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Method for preparing metallic hollow microsphere powder

The technology of hollow microsphere powder and hollow microsphere is applied in the field of material processing, which can solve the problems of difficult control and complicated preparation process, and achieve the effects of simple process, few processing steps, and simple structure phase composition.

Inactive Publication Date: 2009-10-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of metal hollow microsphere powder, in order to solve the problems existing in the prior art, such as the need for reaction templates, complex preparation process and relatively difficult control, etc. Mesoporous metal hollow microspheres with closed spherical shells and micron-scale diameters

Method used

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  • Method for preparing metallic hollow microsphere powder
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Examples

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preparation example Construction

[0018] The preparation method of metal hollow microspheres of the present invention is to utilize the above-mentioned forming device to implement according to the following steps:

[0019] Step 1, put the high-purity metal weighed according to the ratio of the master alloy into the crucible 5, open the communication valve 4, start the vacuum pump 17, and evacuate the large vacuum chamber 2 and the small vacuum chamber 7 to 10 2 ~10 -2 Close vacuum pump 17 after Pa, open argon valve 15 and pressure regulating valve 8, make the argon in the argon tank 13 enter mixing chamber 9, small vacuum chamber 7 and large vacuum chamber 2 successively, then close argon valve 15; After repeated vacuuming-refilling with argon for 3 to 5 times, then close the argon valve 15 and the pressure regulating valve 8 in turn, and then vacuumize again to make the vacuum degree in the large vacuum chamber 2 and the small vacuum chamber 7 reach 10 2 ~10 -2 Pa;

[0020] Step 2, energizing the high-freq...

Embodiment 1

[0026] 92% high-purity Ni (99.99%) and 8% high-purity Pb ​​(99.99%) are used to melt the master alloy. The size of the quartz crucible is Φ16mm×150mm. There is a nozzle of Φ0.8mm at the bottom of the crucible. The ball forming device is implemented according to the following steps:

[0027] Step 1, put the high-purity metal weighed according to the ratio of the master alloy into the crucible 5, open the communication valve 4, start the vacuum pump 17, and evacuate the large vacuum chamber 2 and the small vacuum chamber 7 to 10 2 Close vacuum pump 17 after Pa, open argon valve 15 and pressure regulating valve 8, make the argon in the argon tank 13 enter mixing chamber 9, small vacuum chamber 7 and large vacuum chamber 2 successively, then close argon valve 15; After repeated vacuuming-refilling with argon for 3 to 5 times, then close the argon valve 15 and the pressure regulating valve 8 in turn, and then vacuumize again to make the vacuum degree in the large vacuum chamber 2 a...

Embodiment 2

[0032] Embodiment 2: According to the steps of embodiment 1, control the following parameters to implement:

[0033] Select 90% high-purity Cu (99.99%) and 10% high-purity Pb ​​(99.99%) to melt the master alloy, evacuate the large vacuum chamber 2 and the small vacuum chamber to 10Pa, and the air pressure indicated by the barometer 6 reaches 13×10 3 At Pa, the rotational speed of the copper roller 14 is controlled to be 30 m / s. The hollow microspheres produced in Example 2 have a rounded shape, a pore diameter of about 40 microns, and a ratio of inner and outer diameters of about 0.66. The spherical shell is closed without mesopores, and the solidified structure of the spherical shell is fine and uniform and has the characteristics of rapid solidification.

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Abstract

The invention discloses a method for preparing metallic hollow microsphere powder. In the method, a molding device is used for implementing according to the steps of vacuum-pumping, heating and smelting, active aerification, hollow spheroidization and the like. The molding device comprises a large vacuum chamber communicated with a deflation valve and a vacuum pump, the large vacuum chamber is internally provided with a copper roller and a high frequency induction coil, the high frequency induction coil is internally provided with a crucible, a lower end nozzle is aligned with the face of the copper roller, the large vacuum chamber is connected with a small vacuum chamber, the opening of the crucible is communicated with the small vacuum chamber, and an additional passage is arranged between the large vacuum chamber and the small vacuum chamber; the small vacuum chamber is communicated with a mixing chamber, and the mixing chamber is respectively communicated with a hydrogen tank and an argon tank. In the method of the invention, the alloy melt is treated by active aerification, and the melt containing gas is treated by sharp quenching for fast solidification to obtain metallic hollow microsphere powder which is of intact sphere shape and contains no mesoporous, and the sphere shell solidified tissue has the feature of fast solidification; the method is simple in process, convenient in operation and low in cost.

Description

technical field [0001] The invention belongs to the technical field of material processing, and relates to a preparation method of metal hollow microsphere powder. Background technique [0002] Compared with solid microspheres of corresponding scale, hollow microspheres have the characteristics of light weight, heat insulation and microwave absorption. Hollow microspheres with a certain scale can be used not only as functional materials such as drug delivery, catalysis, sterilization, sensors, heat insulation (sound) and electromagnetic shielding, but also as structural materials for moving devices such as automobiles, ships and airplanes. Its applications cover national defense, medicine, civil and other fields, and it is a high-tech product that governments of all countries are competing to develop. Due to the above-mentioned attractive application potential, research on hollow microspheres has always been a hot spot of concern. [0003] At present, there are more resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08
Inventor 徐锦锋翟秋亚范于芳
Owner XIAN UNIV OF TECH
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