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Method for preparing nano-porous magnesium through vapor deposition method

A vapor deposition method and nanoporous technology, applied in nanotechnology, ion implantation plating, coating, etc., can solve the problems of honeycomb nanoporous magnesium ligament thickness, unfavorable hydrogen storage performance, and large hydrogen diffusion path, etc., to achieve the preparation The effect of short time, favorable hydrogen storage performance, and high yield

Active Publication Date: 2017-06-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The honeycomb nanoporous magnesium ligament prepared by this patent is thicker, with less pore size and lower porosity, so its hydrogen diffusion path is larger and its specific surface area is smaller, which is unfavorable for its hydrogen storage performance.
The preparation conditions of this patent require a molecular pump system to make the deposition chamber reach a high vacuum, and the conditions are relatively strict

Method used

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  • Method for preparing nano-porous magnesium through vapor deposition method
  • Method for preparing nano-porous magnesium through vapor deposition method
  • Method for preparing nano-porous magnesium through vapor deposition method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as image 3 As shown, first, 0.5-1.0 g of magnesium powder 9 was placed at the bottom of the stainless steel deposition chamber 5, and the stainless steel mesh substrate 6 was inserted into the stainless steel deposition chamber 5 so that the vertical distance from the magnesium powder 9 was about 120 mm. Put the stainless steel deposition chamber 5 into the quartz tube 4 vertically. Next, put the quartz tube 4 vertically into the heating furnace 7, and adjust the position of the quartz tube 4 so that it is located in the heating zone of the tube furnace. Insert the ventilation pipe so that it is inside the stainless steel deposition chamber 5, above the stainless steel mesh substrate 6, but not in contact with the stainless steel mesh substrate 6. Connect the quartz tube 4 and the mechanical pump 3 with a bellows with a diameter of 25 mm and a length of 1.5 m. The 3rd, open mechanical pump 3, the vacuum degree of quartz tube 4 is pumped to 10 -1 Pa, and then pa...

Embodiment 2

[0035] Such as image 3 As shown, first, 0.5-1.0 g of magnesium powder 9 was placed at the bottom of the stainless steel deposition chamber 5, and the stainless steel mesh substrate 6 was inserted into the stainless steel deposition chamber 5 so that the vertical distance from the magnesium powder 9 was about 120 mm. Put the stainless steel deposition chamber 5 into the quartz tube 4 vertically. Next, put the quartz tube 4 vertically into the heating furnace 7, and adjust the position of the quartz tube 4 so that it is located in the heating zone of the tube furnace. Connect the quartz tube to the mechanical pump with a bellows with a diameter of 25 mm and a length of 1.5 m. During this process, ensure that the ventilation pipe is inside the stainless steel deposition chamber 5 and above the stainless steel mesh substrate 6 , but does not touch the stainless steel mesh substrate 6 . The 3rd, open mechanical pump 3, the vacuum degree of quartz tube 4 is pumped to 10 -1 Pa, a...

Embodiment 3

[0037] Such as image 3 As shown, first, 0.5-1.0 g of magnesium powder 9 was placed at the bottom of the stainless steel deposition chamber 5, and the stainless steel mesh substrate 6 was inserted into the stainless steel deposition chamber 5 so that the vertical distance from the magnesium powder 9 was about 120 mm. Put the stainless steel deposition chamber 5 into the quartz tube 4 vertically. Next, put the quartz tube 4 vertically into the heating furnace 7, and adjust the position of the quartz tube 4 so that it is located in the heating zone of the tube furnace. Insert the ventilation pipe so that it is inside the stainless steel deposition chamber 5, above the stainless steel mesh substrate 6, but not in contact with the stainless steel mesh substrate 6. Connect the quartz tube 4 and the mechanical pump 3 with a bellows with a diameter of 25 mm and a length of 1.5 m. The 3rd, open mechanical pump 3, the quartz tube vacuum degree is pumped to 10 -1 Pa, and then into th...

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Abstract

The invention provides a method for preparing nano-porous magnesium through a vapor deposition method, and belongs to the technical field of metal nanomaterial preparation. According to the method, industrial magnesium powder is used as a raw material and is heated to a certain temperature for evaporation under the action of low vacuum and auxiliary gas, then the magnesium powder is deposited on a stainless steel wire substrate at a low temperature, and finally the feathered nano-porous magnesium is obtained. The prepared feathered nano-porous magnesium is composed of a feathered nano structure and multi-level pores. The pores comprise micron holes with the pore diameters being 3.3-9.4 microns and nano pores with the pore diameters being 385nm. The method for preparing the nano-porous magnesium through the vapor deposition method has the advantages of being simple in process, short in preparation time, low in cost, high in yield and the like.

Description

technical field [0001] The invention relates to the technical field of metal nanomaterial preparation, in particular to a method for preparing nanoporous magnesium by vapor deposition. Background technique [0002] Magnesium has great potential application value in the field of hydrogen storage due to its extremely high reversible hydrogen storage capacity (7.6 wt.%), low density, abundant reserves, and low price. However, its extremely poor hydrogen absorption and desorption speed and high hydrogen absorption and desorption temperature have seriously hindered its practical application. And nanonization is an excellent method to improve the hydrogen storage performance of magnesium. Compared with bulk magnesium, nanomagnesium retains its high reversible hydrogen storage capacity, and at the same time has a greatly improved hydrogen absorption and desorption rate (ZALUSKA A, ZALUSKI L, STRÖM–OLSEN J O. Nanocrystalline magnesium for hydrogen storage[J]. Journal of Alloys and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/24C23C14/16B82Y40/00
CPCB82Y40/00C23C14/16C23C14/24
Inventor 宋西平王涵刘敬茹张蓓
Owner UNIV OF SCI & TECH BEIJING
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