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Material capable of regulating and controlling magnetism and related magnetic effects through bending or twisting, preparation method of material and application of material

A technology related to magnetism and magnetism, which is applied in the direction of magnetic materials, magnetic objects, and the magnetism of inorganic materials, can solve the problems of complex pressure application methods, poor controllability, and application limitations, and achieve good magnetocaloric effect, strong torsion controllability, The effect of simple pressure application

Active Publication Date: 2020-05-29
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the method in the prior art for controlling magnetism by applying static pressure, which has a relatively single effect, poor controllability, complicated pressure application methods, and limited applications, and provides a method that can realize pulling or compressing by bending or twisting. Strain output, so as to realize the regulation of material magnetism and related magnetic effects, its preparation method and application

Method used

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  • Material capable of regulating and controlling magnetism and related magnetic effects through bending or twisting, preparation method of material and application of material
  • Material capable of regulating and controlling magnetism and related magnetic effects through bending or twisting, preparation method of material and application of material
  • Material capable of regulating and controlling magnetism and related magnetic effects through bending or twisting, preparation method of material and application of material

Examples

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Effect test

Embodiment 1

[0046] A material whose magnetism and related magnetic effects can be tuned by bending or twisting, its chemical formula is Ni 35 co 15 mn 33 Fe 2 Ti 15 , the material preparation method comprises the following steps:

[0047] (1) Ingredients: Weigh high-purity raw materials Ni, Mn, Fe, Co, Ti according to the ratio in the chemical formula, and carefully polish off the oxide layer on the surface of the required transition metal elements before ingredients.

[0048] Taking Mn as an example, it needs to be cleaned and smelted to ensure the purity of the raw material. The specific steps are as follows: 1) Put a certain amount of Mn element in the beaker, and then pour it into the beaker diluted with water at a volume ratio of about 1:1. Dilute hydrochloric acid solution to cause a chemical reaction, and stir it quickly with a glass rod during the reaction; 2) Wait until the oxide disappears and the surface of Mn shows a bright metallic luster, then quickly pour out the waste ...

Embodiment 2

[0055] A material whose magnetism and related magnetic effects can be tuned by bending or twisting, its chemical formula is Ni 38 co 12 mn 35 sn 5 , the material preparation method comprises the following steps:

[0056] (1) Ingredients: Weigh high-purity raw materials Ni, Mn, Co and Sn according to the ratio in the chemical formula, and carefully polish off the oxide layer on the surface of the required transition metal elements before ingredients.

[0057] (2) Melting: Melting is carried out in a water-cooled copper crucible electric arc furnace, and the electric arc furnace is cooled by a circulating water cooling system. The prepared raw materials are carefully placed at the bottom center of the copper crucible, and the positions of different samples are recorded, and then Lower the stove lid. Before starting smelting, the furnace must be evacuated. The vacuuming process is divided into two stages: first use a mechanical pump to pump to about 5 Pa, and then use a diff...

Embodiment 3

[0062] A material whose magnetism and related magnetic effects can be tuned by bending or twisting, its chemical formula is Ni 34 co a mn 30 Fe 5 Ge 10 , the material preparation method comprises the following steps:

[0063] (1) Ingredients: Weigh high-purity raw materials Ni, Mn, Fe, Co and Ge according to the ratio in the chemical formula. Before ingredients, carefully polish off the oxide layer on the surface of the transition metal elements.

[0064] (2) Melting: Melting is carried out in a water-cooled copper crucible electric arc furnace, and the electric arc furnace is cooled by a circulating water cooling system. The prepared raw materials are carefully placed at the bottom center of the copper crucible, and the positions of different samples are recorded, and then Before lowering the furnace lid to start smelting, the furnace must be evacuated. The vacuuming process is divided into two stages: first use a mechanical pump to pump to about 5 Pa, and then use a dif...

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Abstract

The invention belongs to the field of magnetic materials and relates to a material capable of regulating and controlling magnetism and related magnetic effects through bending or twisting, a preparation method of the material and application of the material. The chemical formula of the material is Ni50-aCoaMn35-bFebXc, wherein a is larger than or equal to 12 and smaller than or equal to 17, b is larger than or equal to 0 and smaller than or equal to 10, c is larger than or equal to 5 and smaller than or equal to 20, and X comprises Sn, Ga, In, Si, Ge, Ti, Zr, Hf, V, Nb and Ta. The preparationmethod of the material comprises the following steps of: carrying out electric arc melting on high-purity raw materials to obtain a NiMi-based alloy block; and carrying out melt rapid quenching on theblock under vacuum to obtain a phase-change thin strip material. According to a method for regulating and controlling magnetism by applying isostatic pressure in the prior, the effect of the method is single, the controllability of the method is poor, the pressure applying mode of the method is complex, and the application of the method is limited. With the preparation method of the invention adopted, the above problems in the prior art can be solved; the obtained phase-change alloy thin strip can show large magnetic regulation and control and large magnetocaloric effects near the room temperature, can be effectively applied to a magnetic refrigeration process, and can achieve strain output through bending or twisting; and therefore, the magnetism and related magnetic effects of the phase-change alloy thin strip are regulated and controlled, and the application prospect of the phase-change alloy thin strip is effectively expanded.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a material capable of regulating magnetism and related magnetic effects through bending or torsion, and a preparation method and application thereof. Background technique [0002] The inducing factors of martensitic transformation include magnetic field, temperature and strain, etc. In some magnetic material systems, the parent phase and the martensitic phase have different magnetic behaviors. When the martensitic transformation occurs, the interspacing of the magnetic atoms changes due to the distortion of the crystal lattice, which changes the magnetic properties of the material, so that the martensitic transformation is accompanied by a magnetic change. In the process of magnetic martensitic transformation, if the material undergoes martensitic transformation accompanied by magnetic transformations such as antiferromagnetic, ferromagnetic, and paramagnetic, it is easy to obt...

Claims

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Application Information

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IPC IPC(8): H01F1/01H01F41/00C22C30/00C22C1/02
CPCH01F1/015H01F41/00C22C30/00C22C1/02
Inventor 赵晓宇李勇温嘉红李领伟
Owner HANGZHOU DIANZI UNIV
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