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Ferromagnetism room-temp. magnetic refrigerating material and its preparation method

A technology of magnetic refrigeration material and manufacturing method, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., to achieve the effects of preventing oxidation, reducing small size, and improving circulation speed.

Inactive Publication Date: 2004-08-11
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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  • Ferromagnetism room-temp. magnetic refrigerating material and its preparation method
  • Ferromagnetism room-temp. magnetic refrigerating material and its preparation method
  • Ferromagnetism room-temp. magnetic refrigerating material and its preparation method

Examples

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Embodiment 1

[0018] Embodiment 1: The ferromagnetic room-temperature magnetic refrigeration material that the present invention makes is formed by lamination of material sheet units, and its thickness of the formed sheet stack is 5 millimeters, and a diameter of 1 millimeter is provided every 5 millimeters between the material sheet units. , A small round platform with a height of 0.05mm forms a channel for fluid flow between the material sheet units. The material sheet unit is composed of two layers of copper skins with a thickness of 0.01mm. A metal aluminum layer is arranged between the copper skins. It is filled with room-temperature magnetic refrigerant, which is gadolinium-silicon-germanium alloy powder, the particle size of the alloy powder is 0.005 mm, and the thickness of the material sheet unit is 0.1 mm. Its specific production process is as follows:

[0019] 1. Mechanically pulverize the room-temperature magnetic refrigerant gadolinium-silicon-germanium alloy into rolling balls...

Embodiment 2

[0025] Embodiment 2: The structure and manufacturing method of the ferromagnetic room temperature refrigeration material are basically the same as in Example 1, except that the particle diameter of the ferromagnetic room temperature refrigeration working medium is 0.01 mm, and the thickness of the material sheet unit is 0.05 mm. Spherical metal powder with a particle size of 0.05 mm is sprinkled between the sheet units, and the thickness of the stack formed after the material sheet units are laminated is 90 mm.

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Abstract

The present invention discloses a ferromagentic room-temp. magentic refrigerating material and its production method. Said material is made up by laminating material sheet units, between material sheet units the projected points are set, said material sheet unit includes upper and lower two layers of metal, and between metal skins the metal carrier layer of ferromagnetic room-temp. magnetic refrigerating work medium is filled up. The production method of said material includes the following steps: making refrigerating work medium into powder, melting metal as work medium carrier, adding the above-mentioned work medium, selecting metal skin, tightly sealing the work medium carrier metal between two metal skins, pressing them and making them into material sheet unit, and laminating the material sheet units so as to obtain the invented material sheet group.

Description

1. Technical field [0001] The invention relates to a kind of refrigeration working fluid and its preparation method. Magnets, in particular to the sheet-loading and molding of ferromagnetic materials used for magnetic refrigeration at room temperature 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 also 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 refrig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/00
Inventor 卢定伟
Owner NANJING UNIV