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Downfield-driven oriented Mn-Ni-Sn magnetic refrigeration alloy material, and production method of ribbon thereof

A technology of alloy materials and magnetic refrigeration, which is applied in the direction of magnetic materials, heat exchange materials, inorganic materials, etc., can solve unclear problems, achieve good cooling capacity, reduce the effect of hysteresis loss, and large cooling capacity

Active Publication Date: 2017-07-04
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is unclear whether this conclusion is applicable to Mn-Ni-Sn alloys, especially the effect of low magnetic field on the magnetocaloric properties of alloys has not been systematically studied.

Method used

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  • Downfield-driven oriented Mn-Ni-Sn magnetic refrigeration alloy material, and production method of ribbon thereof
  • Downfield-driven oriented Mn-Ni-Sn magnetic refrigeration alloy material, and production method of ribbon thereof
  • Downfield-driven oriented Mn-Ni-Sn magnetic refrigeration alloy material, and production method of ribbon thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The first embodiment provides a low magnetic field driven orientation Mn 45 Ni 43 Sn 12 The preparation method of the magnetic refrigeration alloy material thin strip specifically comprises the following steps:

[0054] (1) According to Mn 45 Ni 43 Sn 12 Chemical formula ingredients, respectively weighing Ni, Mn, Sn metal raw materials with a purity of 99.9%; the molar ratio of each element in the alloy is: Ni is 43%, Sn is 12%, Mn is 45%;

[0055] (2) Put the weighed raw materials into a water-cooled crucible, and extract the vacuum to reach 1×10 -3 When the Pa is below, argon gas is introduced to generate an electric arc, and the melting current is 200A. Each sample is turned over 3 times, and smelted 4 times in total to ensure uniform composition;

[0056] (3) Put the obtained polycrystalline ingot into a quartz tube with a small hole at the bottom, then place the quartz tube with the open end up in the furnace cavity of the belt thrower, and vacuumize until th...

Embodiment 2

[0062] The second embodiment provides a low magnetic field driven orientation Mn 42.7 Ni 44.1 Sn 13.2 The preparation method of the magnetic refrigeration alloy material thin strip specifically comprises the following steps:

[0063] (1) According to Mn 42.7 Ni 44.1 Sn 13.2 Chemical formula ingredients, respectively weighing Ni, Mn, Sn metal raw materials with a purity of 99.9%; the atomic percentages are: Ni is 44.1%, Mn is 42.7%, Sn is 13.2%;

[0064] (2) Put the weighed raw materials into a water-cooled crucible, and extract the vacuum to reach 1×10 -3 When the Pa is below, argon gas is introduced to generate an arc, and the melting current is 300A. Each sample is turned over 3 times, and smelted 4 times in total to ensure uniform composition;

[0065] (3) Put the obtained polycrystalline ingot into a quartz tube with a small hole at the bottom, then place the quartz tube with the open end up in the furnace cavity of the belt thrower, and vacuumize until the degree of v...

Embodiment 3

[0069] The preparation component is Mn 44.1 Ni 44.5 Sn 11.4 The alloy quick-quenched strip: except that the composition of the sample is Mn 44.1 Ni 44.5 Sn 11.4 , the atomic percentages are: Ni is 44.5%, Mn is 44.4%, Sn is 11.4%; and the annealing temperature is 1023K, the rest of the steps are the same as those in the first embodiment. In the preparation of oriented ribbon samples, it is obvious that large whole grains can be seen running through the ribbon direction. The martensitic transformation temperature is 295K under the magnetic field strength of 10kOe, ΔS M 8.9J / kg K(H ⊥ , 10kOe). Effectively suppressing the reduction of actual magnetic cooling capacity due to hysteresis loss, the cooling capacity reduction caused by hysteresis is approximately 11.4% (vertical to the stripe direction) and 28% (parallel stripe direction).

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Abstract

The invention relates to a downfield-driven oriented Mn-Ni-Sn magnetic refrigeration alloy material, and a production method of a ribbon thereof, and belongs to the technical field of magnetic refrigeration alloy materials and ribbons thereof. The technical problem of reduction of the hysteresis loss of the magnetic refrigeration material through using a large externally applied magnetic field of magnetic refrigerating machines is solved, so the prepared magnetic refrigeration alloy material is widely used in a common rare earth permanent magnet range of 8-12 kOe, the material has a large refrigeration capacity at a temperature near room temperature, and the hysteresis loss influence is effectively reduced. The chemical molecular formula of the Mn-Ni-Sn magnetic refrigeration alloy material is MnxNiySnz, wherein x, y and z are the molar ratios of elements, x is not less than 43.0 and not more than 47.0, y is not less than 41.0 and not more than 45.0, z is not less than 10.0 and not more than 13.0, and the value of x + y + z is 100. The production method comprises the following steps: proportioning raw materials, preparing polycrystalline cast ingots, preparing a Mn-Ni-Sn magnetic refrigeration alloy ribbon blank through a melt fast quenching technology, preparing the Mn-Ni-Sn magnetic refrigeration alloy ribbon, and finally preparing a Mn-Ni-Sn magnetic refrigeration alloy ribbon sample.

Description

technical field [0001] The invention belongs to the technical field of preparation technology of magnetic refrigeration alloy materials and thin strips thereof, and particularly relates to a low magnetic field driven oriented Mn-Ni-Sn magnetic refrigeration alloy material and a preparation method of thin strips. Background technique [0002] There are many basic properties of matter, and magnetism is one of its most important properties. From the macroscopic universe to the microscopic elementary particles that make up matter, it can be said to be magnetic to some extent. In modern society, human life is more and more inseparable from refrigeration technology. From people's daily life to industrial and agricultural production, national defense technology is inseparable from refrigeration technology. Traditional compression refrigeration Freon refrigerants are increasingly damaging to the ecological environment, especially to the ozone layer in the atmosphere, threatening the...

Claims

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Application Information

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IPC IPC(8): C22C30/04C22C1/02B22D11/06C09K5/14H01F1/01H01F41/02
CPCB22D11/0611C09K5/14C22C1/02C22C30/04C22C2202/02H01F1/015H01F41/0253
Inventor 陈峰华黄庆学张敏刚柴跃生宫长伟郭艳萍
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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