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A kind of ni-co-mn-in-ge magnetic refrigeration alloy material and preparation method

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 effect of abundant reserves, good refrigeration capacity, and excellent comprehensive performance.

Active Publication Date: 2019-08-09
NORTHEASTERN UNIV LIAONING
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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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  • A kind of ni-co-mn-in-ge magnetic refrigeration alloy material and preparation method
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  • A kind of ni-co-mn-in-ge magnetic refrigeration alloy material and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ni-Co-Mn-In-Ge magnetic alloy, the sum of 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 conduct 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 to o...

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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Abstract

A Ni‑Co‑Mn‑In‑Ge magnetic refrigeration alloy material and a preparation method 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 Ni 45 Co 5 Mn 36.5 In 13.5‑x Ge x , the sum of the number of moles of elements in the alloy is 100, where 1≤x≤4. This invention prepares polycrystalline ingots through raw material proportioning and vacuum arc smelting multiple times, annealing under the protection of high-purity inert gas, and then rapid water cooling to prepare Ni-Co-Mn-In-Ge magnetic refrigeration alloy blocks. blank. The alloy block of the present invention obtains an adiabatic temperature change range of 1.34-2.69K through heating and magnetization under an external magnetic field of 1.5T. The magnetic alloy material of the present invention can obtain a large adiabatic temperature change near room temperature, accompanied by a huge magnetocaloric effect, and can be used as a magnetic refrigeration working medium in a wide temperature range.

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 Patents(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 LIAONING
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