A kind of magnesium-based hydrogen storage alloy block and preparation method thereof

A technology of magnesium-based hydrogen storage alloy and magnesium block, which is applied in the direction of metal extrusion control equipment, metal processing equipment, manufacturing tools, etc., can solve the problem of unsatisfactory hydrogen absorption performance, and achieve lower temperature and high hydrogen absorption capacity , Reduce the effect of hydrogen charging and discharging time

Active Publication Date: 2022-07-15
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But at present, magnesium-based hydrogen storage materials mainly exist in the form of powder, and the hydrogen absorption performance of bulk magnesium-based hydrogen storage materials under short-term and low-pressure conditions is not ideal.

Method used

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Comparison scheme
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preparation example Construction

[0028] The present application proposes a method for preparing a magnesium-based hydrogen storage alloy block, comprising the following steps: preparing the magnesium block, the magnesium-nickel master alloy and the magnesium rare earth master alloy in a mass ratio of 50-90:10 of magnesium element, nickel element and rare earth element. -Smelting and pouring at 20:1-10 to obtain alloy ingots; then hot extrusion of alloy ingots into alloy rods and processing into alloy electrodes; then alloy electrodes are atomized and powdered to obtain magnesium-nickel-rare earth hydrogen storage Alloy powder, magnesium-nickel-rare earth hydrogen storage alloy powder is pressed into shape.

[0029] By adding a magnesium-nickel master alloy to the raw material, the nickel contained in the raw material can form a solid solution with the magnesium in the raw material. The bonding force between nickel and hydrogen is weak, the formation enthalpy of hydride is low, and nickel has a catalytic effect...

Embodiment 1

[0067] The present embodiment provides a magnesium-based hydrogen storage alloy block, which is prepared by the following method:

[0068] According to the composition of Mg:Ni:Y mass ratio of 80:10:10, with magnesium block, magnesium-nickel master alloy and magnesium rare-earth master alloy, smelted in a pit resistance furnace at 720 ℃ and 500r / min for 2h , poured at 690°C for 20min. The above smelting and pouring processes are the same as those of SF 6 and CO 2 carried out under the protection of the mixed gas.

[0069] The cast alloy ingot is hot-extruded at 450°C, and the extrusion deformation ratio is 100:1 to obtain an alloy rod. Before extrusion, the die was preheated at a preheating temperature of 200°C, and the extrusion cylinder was preheated at a preheat temperature of 250°C.

[0070] The obtained alloy rod is processed into an alloy electrode, and the electrode is placed in a plasma rotating electrode powder-making equipment for atomization and powder-making. T...

Embodiment 2

[0074] The present embodiment provides a magnesium-based hydrogen storage alloy block, which is prepared by the following method:

[0075] According to the composition of Mg:Ni:Y mass ratio of 80:15:5, with magnesium ingot, magnesium-nickel master alloy and magnesium rare-earth master alloy, smelted in a pit resistance furnace at 710 ℃ and 200r / min for 3h , poured at 680°C for 5min. The above smelting and pouring processes are the same as those of SF 6 and CO 2 carried out under the protection of the mixed gas.

[0076] The cast alloy ingot is hot-extruded at 430°C, and the extrusion deformation ratio is 200:1 to obtain an alloy rod. Before extrusion, the die was preheated at a preheating temperature of 100°C, and the extrusion cylinder was preheated at a preheat temperature of 100°C.

[0077] The obtained alloy rod is processed into alloy electrodes according to the required size, and the electrodes are put into the plasma rotating electrode powder-making equipment for at...

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Abstract

The invention discloses a magnesium-based hydrogen storage alloy block and a preparation method thereof, belonging to the technical field of magnesium-based hydrogen storage materials. The method includes the following steps: smelting and pouring the magnesium block, the magnesium-nickel master alloy and the magnesium rare earth master alloy according to the mass ratio of magnesium element, nickel element and rare earth element as 50-90:10-20:1-10, to obtain an alloy ingots; then hot extrusion of alloy ingots into alloy rods and processing into alloy electrodes; then the alloy electrodes are atomized and powdered to obtain magnesium-nickel-rare earth hydrogen storage alloy powder, and magnesium-nickel-rare earth hydrogen storage alloy powder is obtained Pressing. The method is simple, easy to operate, and suitable for batch preparation of magnesium-based hydrogen storage alloy blocks. The magnesium-based hydrogen storage alloy bulk thus prepared can achieve a higher hydrogen absorption capacity in a shorter time and under a lower pressure, and can be recycled up to 1500-2000 times.

Description

technical field [0001] The invention relates to the technical field of magnesium-based hydrogen storage materials, in particular to a magnesium-based hydrogen storage alloy block and a preparation method thereof. Background technique [0002] Magnesium-based hydrogen storage material is a medium-temperature hydrogen storage material with high safety, easy storage and transportation, and its characteristics of low relative density and low cost are considered to be the most valuable hydrogen storage materials for application and development. [0003] However, at present, magnesium-based hydrogen storage materials mainly exist in the form of powder, and the hydrogen absorption properties of bulk magnesium-based hydrogen storage materials under short-term and low-pressure conditions are not ideal. [0004] In view of this, the present invention is proposed. SUMMARY OF THE INVENTION [0005] One of the objectives of the present invention is to provide a method for preparing a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C23/06C22C1/03B22F3/02B22F9/14B21C31/00
CPCC22C23/00C22C23/06C22C1/03B22F9/14B22F3/02B21C31/00C22C2202/04Y02E60/32
Inventor 韩胜利郑开宏张玉桧徐静
Owner GUANGDONG INST OF NEW MATERIALS
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