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Non-crystal rare-earht-Mg based hydrogen bearing alloy and its preparing process

A magnesium-based hydrogen storage alloy and a technology for hydrogen storage alloys are applied in the field of magnesium-based alloys to achieve the effects of saving energy consumption, high efficiency and simple structure

Inactive Publication Date: 2003-02-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature [7] reported that a magnesium-based alloy that can absorb hydrogen at room temperature is MgH 2 -5wt%V, the alloy is also prepared by mechanical ball milling method, and first let pure Mg absorb hydrogen to become MgH 2 , and then synthesized with pure vanadium ball mill, its hydrogen absorption at room temperature is 2.0wt% by weight, although the alloy can absorb hydrogen at room temperature, its hydrogen absorption is only 26% of the saturated hydrogen absorption of pure magnesium at high temperature %

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011]A kind of amorphous rare earth-magnesium hydrogen storage alloy, its general chemical formula is Re 2-x m x Mg 17-y N y , Re in the formula is La, x=0, y=1, N is Ni, then the chemical formula is La 2 Mg 16 Ni ternary alloy, calculate the weight ratio of La, Mg and Ni according to the chemical formula, smelt in a vacuum induction furnace protected by argon or a crucible furnace protected by slagging, and cast into ingots after completion. Among the raw materials, La is metal lanthanum with a purity of ≥98% (percentage by weight, the same below), Mg is metal magnesium with a purity of ≥99%, and Ni is electrolytic nickel with a purity of ≥99.9%; the alloy ingot is broken into fine powder in air, The particle size of the fine powder is not more than 200 mesh. Put the fine powder into the ball mill tank, put the ball into the ball at a ratio of 30:1, add chemically pure tetrahydrofuran solvent until the alloy powder and the ball are immersed, and then carry out ball milli...

Embodiment 2

[0013] Preferably the chemical formula in the alloy of the present invention is La 1.8 Ca 0.2 Mg 16 Ni (that is, in the general formula, Re is La, x=0.2, M is Ca, y=1, and N is Ni) calculates the weight ratio of La, Ca, Mg, and Ni according to this chemical formula, and the purity of Ca in the raw material is ≥99%. , remaining with embodiment 1. The crystalline alloy solvent is the same as in Example 1. Ball milling process parameters, including alloy particle size, ball-to-material ratio, organic solvent, rotating speed, and operating cycle are the same as in Example 1. La 1.8 Ca 0.2 Mg 16 After 15 hours of intermittent ball milling, the Ni crystalline alloy turns into fine amorphous. Vacuum the ball-milled material to remove THF to obtain amorphous La 1.8 Ca 0.2 Mg 16 Ni alloy, its hydrogen absorption capacity measured at room temperature and 3.0 MPa hydrogen pressure within 2 hours is 4.2%.

[0014] Literature [1]: J.Alloys and Compounds, 1999, Vol.282, pp286-290...

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Abstract

A non-crystal rare earth-Mg-base hydrogen bearing alloy has a chemical formula: Re2-xMxMg17-yNy, where x=0-1, y=0-4, Re is chosen from La, Ce, Re, Nd, etc, M is chosen from Ca, Ti, V and Zr, and N is chosen from Ni, Co Fe, Mn and Cu. It is prepared through smelting its crystal alloy, pulverizing, mixing with aromatic organic solvent, ball grinding and removing solvent. Its advantages are high hydrogen bearing capacity etc.

Description

technical field [0001] The invention relates to a magnesium-based alloy with magnesium as the main component and rare earth metal as the secondary component, and sub-refers to changing the structure of the alloy by cold working. Background technique [0002] Hydrogen energy is a renewable ideal clean energy. At present, fuel cells using hydrogen as fuel have been gradually popularized and applied in fields such as automobiles, mopeds, motorcycles, mobile phones, communications, computers, cameras, power tools, and military equipment. The supply of hydrogen sources is hydrogen storage , Transportation problems have become a top priority. As a hydrogen energy storage and transportation carrier, hydrogen storage materials are safer and more economical than current technologies such as high-pressure containers, liquid hydrogen and methanol, and are considered to be one of the candidate materials for hydrogen fuel tanks for hydrogen fuel cells and hydrogen engines. So far, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C45/00
Inventor 陈长聘陈立新王溦陈昀王启东
Owner ZHEJIANG UNIV
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