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Composite room temperature magnetic refrigerating material and its prepn.

A magnetic refrigeration material and magnetic refrigeration technology, applied in the direction of heat exchange materials, chemical instruments and methods, to achieve the effect of solving thermal conductivity, preventing oxidation and small magnetocaloric effect

Inactive Publication Date: 2003-01-08
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if room temperature magnetic refrigeration is to go to the market, it must first solve the problems of efficiency, reliability and economy

Method used

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  • Composite room temperature magnetic refrigerating material and its prepn.
  • Composite room temperature magnetic refrigerating material and its prepn.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: The room temperature magnetic refrigerant is gadolinium silicon germanium, and the heat transfer metal is aluminum. Its method of making is:

[0032] 1. The room temperature magnetic refrigeration refrigerant gadolinium silicon germanium is mechanically crushed into balls of suitable size, the size of which is 0.025 mm.

[0033] 2. Under the protection of argon atmosphere, the aluminum is heated to 934K to melt, and then put into the room temperature magnetic refrigerant gadolinium silicon germanium ball.

[0034] 3. Compress the gadolinium-silicon-germanium alloy in liquid aluminum at 934K, and cool it together with aluminum to form a solid.

[0035] 4. Process the composite material into 0.25mm balls by mechanical or other methods.

Embodiment 2

[0036] Embodiment 2: The magnetic refrigeration material at room temperature is gadolinium, and the carrier metal is copper. Its method of making is:

[0037] 1. The room temperature magnetic refrigerant gadolinium is mechanically crushed into gadolinium balls of a suitable size, the size of which is 0.025 mm.

[0038] 2. Under vacuum protection, heat the copper to the melting point of copper to melt it, and then put it into the room temperature magnetic refrigerant gadolinium ball.

[0039] 3. Compress the refrigerant gadolinium ball in the liquid copper, and cool it together with the copper into a solid.

[0040] 4. Process the material sheet into 0.5mm pellets by mechanical or other means.

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Abstract

The invention discloses a kind of compound room-temperature magnetism refrigerating material it is made up of room-temperature magnetism refrigerating working-medium and metal which serves can carrier for refrigerating working-medium and has a higher heat-conductivity than refrigerating working-medium, room-temperature magnesium refrigerating working-medium is filled into metal. Manufacturing method of the invention is: 1) room-temperature magnetism refrigeration working-medium is processed into particle; 2) selecting metal whose melting point is lowre than refrigerating working-medium and whose heat-conductivity is higher than refrigerating working-medium, the metal is heated and melted; 3) the refrigerating working-medium is put into melted metal liquid; 4) metal liquid full of refrigerating working-medium is cooled into solid.

Description

1. Technical field [0001] The invention relates to a kind of refrigeration working medium and its preparation method, in particular to the renormalization of magnetic materials used in room temperature magnetic refrigeration into spherical shapes and its preparation method. 2. Background technology [0002] The development of modern society and the improvement of the quality of life require a comfortable environment. As the blood of modern science, refrigeration technology has gradually developed and matured in the past 200 years, bringing comfort and enjoyment to human life, and providing science and technology. Research and Use the Platform. Since one-third of human energy is consumed in refrigeration, the state of refrigeration technology is of paramount importance to human survival. Refrigeration technologies mainly include liquid vaporization refrigeration, gas expansion refrigeration, adsorption refrigeration, thermoelectric refrigeration, vortex tube refrigeration, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14
Inventor 卢定伟
Owner NANJING UNIV