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Ferromanganese-based magnetic composite material and design method and manufacturing method thereof

A composite material and design method technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problem of small working temperature range and achieve the effect of large working temperature span value

Active Publication Date: 2021-09-28
BAOTOU RES INST OF RARE EARTHS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working temperature range of the magnetic refrigeration materials in the above-mentioned patent documents is still very small
In addition, how to design FeMn-based magnetic refrigeration materials to guide the fabrication process of FeMn-based magnetic refrigeration materials has not been reported

Method used

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  • Ferromanganese-based magnetic composite material and design method and manufacturing method thereof
  • Ferromanganese-based magnetic composite material and design method and manufacturing method thereof
  • Ferromanganese-based magnetic composite material and design method and manufacturing method thereof

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Experimental program
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Embodiment 1

[0111] The design of embodiment 1-ferromanganese-based magnetic composite material

[0112] Step 1: The first layer of ferromanganese-based magnetic material, the second layer of ferromanganese-based magnetic material and the third layer of ferromanganese-based magnetic material are Mn 1.32 Fe 0.67 P 0.52 Si 0.49 , Mn 1.37 Fe 0.63 P 0.5 Si 0.5 and Mn 1.35 Fe 0.66 P 0.5 Si 0.5 , to establish the relationship between the magnetic entropy and isothermal magnetic entropy change of the ferromanganese-based magnetic composite material and the applied magnetic field strength, temperature, and the molar ratio of the three-layer ferromanganese-based magnetic material:

[0113]

[0114]

[0115] Step 2: Establish the following equations to compound and optimize the three-layer ferromanganese-based magnetic material:

[0116]

[0117]

[0118] In step 1 and step 2, z k is the molar ratio of each layer of ferromanganese-based magnetic material to the total ferrom...

Embodiment 2

[0130] Manufacture of embodiment 2-ferromanganese-based magnetic composite material

[0131] The magnetic material Mn with a molar ratio of 0.22:0.33:0.45 1.32 Fe 0.67 P 0.52 Si 0.49 , Mn 1.37 Fe 0.63 P 0.5 Si 0.5 , Mn 1.35 Fe 0.66 P 0.5 Si 0.5 The magnetic material sheets are respectively formed, and the ferromanganese-based magnetic composite material is formed by stacking the magnetic material sheets in sequence. Specific steps are as follows:

[0132] a) Under an argon atmosphere, Mn 1.32 Fe 0.67 P 0.52 Si 0.49 , Mn 1.37 Fe 0.63 P 0.5 Si 0.5 , Mn 1.35 Fe 0.66 P 0.5 Si 0.5 The required raw materials are mixed, and after mixing, they are ball milled for 10 hours and pressed into a flake green body; sealed in a quartz ampoule and placed in an argon atmosphere.

[0133] b) Sinter the sheet green body at 1373K for 2h, then anneal at 1123K for 20h, and then cool to room temperature in a vacuum sintering furnace. Then it is annealed for the second time ...

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Abstract

The invention discloses a ferromanganese-based magnetic composite material and a design method and manufacturing method thereof. The design method comprises the steps that firstly, relational expressions between the magnetic entropy of the ferromanganese-based magnetic composite material and the applied magnetic field intensity, between the magnetic entropy and temperature, between the magnetic entropy and the molar ratio of multiple layers of ferromanganese-based magnetic materials, between the isothermal magnetic entropy change of the ferromanganese-based magnetic composite material and the applied magnetic field intensity, between the isothermal magnetic entropy change and temperature and between the isothermal magnetic entropy change and the molar ratio of the multiple layers of ferromanganese-based magnetic materials are established; secondly, an equation is established to perform composite optimization on the multiple layers of ferromanganese-based magnetic materials; and thirdly, the molar ratio of each layer of ferromanganese-based magnetic material to all the ferromanganese-based magnetic materials is calculated. The designed ferromanganese-based magnetic composite material can keep a relatively large magnetothermal effect in a relatively wide working temperature range.

Description

technical field [0001] The invention relates to a ferromanganese-based magnetic composite material and a design method and a manufacturing method thereof, in particular to a ferromanganese-based magnetic composite material used for room temperature magnetic refrigerators and a design method and a manufacturing method thereof. Background technique [0002] At present, with the development of room temperature magnetic refrigeration technology, the refrigerant in room temperature magnetic refrigerators is particularly important. In recent years, great progress has been made in the research of room-temperature magnetic refrigeration materials. Among them, ferromanganese (Mn-Fe)-based magnetic refrigeration materials have the advantages of giant magnetocaloric effect, low price, and simple preparation process, and are expected to become commercialized in large quantities. Candidate materials for production. [0003] However, due to the structural phase transition and magnetic ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C22/00C22F1/16F25B21/00G06F30/20G06F113/26
CPCC22F1/16C22C22/00F25B21/00G06F30/20G06F2113/26Y02B30/00
Inventor 李炎林国星黄焦宏张英德戴默涵金培育
Owner BAOTOU RES INST OF RARE EARTHS
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