Adhesion La (Fe, Si)<13> bulk-shaped magnet with excellent heat-conducting property and preparation method therefor

A technology with thermal conductivity and lafe11.5si1.5, applied in magnetic objects, magnetic materials, metal processing equipment, etc., can solve problems such as reducing magnetic refrigeration efficiency and refrigerator life, blocking circulating air paths, and poor corrosion resistance. Achieve good magnetocaloric effect, excellent thermal conductivity and low cost

Active Publication Date: 2017-02-01
宁波智合志远企业管理合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] La(Fe,Si) 13 A major challenge to the practical application of compounds is the disadvantages of poor compressive strength, fragility, and poor corrosion resistance brought about by their strong magnetocrystalline coupling characteristics.
Especially La(Fe,Si) 13 The alloy will be pulverized directly after undergoing the hydrogenation process, which may block the circulation air path in the refrigeration cycle, reducing the efficiency of magnetic refrigeration and the life of the refrigerator

Method used

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  • Adhesion La (Fe, Si)&lt;13&gt; bulk-shaped magnet with excellent heat-conducting property and preparation method therefor
  • Adhesion La (Fe, Si)&lt;13&gt; bulk-shaped magnet with excellent heat-conducting property and preparation method therefor
  • Adhesion La (Fe, Si)&lt;13&gt; bulk-shaped magnet with excellent heat-conducting property and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: A bonded La(Fe,Si) with excellent thermal conductivity 13 The preparation method of the block magnet is carried out according to the following steps.

[0043] Step one, press LaFe 11.5 Si 1.5 Chemical formula ingredients;

[0044] In the second step, the raw materials prepared in the first step are put into the suspension melting furnace, vacuumized, and repeatedly smelted four times under the protection of argon to obtain alloy ingots;

[0045] In the third step, the alloy ingot smelted in the second step is sealed in a high-vacuum quartz tube, annealed at 1120 ° C for 21 days, the quartz tube is broken and quenched in ice water to prepare a NaZn 13 Structure LaFe 11.5 Si 1.5 Magnetocaloric effect alloy;

[0046]The fourth step is to cut the magnetocaloric alloy in the third step into irregular small particles, put them into an autoclave, and perform hydrogenation treatment at a hydrogen pressure of 5MPa and a temperature of 50°C to obtain LaFe 11.5 S...

Embodiment 2

[0061] Example 2: A bonded La(Fe,Si) with excellent thermal conductivity 13 The preparation method of the block magnet is carried out according to the following steps.

[0062] Step one, press LaFe 11.5 Si 1.5 Chemical formula ingredients;

[0063] In the second step, the raw materials prepared in the first step are put into the suspension melting furnace, vacuumized, and repeatedly smelted four times under the protection of argon to obtain alloy ingots;

[0064] In the third step, the alloy ingot smelted in the second step is sealed in a high-vacuum quartz tube, annealed at 1120 ° C for 21 days, the quartz tube is broken and quenched in ice water to prepare a NaZn 13 Structure LaFe 11.5 Si 1.5 Magnetocaloric effect alloy;

[0065] The fourth step is to cut the magnetocaloric alloy in the third step into irregular small particles, put them into an autoclave, and perform hydrogenation treatment at a hydrogen pressure of 5MPa and a temperature of 50°C to obtain LaFe 11.5 ...

Embodiment 3

[0081] Example 3: A bonded La(Fe,Si) with excellent thermal conductivity 13 The preparation method of the block magnet is carried out according to the following steps.

[0082] Step one, press LaFe 11.5 Si 1.5 Chemical formula ingredients;

[0083] In the second step, the raw materials prepared in the first step are put into the suspension melting furnace, vacuumized, and repeatedly smelted four times under the protection of argon to obtain alloy ingots;

[0084] In the third step, the alloy ingot smelted in the second step is sealed in a high-vacuum quartz tube, annealed at 1120 ° C for 21 days, the quartz tube is broken and quenched in ice water to prepare a NaZn 13 Structure LaFe 11.5 Si 1.5 Magnetocaloric effect alloy;

[0085] The fourth step is to cut the magnetocaloric alloy in the third step into irregular small particles, put them into an autoclave, and perform hydrogenation treatment at a hydrogen pressure of 5MPa and a temperature of 50°C to obtain LaFe 11.5 ...

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Abstract

The invention discloses an adhesion La (Fe, Si)<13> bulk-shaped magnet with excellent heat-conducting property and a preparation method therefor, and belongs to the technical field of a functional material. A LaFe<11.5>Si<1.5>H<1.65> magnet is prepared by taking LaFe<11.5>Si<1.5>H<1.65> magnetic powder as a magnetic material, taking sodium silicate as a main binder, and taking high-temperature-resistant epoxy resin as an auxiliary binder. The strength of the obtained magnet is greatly improved while the prepared magnet has excellent heat-conducting property. By adoption of the adhesion La (Fe, Si)<13> bulk-shaped magnet with the excellent heat-conducting property and the preparation method therefor, the obtained magnet has high magnetothermal effect, relatively high strength, and simple equipment in an implementation process, simple and convenient operation, relatively low cost, easy realization of large-scale production, high economic value, and high application prospect in the magnetic cooling field.

Description

technical field [0001] This patent invented a bonded La(Fe,Si) with excellent thermal conductivity 13 A block magnet and a preparation method thereof belong to the field of magnetic refrigeration materials in the room temperature region. Background technique [0002] Refrigeration technology is widely used in society, but the gas refrigerant used in the currently widely used gas compression refrigeration technology will destroy the atmospheric ozone layer and cause the greenhouse effect, and its work efficiency is very low. Exploring non-polluting, green and environmentally friendly refrigeration materials and developing new high-efficiency refrigeration technologies are urgent problems in today's world. [0003] Magnetic refrigeration technology has the characteristics of green environmental protection, high efficiency and energy saving, stable and reliable, and has attracted widespread attention at home and abroad in recent years. where La(Fe,Si) 13 The compound has a g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/22B22F1/00B22F3/02B22F3/04
CPCH01F1/14766H01F1/22B22F3/02B22F3/04B22F1/10
Inventor 岳明许磊张红国路清梅尹玉霞刘卫强
Owner 宁波智合志远企业管理合伙企业(有限合伙)
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