A kind of gd-ni-al based amorphous nanocrystalline composite material and preparation method thereof

An amorphous nanocrystalline and composite material technology is applied in the field of Gd-Ni-Al-based amorphous nanocrystalline composite materials and their preparation, which can solve the problems of limiting the refrigeration application of magnetic refrigeration working medium materials, and achieve the expansion of refrigeration application range, The effect of large cooling capacity
CN105970118BInactive Publication Date: 2018-01-23NINGBO UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO UNIVERSITY OF TECHNOLOGY
Publication Date
2018-01-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a Gd-Ni-Al-based amorphous and nanocrystalline composite material. The molecular formula of the Gd-Ni-Al-based amorphous and nanocrystalline composite material is GdaNibAlc, wherein a, b and c represent atom contents of corresponding elements, 80<=a<=90, 5.8<=b<=11.6, 4.2<=c<=8.4, and the equation that a+b+c=100 is satisfied. The Gd-Ni-Al-based amorphous and nanocrystalline composite material is of an amorphous / nanocrystalline complex phase structure and has two refrigeration temperature zones and one or two magnetic entropy change platforms, the high-temperature magnetic order temperature is 270 K or above, and the magnetic entropy change under a 5T magnetic field can reach 6.7 J / kg / K. Because magnetic transition temperature intervals are wide, the refrigeration capacity reaches up to 640 J / kg or above, and the Gd-Ni-Al-based amorphous and nanocrystalline composite material is a good magnetic refrigeration material and can be used as a magnetic refrigeration working material in the two intervals of the two refrigeration temperature zones.
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Description

technical field

[0001] The invention relates to the technical field of rare earth-based amorphous and nanocrystalline composite materials, in particular to a Gd-Ni-Al-based amorphous and nanocrystalline composite material with a magnetic entropy change platform and dual cooling and temperature zones and a preparation method thereof. Background technique

[0002] The traditional gas compression refrigeration technology not only has the greenhouse effect but also may destroy the ozone layer. Compared with it, the magnetic refrigeration technology has the advantages of environmental protection, high efficiency and energy saving, small size, long life and safety and reliability. Therefore, it is necessary to look for high-efficiency magnetic refrigeration materials become a matter of concern to people.

[0003] Magnetic refrigeration relies on the magnetocaloric effect to achieve the cooling effect, so the magnetocaloric effect is the basis for the realization of magnetic refrig...

Claims

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