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Composite magnetic refrigeration material and preparation method and application thereof

A magnetic refrigeration material and magnetic refrigerator technology, which are applied in the directions of magnetic materials, heat exchange materials, inorganic material magnetism, etc., can solve problems such as poor thermal stability, decrease in thermal conductivity of basic magnetic refrigeration materials, and influence on heat exchange efficiency, etc. Achieve high mechanical properties, good magnetocaloric effect, easy operation

Inactive Publication Date: 2017-07-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low thermal conductivity of this adhesive, the bonded La(Fe,Si) 13 The thermal conductivity of the base magnetic refrigeration material drops significantly, seriously affecting its heat transfer efficiency
At the same time, since La(Fe,Si) 13 The thermal stability of hydride materials is poor, therefore, the thermosetting process will cause La(Fe,Si) 13 Hydride decomposition, not suitable for preparing La(Fe,Si) 13 Hydride material
Therefore, the molding process of magnetic refrigeration materials is still a worldwide problem, which seriously hinders the application of magnetic refrigeration materials in refrigerators.

Method used

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  • Composite magnetic refrigeration material and preparation method and application thereof
  • Composite magnetic refrigeration material and preparation method and application thereof
  • Composite magnetic refrigeration material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 80% LaFe 11.7 Si 1.3 C 0.2 h 1.8 +20% In composite magnetic refrigeration material and its preparation method:

[0046] 1) Using an agate mortar, LaFe 11.7 Si 1.3 C 0.2 h 1.8 The material and metal In are crushed, and the irregular particle powder smaller than 0.1mm is screened out through a 150-mesh standard sieve;

[0047] 2) According to 80% LaFe 11.7 Si 1.3 C 0.2 h 1.8 The volume ratio of +20% In mixes the powder obtained in step 1) evenly;

[0048] 3) Press the uniformly mixed powder in step 2) at a pressing temperature of 140°C, a pressure of 900 MPa, and a zero magnetic field for 10 minutes to obtain a cylindrical 80% LaFe with a diameter of Φ10mm. 11.7 Si 1.3 C 0.2 h 1.8 +20% In molding material;

[0049] 4) Curing the molding material prepared in step 3) at 20°C for 2 days to finally obtain 80% LaFe 11.7 Si 1.3 C 0.2 h 1.8 +20% In composite magnetic refrigeration material.

[0050] It is well known to those skilled in the art that conventio...

Embodiment 2

[0055] 70% LaFe 11.7 Si 1.3 C 0.2 h 1.8 +20% In+10% epoxy resin composite magnetic refrigeration material and its preparation method:

[0056] 1) Using an agate mortar, LaFe 11.7 Si 1.3 C 0.2 h 1.8 The material and metal In are crushed, and the irregular particle powder smaller than 0.07mm is screened out through a 200-mesh standard sieve;

[0057] 2) According to 70% LaFe 11.7 Si 1.3 C 0.2 h 1.8 The volume ratio of +20%In+10% epoxy resin mixes the powder obtained in step 1) evenly;

[0058] 3) Press the uniformly mixed powder in step 2) at a pressing temperature of 130°C, a pressure of 900 MPa, and a zero magnetic field for 5 minutes to obtain a Φ10mm cylindrical 70% LaFe 11.7 Si 1.3 C 0.2 h 1.8 +20% In+10% epoxy resin molding material;

[0059] 4) Curing the molding material prepared in step 3) at 20°C for 7 days to finally obtain 70% LaFe 11.7 Si 1.3 C 0.2 h 1.8 +20% In+10% epoxy resin composite magnetic refrigeration material.

[0060] 70% LaFe was tes...

Embodiment 3

[0063] 60%Mn 0.6 Fe 0.4 NiSi0.6 Ge 0.4 +20%Sn+20% epoxy resin composite magnetic refrigeration material and its preparation method:

[0064] 1) Using an agate mortar, Mn 0.6 Fe 0.4 NiSi 0.6 Ge 0.4 The material and metal Sn are crushed, and the irregular particle powder smaller than 0.15mm is screened out through a 100-mesh standard sieve;

[0065] 2) According to 60% Mn 0.6 Fe 0.4 NiSi 0.6 Ge 0.4 The volume ratio of +20%Sn+20% epoxy resin mixes the powder obtained in step 1) evenly;

[0066] 3) Press the uniformly mixed powder in step 2) for 15 minutes at a pressing temperature of 20°C, a pressure of 960 MPa, and a magnetic field of 1.5 T to obtain a cylindrical 60% Mn of Φ10 mm 0.6 Fe 0.4 NiSi 0.6 Ge 0.4 +20% Sn+20% epoxy resin molding material;

[0067] 4) Curing the molding material prepared in step 3) at 150°C for 5 days to finally obtain 60% Mn 0.6 Fe 0.4 NiSi 0.6 Ge 0.4 +20% Sn+20% epoxy resin composite magnetic refrigeration material.

[0068] It is ...

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Abstract

The invention provides a composite magnetic refrigeration material and a preparation method and application thereof. The composite magnetic refrigeration material is specifically composed of X, Y and Z, wherein X is one or more of magnetic refrigeration materials; Y is alloy of one or more elements of IB group, IIB group, IIIA group and IVA group; and Z is one or more of various binding agents frequently used in the prior art. The composite magnetic refrigeration material provided by the invention has higher mechanical performance compared with traditional magnetic refrigeration materials, has an excellent magnetocaloric effect and can be well applied to the field of magnetic refrigeration. The invention further discloses the preparation method of the composite magnetic refrigeration material. By means of the preparation method, composite magnetic refrigeration materials in any shape and with any dimension can be prepared according to actual requirements. In addition, the preparation method has the advantages that raw materials are rich, cost is low, the preparation process is simple, implementation is easy, and industrial production is achieved, and is of great significance on actual application.

Description

technical field [0001] The invention relates to a magnetic material, in particular to a composite magnetic refrigeration material used in magnetic refrigeration technology and a preparation method thereof, belonging to the field of magnetic refrigeration material preparation. Background technique [0002] In modern society, refrigeration and low-temperature technology play a very important role in improving people's living standards and working environment. It is related to many important areas of the national economy and people's livelihood. According to statistics, the annual energy consumption of the refrigeration industry accounts for more than 15% of the total energy consumption of the society. The refrigeration technology widely used at present is the traditional gas compression-expansion refrigeration technology, and the maximum efficiency of this technology is only 25% during refrigeration. It can be seen that the efficiency of this traditional refrigeration technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C30/00C22C32/00C22C28/00B22F3/02B22F1/00C09K5/14H01F1/01B22F1/10B22F1/103
CPCH01F1/017C09K5/14C22C28/00C22C30/00C22C32/0094C22C38/002C22C38/005C22C38/02B22F3/02C01P2002/88B22F1/103B22F1/10
Inventor 张虎王一旭吴美玲陶坤邢成芬肖亚宁
Owner UNIV OF SCI & TECH BEIJING
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