Preparation device and method for flaky powder

A flake powder and preparation device technology, which is applied in the field of flake powder preparation devices, can solve problems such as difficult preparation of alloy and compound powder, difficulty in large-scale preparation, complex procedures, etc., and achieve simple structure, no pollution in operation, and low energy consumption. low effect

Inactive Publication Date: 2016-08-03
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can be used to prepare various flake powders such as flake nickel powder, iron powder, manganese powder, etc., and the method is simple, and the size and thickness are easy to control. However, this method is only suitable for preparing single-quality flake metal powder, and it is difficult to prepare alloys and Compound powder, low yield, difficult to prepare on a large scale
The invention patent with the application number 201210411942.X uses the electrochemical reaction method to prepare flake metal powders such as zinc powder, copper powder and iron powder. The preparation process is safe and reliable, and the product quality is good. Compound powder, the problem that it is difficult to prepare on a large scale

Method used

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  • Preparation device and method for flaky powder
  • Preparation device and method for flaky powder
  • Preparation device and method for flaky powder

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Experimental program
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Effect test

preparation example Construction

[0051] The preparation device of the present invention has high cooling efficiency, so the preparation device of the present invention can be used to prepare flake metal or alloy powder, flake amorphous, quasicrystal and microcrystalline powder. Through the adjustment of parameters such as gas injection pressure and rotating disk speed, flake metal powder with a thickness of 1-3 μm, an aspect ratio of 50-300, and uniform particle size distribution can be prepared.

[0052] Correspondingly, the present invention also provides a preparation method of flake powder, the preparation method uses the above-mentioned preparation device, which includes the following steps:

[0053] S100: melting the raw material in the melting device 100 to obtain a molten liquid;

[0054] S200: The molten liquid is sprayed out through the nozzle 110 under the action of pressure and then falls under the action of gravity, and interacts with the atomizing gas of the gas atomization device 200 during the...

Embodiment 1

[0062] Flake metal powder of Fe-Si-Al was prepared.

[0063] The preparation steps are as follows:

[0064] S100: melting the Fe-Si-Al alloy raw material in a melting device to obtain a molten liquid; wherein the heating temperature in the melting and holding furnace is 150°C for superheating the melt, melting in a nitrogen protective atmosphere, and the diameter of the nozzle of the crucible is 2mm;

[0065] S200: After the molten liquid is ejected from the nozzle, it interacts with the atomized gas of the gas atomization device and breaks into small droplets, where the gas atomization pressure is 2MPa;

[0066] S300: The small droplets fall onto the turntable to form flakes; the distance between the turntable and the nozzle is 100mm, and the rotation speed of the turntable is 10000 rpm;

[0067] S400: Perform subsequent processing on the flakes. The cooling water pressure is 2MPa.

[0068] The SEM topography of the Fe-Si-Al flake metal powder that embodiment one makes is ...

Embodiment 2

[0070] Prepare flake aluminum powder. The preparation steps are the same as in Example 1.

[0071] The rotary disk in this embodiment is wedge-shaped.

[0072] The main process parameters are: the heating temperature in the melting furnace is 200°C for the superheating of the melt, the melting process is protected by argon, the gas atomization pressure is 2.5MPa, the diameter of the melt nozzle is 1.5mm, and the distance between the central axis of the nozzle and the wedge-shaped rotary disk The spacing is 80mm, the rotation speed of the wedge-shaped rotary disc is 12000 rpm, and the cooling water pressure is 2MPa.

[0073] The SEM image of the flake aluminum powder prepared according to the above parameters shows that the thickness of the powder is about 1.2 μm, the average particle size is about 150 μm, the aspect ratio is between 100 and 300, the surface is bright and defect-free, and the powder particle size Centralized distribution.

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Abstract

The present invention provides a device and method for preparing flake powder, wherein the device includes a melting device, and a nozzle is arranged on the melting device; a gas atomizing device, the gas atomizing device is arranged below the nozzle; A turntable, the turntable is arranged below the gas atomizing device, and the surface of the turntable close to the gas atomizing device is an inclined plane, and the turntable rotates at a certain speed; and a discharge collecting device , the discharging and collecting device is arranged below the rotary disc. The flake powder preparation device of the invention has the advantages of simple structure, low cost, low energy consumption, convenient operation and no pollution, and can be applied to continuous industrial production for preparing flake metal powder, flake amorphous and flake quasicrystal. and flaky microcrystalline powder.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a preparation device and method of flake powder. Background technique [0002] Flake metal and alloy powders have good adhesion, significant shielding effect, strong ability to reflect light and excellent electrical conductivity, and have been widely used in the fields of electromagnetic shielding, coating industry, pigment industry and conductive paste. application. For example, the magnetic thin plate made of flake metal soft magnetic powder and epoxy resin and other polymer materials has the characteristics of excellent wave absorption and electromagnetic shielding performance, thin thickness, and light weight, which can meet the development needs of miniaturization and light weight of electronic devices. It has been widely used in mobile phones, computers and RFID systems; flake aluminum powder has a good ability to emit heat radiation, forms a continuous metal film when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 董亚强常春涛满其奎黎嘉威李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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