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Device and method for efficiently preparing metal spherical ultrafine powder

A technology of ultrafine powder and metal, which is applied in the field of spherical microparticle preparation, can solve the problems of poor sphericity, poor spreadability and fluidity, and achieve the effects of uniform size, good fluidity and high sphericity

Active Publication Date: 2015-05-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the problems of poor sphericity, poor spreadability and fluidity in the preparation process of metal spherical powder for 3D printing proposed above, a device and method for efficiently preparing metal spherical ultrafine powder are provided

Method used

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  • Device and method for efficiently preparing metal spherical ultrafine powder
  • Device and method for efficiently preparing metal spherical ultrafine powder

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Experimental program
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Effect test

Embodiment 1

[0048] Specific implementation of batch preparation of Sn-0.3Ag-0.7Cu spherical powder:

[0049] Break the Sn-0.3Ag-0.7Cu raw material into small pieces, put them into the crucible 1 after ultrasonic vibration cleaning, and select the aperture size of the nozzle 13 according to the requirements, such as preparing 25μm-50μm particles, select the aperture size of 0.02mm-1.0mm, For example, to prepare 50μm-100μm particles, choose a pore size of 1.0mm-2.0mm; the amount of Sn-0.3Ag-0.7Cu raw materials should reach 1 / 2-3 / 4 of the crucible 1, such as figure 1 shown;

[0050] Use the mechanical pump 10 to pump the housing 12 and the crucible 1 to a low vacuum of 5 Pa, and then use the diffusion pump 11 to pump the housing 12 and the crucible 1 to a high vacuum of 0.001 Pa; The high-purity inert protective gas argon makes the pressure in the shell 12 and the crucible 1 reach 0.1 MPa;

[0051] Use the induction heater 2 to heat the crucible 1 at a heating temperature of 260°C to melt ...

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Abstract

The invention discloses a device for efficiently preparing metal spherical ultrafine powder. The device comprises a shell, a crucible and a powder collection area, wherein the crucible is arranged in the shell. The device is characterized in that a thermal couple is arranged inside the crucible; sensing heaters are arranged outside the crucible; the bottom of the crucible is provided with a nozzle with a small hole; a concentrator is arranged below the nozzle; the periphery of the concentrator is provided with sensing coils; the powder collection area comprises a collection disk arranged at the bottom of the shell and a rotary circular disk arranged above the collection disk. The invention further discloses a method for preparing metal spherical ultrafine powder. A technology for preparing fine particles by cutting capillary jet with electromagnetic force and a centrifugal atomizing method are combined, so that metal powder which has the advantages of narrow particle diameter distribution interval, high roundness, high fluidity, superior spreading property, uniform and controllable size and nonexistence of satellite droplets and meets the 3D printing use requirement can be prepared. The method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of spherical microparticles, in particular to a device and method for efficiently preparing metal spherical ultrafine powders by combining electromagnetic force cutting capillary jet preparation technology and centrifugal atomization method. Background technique [0002] With the continuous development and innovation of processing technology, spherical powder materials are widely used in electronic packaging, precision preparation, biomaterials, etc. With the development of 3D printing technology, spherical powder preparation technology has received special attention in this regard. 3D printing technology is different from traditional processing technology. It uses metal powder, polymer materials and other bondable materials as raw materials to prepare objects by layer-by-layer deposition. It has high production efficiency, less waste of raw materials, and can manufacture workpieces with comple...

Claims

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Application Information

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IPC IPC(8): B22F9/10
Inventor 董伟康世薇付一凡李颖盖如坤魏宇婷
Owner DALIAN UNIV OF TECH
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