Non-crystal rare-earth and Mg base 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 light weight, simple structure and simple preparation process

Inactive Publication Date: 2004-11-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature [7] reported that a magnesium-based alloy that can absorb hydrogen at room temperature is MgH 2 -5% 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 by ball milling with pure vanadium, its hydrogen absorption at room temperature is 2.0%, 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 1-x m x Mg 12-y N y , Re in the formula is Ce, x=0, y=1, N is Ni, then the chemical formula is CeMg 11 Ni ternary alloy, according to the chemical formula to calculate the weight ratio of Ce, Mg and Ni, smelting in a vacuum induction furnace protected by argon, and pouring into ingots after completion. Among the raw materials, Ce 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 the air, and the fine powder particle size If the fine powder is less than 75μm, put the fine powder into the ball mill tank, put the ball into the ball at a ratio of 30:1 and add chemically pure tetrahydrofuran solvent until the alloy powder and the ball are submerged, and then carry out ball milling. The spindle speed of ...

Embodiment 2

[0013] Preferred formula Re 1-x m x Mg 12-y N y Re in is Ce; x=0.2, M is Ca; y=1; N is Ni, promptly constitutes chemical formula to be Ce 0.8 Ca 0.2 Mg 11 The quaternary alloy of Ni, the weight ratio of Ce, Ca, Mg and Ni is calculated according to the chemical formula, smelted in a vacuum induction furnace protected by argon, and cast into ingots after completion. Ca in the raw material is metallic calcium with a purity of 99%. The purity of other raw materials is the same as in Example 1. The process of ball milling with an organic solvent and the solvent are the same as in Example 1. After 10 hours of intermittent ball milling, the alloy turns into amorphous. Amorphous Ce as prepared 0.8 Ca 0.2 Mg 11 The weight percent of hydrogen absorbed by the Ni hydrogen storage alloy at room temperature and 3.0 MPa within 2 hours was measured to be 4.5%.

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

[0015] Literature [2]: J. Alloys and Compounds, ...

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Abstract

A non-crystal rare earth-Mg-bse alloy for bearing hydrogen has a chemical formula: Re1-xMxMg12-yNy, where x=0-0.5, y=0-3, Re is chosen from La, Ce, Pr, etc. M is chosen from Ca, Ti, V and Zr, and N is chosen from Ni, Co, Fe, etc. It is prepared through smelting its cystal alloy, pulverizing, mixing with aromatic organic solvent, ball grinding and removing solvent. Its advantages are high hydrogen-bearing power etc.

Description

technical field [0001] The present invention relates to a magnesium-based alloy with magnesium as the main component and rare earth metal as the secondary component, and involves 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 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 hydrogen storage m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C45/00
Inventor 陈长聘陈立新王溦陈昀王启东
Owner ZHEJIANG UNIV
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