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Shock wave process and apparatus for synthesizing cubic silicon nitride material

A technology of cubic silicon nitride and synthesis method, which is applied in the direction of nitrogen compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of complicated laboratory operation, inability to meet industrial application, harsh conditions, etc. The effect of industrial application prospect

Inactive Publication Date: 2007-06-06
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0005] In summary, the new cubic silicon nitride material synthesized by the existing technology can only meet the needs of laboratory research, but cannot meet the needs of industrial applications.
The output of the existing technology to synthesize cubic silicon nitride is too low, and the conditions are harsh, the cost is expensive, and the laboratory operation is complicated
It is difficult to meet the demand for mass production of cheap cubic silicon nitride materials

Method used

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  • Shock wave process and apparatus for synthesizing cubic silicon nitride material
  • Shock wave process and apparatus for synthesizing cubic silicon nitride material

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Experimental program
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Effect test

Embodiment 1

[0041] Weigh 2.3 grams of α-phase silicon nitride powder with a particle size of 1 μm to 10 μm as the initial raw material, then weigh 9.2 grams of copper powder with a particle size of 200 mesh to 300 mesh and mix it evenly with the α-phase silicon nitride raw material, of which copper powder is an additive , mainly plays the role of cooling, and its mass percentage is 90%, and the α-phase silicon nitride powder is used as raw material, and its mass percentage is 10%. Put the mixed raw materials in an agate mortar and grind for half an hour, then pour the ground mixed material into the copper raw material chamber, and then use a press to compact the mixed raw materials in the raw material chamber with a pressure of 5Mpa. Put the raw material box 9 in the recovery device part, then assemble the detonation loading device part at the upper end of the recovery device part, put the copper flyer 5 with a diameter of 60 mm and a thickness of 1 mm at the bottom of the cartridge 3, and...

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Abstract

The present invention discloses shock wave process and apparatus for synthesizing cubic silicon nitride material. The present invention adopts detonation loading plant to produce shock wave of high pressure and high temperature to synthesize low pressure hexagonal phase silicon nitride material into high pressure cubic silicon nitride material. The present invention makes it possible to obtain great amount of cubic silicon nitride material in low cost, and the preparation process has excellent industrial application foreground.

Description

technical field [0001] The invention belongs to the field of synthesis of superhard materials, and in particular relates to a synthesis method and a synthesis device of cubic silicon nitride materials, in particular, a controllable detonation loading device is used to convert low-pressure hexagonal (α and β phase) silicon nitride into Cubic silicon nitride method and apparatus. Background technique [0002] Cubic silicon nitride is a new type of functional material with excellent performance. Compared with α and β silicon nitride commonly used at present, it has more unique properties. [0003] At present, silicon nitride with cubic phase structure can be synthesized under high temperature and high pressure conditions, such as static high pressure technology or dynamic high pressure technology with light gas gun as shock wave loading method to artificially synthesize cubic phase silicon nitride materials. [0004] In July 1999, Zerr et al. reported for the first time in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/08C01B21/068
Inventor 刘雨生贺红亮刘高旻杜金梅张福平张毅王海晏
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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