Atomization spray disc, spherical silicon boride ceramic powder, and preparation method and application of spherical silicon boride ceramic powder

A technology of ceramic powder and atomization spraying, applied in the direction of spray evaporation, etc., can solve the problems of inconvenient research and application of electronic functional materials, uneven thickness of coating surface, uneven coating state, etc.

Pending Publication Date: 2021-09-10
盘星新型合金材料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing preparation methods of silicon boride powder materials such as ball milling, vapor deposition or thermal phase sintering, etc., the obtained powders are all non-spherical, the friction between the piled state is large, and the fluidity is poor. The gravity conveying applied on the spraying equipment In the air-flow conveying method, the powder is in the conveying pipeline, which is prone to jams and pauses, intermittent powder feeding, and in severe cases, flow interruption will occur; resulting in uneven thickness of the coating surface during the spraying process, and uneven coating status at different positions , it is expected that the corresponding functions of the coating will be seriously affected, and even cause the workpiece to be scrapped
The composition unif

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  • Atomization spray disc, spherical silicon boride ceramic powder, and preparation method and application of spherical silicon boride ceramic powder
  • Atomization spray disc, spherical silicon boride ceramic powder, and preparation method and application of spherical silicon boride ceramic powder
  • Atomization spray disc, spherical silicon boride ceramic powder, and preparation method and application of spherical silicon boride ceramic powder

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preparation example Construction

[0020] The existing preparation methods of silicon boride powder materials such as ball milling, vapor deposition or thermal phase sintering, etc., the obtained powders are all non-spherical, the friction between the piled state is large, and the fluidity is poor. The gravity conveying applied on the spraying equipment In the air-flow conveying method, the powder is in the conveying pipeline, which is prone to jams and pauses, intermittent powder feeding, and in severe cases, flow interruption will occur; resulting in uneven thickness of the coating surface during the spraying process, and uneven coating status at different positions , it is expected that the corresponding function of the coating will be seriously affected, and even cause the workpiece to be scrapped. The composition uniformity of the powder prepared by the above method is also poor, the deviation is large and the controllability is poor, which will also affect the performance of the coating to varying degrees;...

Embodiment 1

[0023] In order to solve the above technical problems, such as figure 1 As shown, the present invention firstly provides a kind of atomizing spraying plate, comprises: liquid guide tube 3; Enter the catheter tube 3; and the atomized gas inlet pipe 1 located on both sides of the catheter tube 3, which is provided with a spray hole 2 near the end of the catheter tube 3; the atomized gas is suitable for spraying holes from both sides 2 spraying to crush the melt to form powder particles.

[0024] Specifically, the atomizing spray pan can obtain converging high-speed and high-kinetic airflow, and the intersection of the airflow is close to the outlet of the catheter melt, and the high-speed airflow obtained by the airflow leaving the nozzle hole can quickly contact and crush the melt before the kinetic energy is weakened, Obtain ultra-fine powder particles.

[0025] Optionally, the nozzle hole 2 may include, but is not limited to, several closely coupled nozzle holes with an ato...

Embodiment 2

[0030] On the basis of Example 1, the present invention also provides a method for preparing spherical silicon boride ceramic powder, comprising the following steps: step S1, preparing silicon-boron composite block; step S2, heat-melting the silicon-boron composite block After the melt is formed, it is injected into the atomizing spray pan as described in Example 1, and the melt is atomized into fine powder particles under the effect of the protective air flow, and shrinks into balls under the action of surface tension during the atomization flight process. After cooling, it forms spherical silicon boride ceramic powder particles.

[0031] Wherein, optionally, the silicon-boron composite block may include, but not limited to, the following components in parts by mass: Si is 96.2-98.5 parts; B is 1.5-3.8 parts.

[0032] Optionally, the step of preparing the silicon-boron composite material block in the step S1 may be: using arc energy to melt silicon and boron in a vacuum non-c...

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Abstract

The invention belongs to the technical field of silicon boride ceramic powder production, and particularly relates to an atomization spray disc, a spherical silicon boride ceramic powder, and a preparation method and application of the spherical silicon boride ceramic powder. The atomization spray disc comprises: a liquid guide pipe; a crucible positioning circular truncated cone, wherein the smaller bottom surface of the crucible positioning circular truncated cone is connected with the inlet of the liquid guide pipe, so that the molten liquid enters the liquid guide pipe along the crucible; and atomized gas inlet pipes located on the two sides of the liquid guide pipe, wherein spraying holes are formed in the ends, close to the liquid guide pipe, of the atomized gas inlet pipes. The atomized gas is suitable for being sprayed out from the spraying holes in the two sides so as to crush the molten liquid to form powder particles. According to the atomization spray disc, the problems of obtaining of silicon boride spherical powder and uniformity of composite material components are solved, so that silicon boride ceramic powder which is high in sphericity degree, good in fluidity and smooth and stable in conveying state is obtained, and the silicon boride ceramic powder can be used as a research and development material of a spraying coating and a boron-doped novel battery silicon negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of silicon boride ceramic powder production, and in particular relates to an atomization spray pan, spherical silicon boride ceramic powder and a preparation method and application thereof. Background technique [0002] Silicon boride can be used as a variety of standard abrasives, grinding hard alloys, engineering ceramic materials, sandblasting nozzles, blades of gas engines and other special-shaped sintered parts and seals. Some existing preparation methods are mainly ball milling, vapor deposition or thermal phase sintering, and the obtained silicon boride powders are all non-spherical powders. Used in supersonic spraying, plasma spraying, laser cladding and other equipment. [0003] The existing preparation methods of silicon boride powder materials such as ball milling, vapor deposition or thermal phase sintering, etc., the obtained powders are all non-spherical, the friction between the piled state i...

Claims

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Application Information

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IPC IPC(8): B01D1/20B01D1/18C04B35/58C04B35/626
CPCB01D1/20B01D1/18C04B35/5805C04B35/62695C04B35/62665
Inventor 郑云张晓平彭炜
Owner 盘星新型合金材料(常州)有限公司
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