Preparation method and equipment of silicon nitride powder

A technology of silicon nitride powder and equipment, which is applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problem of reducing the production efficiency of silicon nitride powder, high raw material costs, and the inability to realize continuous preparation of silicon nitride powder, etc. problem, to achieve the effect of improving production efficiency, reducing production cost and improving production efficiency

Active Publication Date: 2021-09-17
上瓷宗材上海精密陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing silicon nitride powder and its equipment, which solves the problem that the cost of raw materials for preparing silicon nitride powder in the prior art is relatively high, and the continuous production of silicon nitride powder cannot be realized. Non-destructive preparation, reducing the problem of silicon nitride powder production efficiency

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  • Preparation method and equipment of silicon nitride powder
  • Preparation method and equipment of silicon nitride powder
  • Preparation method and equipment of silicon nitride powder

Examples

Experimental program
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Effect test

Embodiment 1

[0041] see Figure 1-8 Shown, a kind of preparation method of silicon nitride powder comprises the following steps:

[0042] The first step is to add silicon powder screened with a particle size of 0.1 μm into the feeding tank 201, close the sealing block 202, drive the protective plate 401 into the connecting groove 402 through the drive shaft of the electric push rod 403, and turn the adjusting screw 501 to make the movement The frame 30 slides downward on one side of the frame 10 until the output end of the carbon dioxide laser 40 enters the inside of the through hole 60;

[0043] In the second step, the linear motor 303 drives the feeding frame 301 to slide inside the reaction box 20 until the material guiding pipe 1 304 slides directly below the feeding tank 201, and the drive shaft of the servo electric cylinder 3 308 pushes the connecting frame 2 309 upward until the top of the feeding pipe 304 is inserted into the feeding tank 201, the servo motor 203 drives the mater...

Embodiment 2

[0048] see Figure 1-3 As shown, a preparation device for silicon nitride powder includes a frame 10 and a reaction box 20 arranged on the top of the frame 10, a movable frame 30 is slidably arranged on one side of the frame 10, and a movable frame 30 is arranged on one side There is a carbon dioxide laser 40, the power of the carbon dioxide laser 40 is 5000W, and the right side of the reaction box 20 is communicated with an air duct 50, and a large amount of nitrogen gas is introduced into the interior of the reaction box 20 through the air duct 50, and the silicon material is in the nitrogen atmosphere of the reaction box 20. A photochemical reaction is generated in the middle, and finally silicon nitride powder is produced. A through hole 60 is provided above the inside of the reaction box 20, and a transparent plate 70 is arranged below the inside of the through hole 60. A fixing frame 80 is arranged inside the reaction box 20, and fixed The inside of the frame 80 is provi...

Embodiment 3

[0050] see Figure 4-5 As shown, in the present invention, a feeding mechanism is provided on the left side inside the reaction box 20, and the feeding mechanism includes a feeding tank 201, and a sealing block 202 is arranged above the inside of the feeding tank 201, and a servo motor 203 is arranged inside the sealing block 202, and One end of the output shaft of the servo motor 203 is fixedly connected with a rotating rod 204 through a coupling, and the bottom of the feeding tank 201 is provided with a material distribution plate 205, and the bottom of the rotation rod 204 is rotationally connected with the top of the material distribution plate 205. The inside of the plate 205 is provided with two arc grooves 206, and the inside of the two arc grooves 206 is provided with a material stopper 207, and the material stopper 207 is used to rotate inside the arc groove 206 to realize the circular arc groove 206. For the on-off of the top and bottom of the feeding tank 201 , one ...

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Abstract

The invention discloses a preparation method and equipment of silicon nitride powder, and relates to the technical field of chemical synthesis. The preparation method comprises the following steps: conveying a silicon powder raw material, introducing nitrogen into a reaction box, carrying out irradiation treatment on the silicon powder raw material by utilizing a carbon dioxide laser, and carrying out photochemical reaction on the silicon powder and the nitrogen to obtain the silicon nitride powder. According to the method, the carbon dioxide laser is adopted to emit carbon dioxide laser to irradiate silicon powder, a silicon material has a very strong infrared absorption spectrum at 10.7 mu m, the 10.6 mu m wavelength of the carbon dioxide laser accords with an absorption peak of silicon, and the 10.7 mu m absorption peak of the silicon material is utilized to absorb energy of the carbon dioxide laser, and a photochemical reaction is generated in the reaction box containing sufficient nitrogen to obtain the silicon nitride powder. Compared with the prior art, the preparation method has the advantages that the preparation cost of the silicon nitride powder is reduced while the preparation efficiency of the silicon nitride powder is greatly improved, so that the preparation production efficiency of the silicon nitride powder is effectively improved.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a method for preparing silicon nitride powder and equipment thereof. Background technique [0002] Silicon nitride material is a new high thermal conductivity filler with application potential. It has high hardness, wear resistance, large elastic modulus, high strength, high temperature resistance, small thermal expansion coefficient, large thermal conductivity, low density, and small specific gravity. Anti-oxidation, anti-chemical corrosion, its performance is comparable to that of alloys, and has broad application prospects in chemical, textile, aerospace, metallurgy, machinery, petroleum, transportation and other fields; [0003] At present, most of the synthesis of silicon nitride materials adopts chemical methods. The synthetic materials of silicon nitride are put into the electric vacuum reactor, and the silicon nitride products are obtained after more than 70 ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/068
CPCC01B21/0682
Inventor 刘宗才许建文裴晨艺许轶雯
Owner 上瓷宗材上海精密陶瓷有限公司
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