Ni-Co-Mn-In-Ge magnetic refrigeration alloy material and preparing method thereof

An alloy material, magnetic refrigeration technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problem of unsatisfactory magnetocaloric effect, etc., and achieve the effects of abundant reserves, good refrigeration capacity, and non-toxic thermal conductivity.

Active Publication Date: 2018-04-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been a lot of research work on the design and preparation of Ni-Mn-In alloys at home and abroad, especially for the substitution of elements in Ni-Mn-In alloys. The magnetocaloric effect is still not ideal
And the large hysteresis near the first-order phase transition has not been resolved

Method used

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  • Ni-Co-Mn-In-Ge magnetic refrigeration alloy material and preparing method thereof
  • Ni-Co-Mn-In-Ge magnetic refrigeration alloy material and preparing method thereof
  • Ni-Co-Mn-In-Ge magnetic refrigeration alloy material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ni-Co-Mn-In-Ge magnetic alloy, the sum of the moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:In:Ge=45:5:36.5:12.5:1.

[0032] Ni 45 co 5 mn 36.5 In 12.5 Ge 1 The preparation method of magnetic alloy comprises the following steps:

[0033] (1) Raw material ratio: according to the molar ratio of Ni:Co:Mn:In:Ge=45:5:36.5:12.5:1;

[0034] (2) Preparation of polycrystalline ingots: the raw materials weighed in step (1) were placed in a water-cooled copper crucible of a vacuum arc melting furnace, and the cavity of the arc melting furnace was evacuated to 3×10 -3 ~5×10 -3 After Pa, pass in an inert protective gas of 0.05MPa, repeat smelting for 4 to 5 times, and perform arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;

[0035] (3) Heat treatment: Ni 45co 5 mn 36.5 In 12.5 Ge 1 Alloy ingots were directly quenched in ice water after being kept at 1173K for 24h ...

Embodiment 2

[0039] Ni-Co-Mn-In-Ge magnetic refrigeration alloy material, the sum of the moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:In:Ge=45:5:36.5:11.5:2 .

[0040] The preparation method of Ni-Mn-In-Co-Cu magnetic refrigeration alloy material comprises the following steps:

[0041] (1) Raw material ratio: according to the molar ratio batching of Ni:Co:Mn:In:Ge=45:5:36.5:11.5:2;

[0042] (2) Preparation of polycrystalline ingots: the raw materials weighed in step (1) were placed in a water-cooled copper crucible of a vacuum arc melting furnace, and the cavity of the arc melting furnace was evacuated to 3×10 -3 ~5×10 -3 After Pa, pass in an inert protective gas of 0.05MPa, repeat smelting for 4 to 5 times, and conduct arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;

[0043] (3) Heat treatment: Ni 45 co 5 mn 36.5 In 11.5 Ge 2 Alloy ingots were directly quenched in ice wate...

Embodiment 3

[0047] Ni-Co-Mn-In-Ge magnetic refrigeration alloy material, the sum of the moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:In:Ge=45:5:36.5:10.5:3 .

[0048] Ni 45 co 5 mn 36.5 In 10.5 Ge 3 The preparation method of magnetic alloy comprises the following steps:

[0049] (1) Raw material ratio: according to the chemical formula Ni 45 co 5 mn 36.5 In 10.5 Ge 3 The molar ratio ingredients;

[0050] (2) Preparation of polycrystalline ingots: the raw materials weighed in step (1) were placed in a water-cooled copper crucible of a vacuum arc melting furnace, and the cavity of the arc melting furnace was evacuated to 3×10 -3 ~5×10 -3 After Pa, pass in an inert protective gas of 0.05MPa, repeat smelting for 4 to 5 times, and conduct arc smelting under electromagnetic stirring to obtain a polycrystalline parent alloy with uniform composition;

[0051] (3) Heat treatment: Ni 45 co 5 mn 36.5 In 10.5 Ge 3 Alloy ingots were dire...

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PUM

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Abstract

A Ni-Co-Mn-In-Ge magnetic refrigeration alloy material and a preparing method thereof belong to the technical field of magnetic refrigeration materials. The chemical molecular formula of the Ni-Co-Mn-In-Ge magnetic refrigeration alloy material is Ni45Co5Mn36.5In<13.5-x>Gex, and the molar number sum of elements in the alloy is 100, wherein x is greater than or equal to 1 and smaller than or equal to 4. In the invention, a poly-crystal ingot is prepared through raw material proportioning and vacuum arc repeated smelting, annealing is carried out under high-purity inert gas protection, and then,rapid water-cooling is carried out, so that a blocky blank of the Ni-Co-Mn-In-Ge magnetic refrigeration alloy is prepared. Under a 1.5T external magnetic field, through a heating magnetizing mode, theadiabatic temperature change range of the alloy block is 1.34-2.69K. The magnetic alloy material can have large adiabatic temperature change near a room temperature, and can be used as a magnetic refrigerating working medium in the working range of a wide temperature range with a great magnetothermal effect.

Description

technical field [0001] The invention belongs to alloy magnetic refrigeration materials in the field of magnetic refrigeration, in particular to a Ni-Co-Mn-In-Ge magnetic refrigeration alloy material and a preparation method. Background technique [0002] With the development of society, the improvement of refrigeration technology plays a vital role in people's life and work. Refrigeration appliances such as refrigerators and air conditioners are indispensable for people's lives. However, the highest efficiency of the currently used gas compression refrigeration technology is only 25%, and the noise is large, the volume is large, and the environment is polluted. Therefore, it is urgent to find a new refrigeration technology with high efficiency, energy saving and environmental protection. [0003] Magnetic refrigeration technology uses magnetic materials as the working medium to achieve the purpose of refrigeration through the magnetocaloric effect of the material itself. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/10H01F1/01
CPCC22C1/023C22C19/005C22C19/03C22C30/00C22F1/002C22F1/10H01F1/015
Inventor 李宗宾白嫄霞胡伟杨波赵骧左良
Owner NORTHEASTERN UNIV
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