earth cobalt nickel-base 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 material and its preparation, can solve the problems of complex process, high production cost, and great influence on the quality of the final material, and achieve simple preparation process , cost reduction effect

Active Publication Date: 2017-12-01
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

[0034] 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 .

[0035] 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:

[0036] Step 1, Ingredients:

[0037] Preparation of Rare Earth Cobalt Nickel Based Low Temperature Amorphous Magnetic Refrigeration Material Ho 60 co 20 Ni 20 Raw material composition ratio, Ho, Co and Ni were weighed as raw materials respectively, and the weighed amount of Ho as raw material was 102% of the stoichiometric theoretical amount of raw material ratio, and the sum of the three raw materials weighed was 13g;

[0038] Step 2, smelting and solidification to prepare alloy ingots:

[0039] (1) Mix the raw materials weighed in the step 1, and put them into the smelting chamber of the smelting dev...

Embodiment 2

[0051] This embodiment is basically the same as Embodiment 1, especially in that:

[0052] 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 .

[0053] 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:

[0054] Step 1, Ingredients:

[0055] Preparation of Rare Earth Cobalt Nickel Based Low Temperature Amorphous Magnetic Refrigeration Material Ho 5 Er 55 co 18 Ni 22 Raw material composition ratio, respectively weigh Ho, Er, Co and Ni 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 Er as raw material is 103% of the stoichiometric theoretical dosage of the ratio, the sum of weighing 4 kinds of raw m...

Embodiment 3

[0069] This embodiment is basically the same as the previous embodiment, and the special features are:

[0070] 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 .

[0071] 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:

[0072] Step 1, Ingredients:

[0073] 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, respectively take Ho, Tm, Er, Co and Ni as raw material, and the weighed amount of Ho as raw material is 102% of the theoretical amount of stoichiometric calculation of raw material ratio, and the weighed amount of Tm as raw material is 103% of the stoichiometric theoretica...

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Abstract

The invention discloses a rare earth cobalt nickel-base low-temperature amorphous magnetic refrigeration material and a preparation method thereof. The material general formula is (HoaErbTmc)60CoxNiy, wherein a is 0-1, b is 0-1, c is 0-1, the sum of a, b and c is equal to 1, x is 14-28, y is 12-26, and the sum of x and y is equal to 40. The preparation method comprises the following steps that materials are prepared, specifically, rare earth is slightly excessive; the materials are smelted under the inert gas condition to be completely melted, natural cooling is conducted after heat preservation, repeated smelting is conducted, and alloy ingots with uniform components are obtained; after the surfaces of the alloy ingots are cleaned up, the alloy ingots are crushed into small-block alloy ingots; and an induction smelting melt-spinning device is adopted, the ingots are completely melted under the inert gas condition, melt-spinning is conducted after heat preservation, and the low-temperature amorphous magnetic refrigeration material is obtained. The low-temperature amorphous magnetic refrigeration material has the large magnetic entropy change near the magnetic transition temperature of the low-temperature amorphous magnetic refrigeration material, is low in cost and simple in preparation method, has 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 commonly 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 as magne...

Claims

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Application Information

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Patent Type & Authority Applications(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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