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Flexible MnNiTi-based magnetic phase change alloy material as well as preparation method, regulation and control method and application thereof

A technology of alloy material and magnetic phase transition, applied in magnetic materials, refrigeration and liquefaction, and magnetism of inorganic materials, etc., can solve the problems of poor practical feasibility and uncontrollable magnetic change, and achieve large-rotation magnetocaloric effect, magnetization and magnetic The effect of thermal effect enhancement and large magnetic entropy change effect

Active Publication Date: 2021-02-26
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a flexible MnNiTi-based magnetic phase change alloy with low-field anisotropy magnetocaloric effect in order to overcome the problems of uncontrollable change of magnetism and poor practical feasibility in the existing magnetic phase change material element doping control mode Material

Method used

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  • Flexible MnNiTi-based magnetic phase change alloy material as well as preparation method, regulation and control method and application thereof
  • Flexible MnNiTi-based magnetic phase change alloy material as well as preparation method, regulation and control method and application thereof
  • Flexible MnNiTi-based magnetic phase change alloy material as well as preparation method, regulation and control method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Ingredients: According to the chemical formula Mn 50 Ni 31.5 co 8.5 Ti 10 The ratio in the formula is to weigh high-purity raw materials Ni, Mn, Co, Ti, and carefully polish off the oxide layer on the surface of the required transition metal elements before mixing.

[0059] Taking Mn element as an example, it needs to be cleaned and smelted before ingredients to ensure the purity of raw materials. The specific steps are as follows:

[0060] 1) Put a certain amount of Mn elemental substance in the beaker, and then pour a dilute hydrochloric acid solution diluted with water with a volume ratio of about 1:1 to make a chemical reaction, and stir it quickly with a glass rod during the reaction;

[0061] 2) When the oxide disappears and the Mn surface shows a bright metallic luster, quickly pour out the waste solution after the reaction in the beaker:

[0062] 3) Rinse the reacted metal Mn with deionized water, rinse twice and then rinse twice with industrial alcohol;...

Embodiment 2

[0077] The difference between embodiment 2 and embodiment 1 is that the chemical formula of the flexible MnNiTi-based magnetic phase change alloy material (phase change ribbon material) is: Mn 50 Ni 28 co 10 Ti 12 , step (4) is different, and the rest of the process is exactly the same.

[0078] Step (4): Fully dissolve polyethylene glycol (PEG) and water at a mass ratio of 1:7; magnetically stir the prepared solution at a heating temperature of 50°C for 3 hours to obtain a PEG sol; Mn 50 Ni 28 co 10 Ti 12 Thin strips were placed on glass slides, and were spin-coated with PVA for 90s by a homogenizer. During the spin coating process, the speed of the homogenizer was 1000 r / min, so that Mn 50 Ni 28 co 10 Ti 12 The thin tape was completely adhered to the upper surface of the glass slide; the composite thin tape obtained after spin coating was dried at a heating temperature of 60°C and the drying time was 5 min to obtain a composite thin tape; then polydimethyl The sil...

Embodiment 3

[0080] The difference between embodiment 3 and embodiment 1 is that the chemical formula of the flexible MnNiTi-based magnetic phase change alloy material is: Mn 50 Ni 33 co 8 Ti 9 , step (4) is different, and the rest of the process is exactly the same.

[0081] Step (4): Fully dissolve polyethylene glycol (PEG) and water at a mass ratio of 1:8; magnetically stir the prepared solution at a heating temperature of 60°C for 2.5 hours to obtain a PEG sol; Mn 50 Ni 33 co 8 Ti 9 Thin strips were placed on glass slides, and were spin-coated with PVA for 90s by a homogenizer. During the spin coating process, the speed of the homogenizer was 1000 r / min, so that Mn 50 Ni 33 co 8 Ti 9 The thin tape was completely adhered to the upper surface of the glass slide; the composite thin tape obtained after spin coating was dried at a heating temperature of 70°C and the drying time was 3 min to obtain a composite thin tape; then the polyethylene naphthalate The glycol ester (PEN) sub...

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Abstract

The invention relates to the technical field of magnetic phase change alloy materials, and provides a flexible MnNiTi-based magnetic phase change alloy material as well as a preparation method, a regulation and control method and application thereof in order to solve the problems that an existing magnetic phase change material element doping regulation mode is uncontrollable in magnetic change andpoor in practical feasibility. The chemical formula of the flexible MnNiTi-based magnetic phase change alloy material is Mn50Ni50-a-bCobTia, wherein a is larger than or equal to 9 and smaller than orequal to 12, and b is larger than or equal to 8 and smaller than or equal to 10. According to the flexible MnNiTi-based magnetic phase change alloy material disclosed by the invention, the Co elementis doped into a MnNiTi-based Heusler alloy system, so that the obtained alloy can show a relatively large magnetic entropy change effect under a room temperature condition; The regulation and controlmethod is based on bending and rotating, the magnetic anisotropy of the flexible MnNiTi-based magnetic phase change alloy material is effectively regulated and controlled, a large rotating magnetocaloric effect can be easily obtained, the magnetization intensity and the magnetocaloric effect are both enhanced, and the strain-adjustable gyromagnetic effect is obtained.

Description

technical field [0001] The invention relates to the technical field of magnetic phase change alloy materials, in particular to a flexible MnNiTi-based magnetic phase change alloy material and its preparation method, control method and application. Background technique [0002] The ability of magnetic phase change materials to exhibit a large magnetocaloric effect near room temperature is the key to realizing effective magnetic refrigeration. The core of magnetocaloric effect material refrigeration is a magnetic phase change material that relies on various characteristics. It can absorb heat from the cold end of the cooling object and transport the heat to the hot end, and then reciprocate under the pressure, electric field or magnetic field. The heat is released to the environment, so as to achieve the cooling effect. Unlike the Freon volatile liquid refrigerant refrigeration used in refrigerators and air conditioners, the refrigeration cycle based on magnetocaloric materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C22/00C22C1/02C22F1/16F25B21/00H01F1/01
CPCC22C22/00C22C1/02C22F1/16H01F1/015F25B21/00Y02B30/00
Inventor 赵晓宇闫亚新温嘉红李勇李领伟
Owner HANGZHOU DIANZI UNIV
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