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A material capable of controlling magnetism and related magnetic effects by bending or twisting, its preparation method and application

A technology related to magnetism and bending strain, which is applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of application limitations, complicated pressure application methods, and single effect, and achieve high magnetic entropy change value, good magnetocaloric effect, Effects of Extended App Foreground

Active Publication Date: 2022-06-28
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A material capable of controlling magnetism and related magnetic effects by bending or twisting, its preparation method and application
  • A material capable of controlling magnetism and related magnetic effects by bending or twisting, its preparation method and application
  • A material capable of controlling magnetism and related magnetic effects by bending or twisting, its preparation method and application

Examples

Experimental program
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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 proportions 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, cleaning and smelting are required before ingredients to ensure the purity of the raw materials. The specific steps are as follows: 1) Put a certain amount of Mn in the beaker, and then pour the diluted 1:1 water by volume into the beaker. Dilute hydrochloric acid solution to make a chemical reaction, and use a glass rod to stir quickly during the reaction; 2) When the oxide disappears and the surface of Mn shows a bright metallic luster, quickly pour out the reacted waste solution...

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 proportions in the chemical formula, and carefully polish off the oxide layer on the surface of the required transition metal elements before ingredients.

[0057] (2) Smelting: smelting 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 in the bottom center of the copper crucible, and the positions of different samples are recorded, and then Lower the furnace cover. Before 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 ...

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 proportions in the chemical formula, and carefully polish off the oxide layer on the surface of the required transition metal elements before ingredients.

[0064] (2) Smelting: smelting 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 in the bottom center of the copper crucible, and the positions of different samples are recorded, and then Before lowering the furnace cover 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...

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Abstract

The invention relates to the field of magnetic materials, in particular to a material that can regulate magnetism and related magnetic effects by bending or twisting, and its chemical formula is Ni 50‑a co a mn 35‑b Fe b x c , where 12≤a≤17, 0≤b≤10, 5≤c≤20, X includes Sn, Ga, In, Si, Ge, Ti, Zr, Hf, V, Nb, Ta. The preparation method of the material is as follows: the high-purity raw material is melted by an electric arc to obtain a NiMi-based alloy block, and the block is subjected to melt rapid quenching under vacuum to obtain a phase change thin strip material. The invention overcomes the disadvantages of single effect, poor controllability, complicated pressure application method and limited application in the prior art by applying isostatic pressure to regulate the magnetic properties, and obtains a phase change alloy thin strip that can exhibit relatively high performance near room temperature. Large magnetic regulation and large magnetocaloric effect can be effectively applied in the magnetic refrigeration process, and the output of strain can be realized by bending or torsion, thereby regulating the magnetic properties and related magnetic effects of phase change alloy thin strips, effectively expanding the application prospects .

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a material whose magnetism and related magnetic effects can be regulated by bending or twisting, and a preparation method and application thereof. Background technique [0002] Inducing factors of martensitic transformation include magnetic field, temperature and strain. In some magnetic material systems, the parent phase and the martensite phase have different magnetic behaviors. When the martensitic transformation occurs, the magnetic atomic spacing changes due to the distortion of the lattice, which changes the magnetic properties of the material, so that the martensitic transformation is accompanied by changes in the magnetic properties. During the magnetic martensitic transformation, if the martensitic transformation of the material is accompanied by magnetic transformations such as antiferromagnetic, ferromagnetic, and paramagnetic, it is easy to obtain a large difference...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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