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Method for preparing nano aluminum nitride material through electrical explosion process

A nano-aluminum nitride and electric explosion technology is applied in the field of technology, which can solve the problems of large average particle size of nano-aluminum nitride, low gas medium quenching rate, and potential safety hazards, and achieves high cooling rate, low production cost, The effect of shortening the time for grain growth

Inactive Publication Date: 2015-09-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the selection of high-pressure gas medium or toxic gas medium, there is a high requirement for the sealing of the electric explosion device, which increases the cost of the device and is prone to safety hazards; in addition, the quenching rate of the gas medium is relatively low, and the nanometer prepared under the same conditions The average particle size of aluminum nitride is large and uneven

Method used

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  • Method for preparing nano aluminum nitride material through electrical explosion process
  • Method for preparing nano aluminum nitride material through electrical explosion process
  • Method for preparing nano aluminum nitride material through electrical explosion process

Examples

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Embodiment 1

[0038] A method for preparing nano-aluminum nitride material by electric explosion, the specific steps of the method are as follows:

[0039] (1) Assembling and debugging the electric explosion system, so that the distance between the two electrodes on the electric explosion tank is 50mm ± 0.5mm; the aluminum wire with a purity of 99.99% is fixed between the electrodes by the electrode chuck;

[0040] (2) Clean the electric explosion tank with absolute ethanol, and dry it with a hot air blower; pour liquid nitrogen into the electric explosion tank so that it has not passed the pure copper electrode 5cm of the electric explosion tank, and seal the electric explosion tank by the tank cover;

[0041] (3) charge the high-voltage capacitor bank in the electric explosion system, make the voltage of the high-voltage capacitor bank reach 10kV, start the electric explosion system, and discharge;

[0042] (4) When the voltage of the high-voltage capacitor group is 0kV, open the electric e...

Embodiment 2

[0048] A method for preparing nano-aluminum nitride material by electric explosion, the specific steps of the method are as follows:

[0049] (1) Assembling and debugging the electric explosion system, so that the distance between the two electrodes on the electric explosion tank is 50mm ± 0.5mm; the aluminum wire with a purity of 99.99% is fixed between the electrodes by the electrode chuck;

[0050] (2) Clean the electric explosion tank with absolute ethanol, and dry it with a hot air blower; pour liquid nitrogen into the electric explosion tank, so that it has not passed the pure copper electrode 5.5cm of the electric explosion tank, and seal the electric explosion tank through the tank cover ;

[0051] (3) charge the high-voltage capacitor bank in the electric explosion system, make the voltage of the high-voltage capacitor bank reach 15kV, start the electric explosion system, and discharge;

[0052] (4) When the voltage of the high-voltage capacitor group is 0kV, open th...

Embodiment 3

[0058] A method for preparing nano-aluminum nitride material by electric explosion, the specific steps of the method are as follows:

[0059] (1) Assembling and debugging the electric explosion system, so that the distance between the two electrodes on the electric explosion tank is 50mm ± 0.5mm; the aluminum wire with a purity of 99.99% is fixed between the electrodes by the electrode chuck;

[0060] (2) Clean the electric explosion tank with absolute ethanol, and dry it with a hot air blower; pour liquid nitrogen into the electric explosion tank, so that it has not passed the pure copper electrode 5.5cm of the electric explosion tank, and seal the electric explosion tank through the tank cover ;

[0061] (3) charge the high-voltage capacitor bank in the electric explosion system, make the voltage of the high-voltage capacitor bank reach 19kV, start the electric explosion system, and discharge;

[0062] (4) When the voltage of the high-voltage capacitor group is 0kV, open th...

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Abstract

The invention discloses a method for preparing the nano aluminum nitride material through the electrical explosion process and belongs to the field of process technology. The method comprises the steps of assembling and debugging an electrical explosion system, fixing an aluminum wire between electrodes, adding the liquid nitrogen in an electrical explosion tank, sealing the electrical explosion tank, charging a high-voltage capacitor bank in the electrical explosion system, switching on the electrical explosion system, opening the electrical explosion tank after the discharge process after the discharging process, collecting powders inside the electrical explosion tank, adding powders (a) in the excess ethanol solution of saturated hydrogen chloride, reacting the powders with the solution for 12 to 15 hours at 40 to 50 DEG C, filtering, washing to a neutral stance, and drying in vacuum for 24 to 48 hours at -50 to -55 DEG C to obtain the nano aluminum nitride material. The above method has no requirement on the sealing property and is good in safety and higher in cooling rate. The obtained nano aluminum nitride material is small and uniform in particle size.

Description

technical field [0001] The invention relates to a method for preparing nano-aluminum nitride material by electric explosion, which belongs to the technical field of technology. Background technique [0002] Aluminum nitride (AlN) is an atomic crystal, belonging to a diamond-like nitride, with a maximum stable temperature of 2200°C. The strength is high at room temperature, and its strength decreases slowly with the increase of temperature. AlN ceramics have good thermal conductivity, linear expansion coefficient close to that of silicon, high volume resistivity, small dielectric constant and dielectric loss, non-toxic, high temperature and corrosion resistance, good mechanical properties, and its overall performance is better than that of Al 2 o 3 BeO and BeO are ideal materials for the packaging of new-generation semiconductor substrates and electronic devices, and have broad application prospects in the electronics industry. AlN powder is the raw material for preparing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/072B82Y30/00
Inventor 陈鹏万高鑫徐春晓尹昊梅小峰兰雅竹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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