A novel five-element layered magnetic material, its preparation method and application

A magnetic material, layered technology, applied in the field of materials, can solve the problems of not getting the target product, stoichiometric ratio shift, long holding time, etc., to achieve the effect of expanding the scope of use, improving the magnetic loss, and increasing the magnetic properties.

Active Publication Date: 2022-02-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common ternary layered MAX phase materials are relatively easy to synthesize by common hot-pressing methods, and from ternary to pentadic MAX phase materials, the A site of the MAX phase changes from a single element to three elements, and conventional synthesis methods require extremely High temperature, long holding time, and easy formation of extremely stable competing phases (such as FeC phase) during sintering and stoichiometric ratio shifts caused by volatilization of raw materials, these factors will lead to the failure of the target product in the end, so , it is extremely difficult to synthesize five-element layered materials by conventional hot-pressing sintering methods, and there is no report on multi-element layered magnetic materials containing multi-element magnetic elements.

Method used

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  • A novel five-element layered magnetic material, its preparation method and application
  • A novel five-element layered magnetic material, its preparation method and application
  • A novel five-element layered magnetic material, its preparation method and application

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Effect test

Embodiment 1

[0054] Embodiment 1: In this embodiment, the novel five-element layered magnetic material is V 2 (Sn x mn y co z ) C powder material.

[0055] The V 2 (Sn x mn y co z ) The preparation method of C powder is as follows:

[0056] (1) Weigh V powder, Sn powder, Co powder, MnCo alloy powder, carbon powder, inorganic salt (NaCl+KCl) according to the molar ratio of 4:1:0.99:0.99:1:3, and the above materials Grind and mix to obtain a mixture.

[0057] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are as follows: the reaction temperature is 1300° C., the holding time is 60 minutes, and the inert atmosphere is protected. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0058] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, stir and ultrasonica...

Embodiment 2

[0061] Embodiment 2: In this embodiment, the novel five-element layered magnetic material is V 2 (Sn x Fe y co z ) C powder material.

[0062] The V 2 (Sn x Fe y co z ) The preparation method of C powder is as follows:

[0063] (1) Weigh VC powder, Sn powder, Fe powder, Co powder and carbon powder according to the molar ratio of 2:1:0.01:0.01:1, grind and mix the above materials to obtain a mixture.

[0064] (2) Put the mixture in a corundum crucible and put it into a high-temperature tube furnace for reaction. The reaction conditions are as follows: the reaction temperature is 500° C., the holding time is 720 minutes, and the inert atmosphere is protected. After the temperature of the tube furnace dropped to room temperature, the reaction product in the crucible was taken out.

[0065] (3) Wash the reaction product with deionized water and alcohol: put the reaction product into a beaker, add deionized water, stir and ultrasonically clean for 30 minutes, then let it ...

Embodiment 3

[0068] Embodiment 3: In this embodiment, the novel five-element layered magnetic material is V 2 (Sn x Fe y Ni z ) C powder material.

[0069] The V 2 (Sn x Fe y Ni z ) The preparation method of C powder is as follows:

[0070] (1) Put V 2 o 5 Powder, Sn powder, Fe powder, FeNi alloy powder, carbon powder and KCl inorganic salt are weighed according to the molar ratio of 2.5:1:0.99:0.50:1:1.5, and the above materials are ground and mixed to obtain a mixture.

[0071] (2) Put the above powder mixture into a graphite mold, and then sinter by SPS. The sintering conditions are: 1100°C for 120min, heating rate of 100°C / min, argon protection, and pressure of 37MPa. After the reaction was over, the product was taken out.

[0072] (3) Remove the graphite paper on the surface of the obtained block, and then polish it to a mirror surface with sandpaper of different meshes, put it in an oven at 50° C., and take it out for 12 hours to obtain a block material.

[0073] Figur...

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Abstract

The invention discloses a novel five-element layered magnetic material, its preparation method and application. The chemical composition of the five-element layered magnetic material is expressed as A 2 (B x C y D. z )E 1 , where A is any one of Ta, Sc, Hf, V, Nb, Mo, Zr, Cr, Ti elements, B is any one of Al, Sn, Ga, In elements, C and D are magnetic element, and C and D are different, 0<x<1, 0<y<1, 0<z<1, and x+y+z=1, E is any one or both of C and N elements The combination. The novel five-element layered magnetic material of the invention has potential application prospects in the fields of electrochemical catalysis, wave absorption and the like.

Description

technical field [0001] The invention relates to a composite inorganic material, in particular to a novel five-element layered magnetic material, its preparation method and application, and belongs to the field of material technology. Background technique [0002] Due to their special properties, magnetic materials have great potential applications in the fields of data storage, recording, cooling, and electron spin. The giant magnetoresistance effect found in nano-layered magnetic materials has greatly aroused the interest of scientists. extensive attention. Taking Fe / MgO / Fe as an example, the single-crystal Fe / MgO / Fe magnetic tunnel structure has been predicted to have a huge tunnel magnetoresistance with a magnetoresistance ratio exceeding 1000%. The electronic band structure of bulk iron materials is directly related and delays the decay rate of the MgO barrier layer by incorporating symmetry-related tunneling. Its material structure is a magnetic layer similar to a san...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/01H01F41/00
CPCH01F1/01H01F41/00
Inventor 黄庆李友兵李勉周小兵陈科柴之芳黄政仁
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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