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Hollow powder and its preparation method

A powder and hollow technology, which is applied in the field of hollow powder and its preparation, can solve the problems of reduced surface density, complicated process, and low density.

Active Publication Date: 2022-06-03
深圳航天科创实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nickel powder prepared by this method has high purity, low density, and reduced surface density, but the process is complicated and the reaction process is not easy to control

Method used

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  • Hollow powder and its preparation method
  • Hollow powder and its preparation method

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Experimental program
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preparation example Construction

[0038] It can be understood that the electrode can also be connected to the cathode of the power source, and the workpiece can be connected to the anode of the power source. At this point, the workpiece has

[0039] Preferably, the electrode and the workpiece are of the same material. Since the arc plasma is generated in the gap between the electrode and the workpiece, the

[0042] The fluid medium is a water-based medium. In one embodiment, the fluid medium is distilled water, pure water or deionized water

[0043] Specifically, the molding agent is polystyrene or polyurethane. For example, the polystyrene can be expanded polystyrene. In its

[0044] Specifically, the binder is polyvinyl alcohol, polyvinyl butyral or polyvinyl chloride. In one of the embodiments,

[0050] The hollow powder rate of the hollow powder can be adjusted by controlling the energy of the arc. The energy of the arc becomes larger, the hollow powder

[0051] In one embodiment, the discharge current i...

Embodiment 1

[0075] The SEM image of the spherical hollow nickel powder of the present embodiment is shown in Figure 2. As can be seen from Figure 2, the powder surface and inner

Embodiment 2

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Abstract

The invention relates to a hollow powder and a preparation method thereof. The preparation method of the above-mentioned hollow powder includes the following steps: placing the electrode and the workpiece on the two poles of the power supply respectively, introducing a fluid medium in the discharge gap, and the fluid medium contains a molding agent and a binder; controlling the process parameters in the arc micro-explosion technology, so that The molten workpiece is nucleated and grown with the forming agent and / or binder as the nucleus to obtain primary particles; the forming agent and binder in the primary particles are removed to prepare hollow powder. The above method for preparing the hollow powder has a simple process, is easy to control, and the prepared hollow metal powder has high purity.

Description

Hollow powder and preparation method thereof technical field The present invention relates to the preparation field of hollow powder, particularly relate to a kind of hollow powder and preparation method thereof. Background technique [0002] The hollow powder exhibits excellent properties in chemistry, mechanics, optics, electricity and magnetism, etc. It is expected to be widely used in military and civil fields such as chemical industry, electronics, metallurgy, aviation, medicine and so on. [0003] At present, the preparation method of hollow powder mainly includes atomization method, displacement reaction method and template method. Atomization has tools It has the advantages of mature and stable technology and low cost, but a large number of broken hollow particles will appear during the preparation process, and it is difficult to control reaction process. The displacement reaction method can prepare hollow powder with small particle size, smooth surface and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14B22F1/0655
CPCB22F9/14B22F1/0655Y02E60/10
Inventor 刘国盛刘春利徐辉姚青周振宇
Owner 深圳航天科创实业有限公司