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Erbium-based amorphous composite magnetic cold storage material and its preparation method, cryogenic refrigerator

A cold storage material and composite magnetic technology, which is applied in the fields of low temperature physics and material science, can solve problems such as unsatisfactory effects, and achieve the effects of superior processing capacity, easy processing, and simple preparation methods

Active Publication Date: 2015-12-16
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scholars from various countries have conducted extensive explorations on the spheroidization processing of magnetic regenerator materials, but the results are not ideal

Method used

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  • Erbium-based amorphous composite magnetic cold storage material and its preparation method, cryogenic refrigerator
  • Erbium-based amorphous composite magnetic cold storage material and its preparation method, cryogenic refrigerator
  • Erbium-based amorphous composite magnetic cold storage material and its preparation method, cryogenic refrigerator

Examples

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preparation example Construction

[0036] In the technical solution of the present invention, the preparation method of the above-mentioned erbium-based amorphous composite magnetic cold storage material comprises the following steps:

[0037] 1) Proportioning of raw materials: elements Er, T, Al, and X according to (Er 0.75 T 0.25 ) a al b x c For batching, where 75≤a≤85, 15≤b≤25, 0≤c≤5, and a+b+c=100, element T is Ni or Co, element X is selected from Gd, Tb, Dy, Ho One or more of , Tm, Cu, Y, Ag;

[0038] Among them, the purity of all Er, Co, Ni, Al, Gd, Tb, Dy, Ho, Tm, Cu, Y, Ag elements is not less than 99.9wt%;

[0039] 2) Preparation of the master alloy: placing the components obtained in the aforementioned steps of batching in an electric arc furnace in an argon atmosphere adsorbed by titanium, melting (preferably more than 4 times) to mix them uniformly, and obtaining the master alloy ingot after cooling;

[0040] 3) Suction casting: using conventional metal mold casting method, re-melting the mas...

Embodiment 1

[0043] Embodiment 1, erbium-based amorphous alloy composite material (Er 0.75 Ni 0.25 ) 80 al 17 Gd 3 preparation of

[0044] After the four components of Er, Ni, Al and Gd with a raw material purity of more than 99.9wt% (weight percent) are prepared in a molar ratio of 60:20:17:3, in an electric arc furnace with an argon atmosphere adsorbed by titanium Mix and smelt 5 times to make it evenly mixed, and obtain the master alloy ingot of Er-Ni-A1-Gd quaternary alloy after cooling; then use the conventional metal mold casting method to remelt the ingot, and use the electric arc furnace The suction casting device, the master alloy melt is sucked into the water-cooled copper mold, and the composition can be obtained as (Er 0.75 Ni 0.25 ) 80 al 17 Gd 3 , An erbium-based amorphous composite magnetic regenerator material with a diameter of 1 mm.

[0045] figure 1 It is the erbium-based amorphous composite magnetic cold storage material (Er 0.75 Ni 0.25 ) 80 al 17 Gd 3 ...

Embodiment 2～4

[0050] Embodiment 2~4, erbium-based amorphous composite magnetic cold storage material (Er 0.75 Ni 0.25 ) 80 al 20-x Gd x Preparation of (x=0,1,2)

[0051] Similar to the preparation method of Example 1, an erbium-based amorphous composite magnetic cold storage material (Er 0.75 Ni 0.25 ) 80 al 20 , (Er 0.75 Ni 0.25 ) 80 al 19 Gd 1 and (Er 0.75 Ni 0.25 ) 80 al 18 Gd 2 .

[0052] Figure 5 is the X-ray diffraction pattern of this series of erbium-based amorphous composite magnetic regenerator materials, it can be seen that the alloy (Er 0.75 Ni 0.25 ) 80 al 20 , (Er 0.75 Ni 0.25 ) 80 al 19 Gd 1 and (Er 0.75 Ni 0.25 ) 80 al 18 Gd 2 with (Er 0.75 Ni 0.25 ) 80 al 17 Gd 3 The structure of the same amorphous alloy composite.

[0053] Figure 6 Shown is (Er prepared by embodiment 2 0.75 Ni 0.25 ) 80 al 20 and (Er prepared in Example 1 0.75 Ni 0.25 ) 80 al 17 Gd 3 From the curve of magnetization versus temperature, it can be seen that th...

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Abstract

The invention relates to an erbium-based amorphous composite magnetic cold storage material. The alloy adopts erbium as main components, is prepared on the basis of components of Er3Ni and Er3Co, and can be formulated as (Er0.75T0.25)aAlbXc. The invention also relates to a preparation method of the erbium-based amorphous composite magnetic cold storage material, and a cryogenic refrigerator containing the erbium-based amorphous composite magnetic cold storage material. The erbium-based amorphous composite magnetic cold storage material has the characteristics that the preparation method is simple, the heat stability is good, the oxidation resistance is strong, excellent processing capacity of a supercooled liquid region, the position and the width of a specific heat peak value can be adjusted, and the like, so that the erbium-based amorphous composite magnetic cold storage material has potential application prospect when being used as a low-temperature magnetic cold storage material.

Description

technical field [0001] The invention relates to the fields of low-temperature physics and material science, in particular to an erbium-based amorphous composite magnetic regenerator material and a preparation method thereof, and a cryogenic refrigerator containing the erbium-based amorphous composite magnetic regenerator material. Background technique [0002] As an important branch of cryogenic technology, cryogenic refrigeration technology has been widely used in meteorology, military, aerospace, cryogenic electronics, cryogenic medicine and many other fields. High-efficiency cryogenic refrigerators have broad application prospects in the industrial field and have received extensive attention. At low temperatures below 15K, the cooling efficiency of a cryogenic refrigerator mainly depends on the efficiency of its cold storage. The cold accumulator of a cryogenic refrigerator is an efficient energy storage device. The cold storage material with high heat capacity stores an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00C09K5/14H01F1/01
Inventor 霍军涛赵德乾丁大伟白海洋汪卫华
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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