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Method for preparing metallic Mg nano granular material

A nanoparticle and metal technology, applied in the field of nanomaterial preparation

Inactive Publication Date: 2009-01-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the preparation of Mg nanoparticles by arc discharge method in liquid nitrogen medium under non-vacuum conditions.

Method used

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  • Method for preparing metallic Mg nano granular material
  • Method for preparing metallic Mg nano granular material
  • Method for preparing metallic Mg nano granular material

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Experimental program
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Embodiment Construction

[0025] The preparation device that the present invention adopts sees figure 1 , including DC output power supply, arc discharge device, container, etc. In the arc discharge device, the anode is supplied through the stepping motor, and the stepping motor is controlled by the stepping motor controller, and the control circuit is used to monitor the feeding speed of the cathode and anode , so that the controller can adjust the feed speed in time. A self-feedback system is used to control the speed at which the stepper motor automatically supplies the anode; the self-feedback system includes a control circuit and a stepper motor controller; the cathode and the anode are respectively fixed by a holder, and the detection signal input terminals of the control circuit are respectively connected to the cathode and the anode. For the anode holder, the control signal input end of the stepper motor controller is connected to the output end of the control circuit, and the control signal ou...

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Abstract

The invention discloses a preparation method for magnesium nano-particles, which belongs to the technical field of nano-material preparation. The invention is characterized in that the MgO nano-particles are prepared by adopting the method of arc discharge in liquid nitrogen medium, consumable pure magnesium anode under the non-vacuum condition, wherein, an inner hole is opened at the end face of a cathode, and an anode is arranged in the inner hole at the end part of the cathode. Under the action of air flow, air is involved in a reaction zone of arc discharge, oxygen atoms are supplied for the generation of MgO, and the nano-particles of the MgO are synthesized by the arc discharge. The preparation method has the advantages of simple equipment and controllable process parameters. The industrial pure magnesium stick which is taken as raw material in preparation is abundant and the cost of the raw material is low. Mg nano-particles with the shapes such as non-regular flake, hexagonal flake, hexagonal lantern, nearly hexagonal structure or nearly spherical shape can be prepared, and the particles have no other pollutions.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation. In particular, it relates to a nano metal material, which is a nano material with high surface activity, catalytic performance and hydrogen storage performance. Background technique [0002] Nanomaterials have a wide range of potential applications due to their unique small size effect, surface characteristics and various excellent physical and chemical properties. Mg nanoparticles have high surface activity, so they are excellent reducing agents, catalyst materials, and hydrogen storage materials with excellent performance, so they have broad application prospects. At the same time, magnesium resources are abundant and the cost is low, which makes Mg nanoparticle materials have significant practical value. The morphology of nano-magnesium particles will have a significant impact on its surface adsorption properties, so it is of great significance to develop a method that...

Claims

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Application Information

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IPC IPC(8): B22F9/14
Inventor 姚可夫范肖凌
Owner TSINGHUA UNIV
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