A kind of ni-co-mn-sb-al magnetic refrigeration material and preparation method thereof

A ni-co-mn-sb-al, magnetic refrigeration material technology, applied in the direction of inorganic materials such as magnetism, can solve the problems of magnetic entropy change and magnetic refrigeration capacity, etc., to achieve larger magnetic entropy, increase magnetic entropy Variable, easy-to-process effects

Inactive Publication Date: 2021-07-13
HUBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of the magnetic refrigeration material Ni-Mn-Sb alloy with small magnetic entropy change and magnetic refrigeration capacity in the prior art, the present invention provides a Ni-Co-Mn-Sb-Al alloy material and a preparation method thereof. Compared with Ni-Mn-Sb alloy, the magnetic entropy change and magnetic refrigeration capacity of the alloy are greatly improved.

Method used

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  • A kind of ni-co-mn-sb-al magnetic refrigeration material and preparation method thereof
  • A kind of ni-co-mn-sb-al magnetic refrigeration material and preparation method thereof
  • A kind of ni-co-mn-sb-al magnetic refrigeration material and preparation method thereof

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Effect test

Embodiment 1

[0025] Ni-Co-Mn-Sb magnetic refrigeration alloy, the sum of moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:Sb=46:4:38:12. Its preparation method is as follows:

[0026] S1, according to the chemical formula Ni 46 co 4 mn 38 Sb 12 Weigh the metal element and ingredients.

[0027] S2. Put the raw materials prepared in S1 into the electric arc furnace, and evacuate to ≤3×10 -3 Pa, after cleaning once with high-purity argon (purity 99.996wt%), under the protection of 0.5 atmospheres of high-purity argon (purity 99.996wt%), the arc is started, and the melting is repeated 4 times, and the melting current is 120A. After the smelting is finished, it is cooled in a copper crucible to obtain a cast alloy ingot.

[0028] S3. Vacuum-seal the alloy ingot obtained in step S2, heat it at 900°C for 24 hours, at 720°C for 2 hours, at 700°C for 5 hours, and at 500°C for 20 hours, and finally cool it to room temperature with the furnace to break...

Embodiment 2

[0039] Ni-Co-Mn-Sb-Al magnetic refrigeration alloy, the sum of moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:Sb:Al=46:4:38:11.75:0.25. Its specific preparation process is as follows:

[0040] S1, according to the chemical formula Ni 46 co 4 mn 38 Sb 11.75 al 0.25 Weigh the metal element and ingredients.

[0041] S2. Put the raw materials prepared in S1 into the electric arc furnace respectively, and evacuate to ≤3×10 -3 Pa, after cleaning once with high-purity argon (purity 99.996wt%), under the protection of 0.5 atmospheres of high-purity argon (purity 99.996wt%), the arc was started, and the melting was repeated 4 times, and the melting current was 120A. After the smelting is finished, it is cooled in a copper crucible to obtain a cast alloy ingot.

[0042] S3. Vacuum-seal the alloy ingot obtained in S2, keep it at 900°C for 24 hours, at 720°C for 2 hours, at 700°C for 5 hours, at 500°C for 20 hours, and finally cool to ro...

Embodiment 3

[0046] Ni-Co-Mn-Sb-Al magnetic refrigeration alloy, the sum of moles of elements in the alloy material is 100, and the molar ratio of elements is Ni:Co:Mn:Sb:Al=46:4:38:11.5:0.5. Its specific preparation process is as follows:

[0047] S1, according to the chemical formula Ni 46 co 4 mn 38 Sb 11.5 al 0.5 Weigh the metal element and ingredients.

[0048] S2. Put the raw materials prepared in S1 into the electric arc furnace respectively, and evacuate to 3×10 -3 Below Pa, after cleaning once with high-purity argon (purity 99.996wt%), under the protection of 0.5 atmospheres of high-purity argon (purity 99.996wt%), the arc is started, and the melting is repeated 4 times, and the melting current is 120A . After the smelting is finished, it is cooled in a copper crucible to obtain a cast alloy ingot.

[0049] S3. Vacuum-seal the alloy ingot obtained in S2, keep it at 900°C for 24 hours, at 720°C for 2 hours, at 700°C for 5 hours, at 500°C for 20 hours, and finally cool to ro...

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Abstract

A kind of Ni-Co-Mn-Sb-Al magnetic refrigeration alloy material and preparation method thereof, the chemical general formula of described Ni-Co-Mn-Sb-Al material is Ni 46 co 4 mn 38 Sb 12‑x Al x , where 0≤x≤0.5. In the invention, the as-cast alloy ingot is prepared through raw material proportioning, repeated vacuum arc melting, and annealing treatment, thereby preparing a Ni-Co-Mn-Sb-Al magnetic refrigeration alloy block. The magnetic refrigeration material prepared by the invention has large magnetic entropy, good refrigeration effect, good mechanical properties, easy processing, simple and easy preparation method and good application prospect.

Description

technical field [0001] The invention belongs to the field of magnetic functional materials, and in particular relates to a Ni-Co-Mn-Sb-Al magnetic refrigeration material and a preparation method thereof. Background technique [0002] Refrigeration technology provides convenience for people's daily production and life. Traditional vapor compression cooling technology will produce a large amount of greenhouse gases and damage the ozone layer, while magnetic refrigeration technology with magnetocaloric effect will not produce any gas and is environmentally friendly. Therefore, magnetic refrigeration technology based on magnetocaloric effect is the traditional vapor compression cooling technology. The development of materials with large magnetocaloric effect is one of the key factors in magnetic refrigeration technology. [0003] Room-temperature magnetic refrigeration materials with giant magnetocaloric effect, such as LaFe x Si 1.4 h y 、Gd 5 (Si X Ge 1-X ) 4 , MnFeP 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/00H01F1/01
Inventor 罗丰杨昌平王瑞龙梁世恒黄秋安肖海波
Owner HUBEI UNIV
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