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Nano-structure block magnesium material and preparation method thereof

A nanostructure, bulk material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as increasing the thermal diffusion time of hydrogenation/dehydrogenation reactions and reducing the heat transferability of materials

Active Publication Date: 2014-05-14
氢储(上海)能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while nanonization improves the hydrogen storage performance, it also reduces the thermal conductivity of the material and increases the thermal diffusion time of the hydrogenation / dehydrogenation reaction. Due to the extremely high surface activity of nanomaterials, they are easily oxidized or even spontaneously ignited. Storage and transportation conditions of hydrogen materials pose challenges

Method used

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  • Nano-structure block magnesium material and preparation method thereof
  • Nano-structure block magnesium material and preparation method thereof
  • Nano-structure block magnesium material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The high-purity magnesium used in this experiment was purchased commercially, with a purity of more than 99.9%. The magnesium block was cut into regular blocks with a length of 4cm × width 4cm × height 2cm with a grinding wheel cutter, and a sand mill was used to remove the oxide layer on the surface of the magnesium block. used as anode. The preparation of nanostructured bulk magnesium materials is mainly divided into two steps: (1) preparation of magnesium nanopowder by direct current arc method; (2) preparation of bulk magnesium materials by high pressure torsion method.

[0038] Step (1): A method for preparing magnesium nanopowder: a high-purity magnesium metal block is used as an anode, and a tungsten rod is used as a cathode and placed in a DC arc plasma device. When the equipment is evacuated to 5×10 -2Pa, filled with argon to 0.7atm, and then filled with 0.1atm hydrogen. Through cooling water, the water temperature is controlled at room temperature, and the w...

Embodiment 2

[0041] In this experiment, high-purity iron and high-purity magnesium are commercially purchased, and the purity reaches more than 99.9%. Similar to Example 1, the magnesium block and iron block are cut into regular blocks with a length of 4cm × width 4cm × height 2cm with a grinding wheel cutter, and The sand mill removes the oxide layer on the surface of the block, which is used as an anode. The experiment mainly includes three steps: (1) preparation of magnesium nanopowder; (2) preparation of iron nanopowder; (3) preparation of iron-containing bulk magnesium material. The preparation of the magnesium nanopowder is basically the same as in Example 1, and the specific operation can refer to the relevant part of Example 1, and the steps (2) and (3) will be mainly described below.

[0042] Step (2): A preparation method of iron nanopowder: a high-purity iron metal block is used as an anode, and a tungsten rod is used as a cathode and placed in a DC arc plasma device. When the ...

Embodiment 3

[0046] In this experiment, high-purity nickel and high-purity magnesium are commercially purchased, and the purity reaches more than 99.9%. Similar to Example 1, the magnesium block and the nickel block are cut into long 4cm * wide 4cm * high 2cm regular blocks with a grinding wheel cutter, and sand The mill removes the oxide layer on the surface of the block, which is used as an anode. The experiment mainly includes three steps: (1) preparation of magnesium nanopowder, (2) preparation of iron nanopowder; (3) preparation of nickel-containing bulk magnesium material. The preparation of the magnesium nanopowder is basically the same as in Example 1, and the specific operation can refer to the relevant part of Example 1, and the steps (2) and (3) will be mainly described below.

[0047] Step (2): A preparation method of nickel nanopowder: a high-purity nickel metal block is used as an anode, and a tungsten rod is used as a cathode and placed in a DC arc plasma device. When the e...

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Abstract

The invention discloses a block magnesium material which comprises nano-structure magnesium and at least one nano-structure transition metal. The weight of the transition metal accounts for less than 20% of the total weight of the block magnesium material. The invention further discloses a preparation method of the block magnesium material. The preparation method includes the steps: subjecting a metal block to melting, evaporating and cooling to form nanometer metal powder; pressing the nanometer metal block through high-pressure torsion to prepare a block material. The material has dual advantages of an ordinary block material and the nanometer material, good dynamic performance on hydrogen absorption and releasing and high block density and thermal conductivity and thermal efficiency are achieved, and the material is easy to store and transport and can be used as a hydrogen storage material high in capacity; the block magnesium material having the advantages of high density and high hardness can serve as the ideal material with the structure light in weight and high in strength.

Description

technical field [0001] The invention relates to a magnesium material, in particular to a nanostructure block magnesium material and a preparation method. Background technique [0002] The invention relates to a block magnesium material with a nanometer structure. The material has the advantages of high density and high hardness, is an ideal light-weight and high-strength structural material, and can also be used as a high-capacity hydrogen storage material. [0003] With the rapid development of the economy, people's demand for energy continues to increase. However, the reserves of fossil energy that people have relied on for a long time are declining. According to the research of British Petroleum (BP), according to the current mining speed, coal, oil and natural gas will be exhausted within 120 years. At the same time, the extensive use of fossil fuels has seriously polluted the environment. Phenomena such as acid rain, melting glaciers, high-temperature smog, and El Niño...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F3/20B82Y40/00B82Y30/00
Inventor 邹建新潘银成曾小勤龙胜丁文江
Owner 氢储(上海)能源科技有限公司
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