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Method for producing high-purity aluminum nitride powder with fine metal aluminum powder

A technology of metal aluminum powder and aluminum nitride powder, which is applied in the field of non-metal powder material production, and can solve problems such as difficulty in application and purity less than 80%

Active Publication Date: 2015-10-07
TAIZHOU RUNJIE LOGISTICS SAFETY EQUIP TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] There are currently two processes for producing aluminum nitride. One is to use aluminum oxide or aluminum to react with nitric acid to produce aluminum nitrate, and then undergo deoxidation reaction to produce aluminum nitride. The aluminum nitride produced by this method is blocky and the purity is less than The other is to use aluminum wire as a cathode in a plasma generator with high-purity nitrogen gas, so that the ionized aluminum ions react with nitrogen to form aluminum nitride and deposit it. The purity of aluminum nitride produced by this method is Higher, up to 99.99%, but the product is a thin film deposited on the surface of other materials, which is difficult to apply in many aspects

Method used

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  • Method for producing high-purity aluminum nitride powder with fine metal aluminum powder

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Experimental program
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Embodiment Construction

[0008] 1. Open the inlet valve (13) of the receiving tank, close the outlet valve (15) of the receiving tank, and open the valve of the high-purity nitrogen tank (1).

[0009] 2. Start the blower fan (2) and the heat exchanger (11), so that nitrogen with a purity greater than 99.9999% circulates in the device.

[0010] 3. Add aluminum liquid with an aluminum content of more than 99.98% to the intermediate frequency furnace aluminum liquid heater heating tube ( 9) The aluminum liquid level reaches the required height.

[0011] 4. Start the heating coil (7) of the aluminum liquid heater of the intermediate frequency furnace to heat the aluminum liquid to above 1400°C.

[0012] 5. Open the pulse valve (6) of the aluminum powder feeding tank, and add aluminum powder with an aluminum content of more than 99.99% and a particle size of less than 10 μm into the feeding pipe (3) of the aluminum liquid heater of the intermediate frequency furnace at a constant speed, and the content of...

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Abstract

The invention discloses a method for producing high-purity aluminum nitride powder by using superfine metal aluminum powder. High-temperature molten aluminum with aluminum content of over 99.99% is adopted as a heat source, the high-purity superfine metal aluminum powder and a nitrogen gas mixture with purity of over 99.9999% are heated to over 1400 DEG C, the aluminum powder and the nitrogen gas react to generate high-purity aluminum nitride powder; moreover, aluminum vapor generated by the high-temperature molten aluminum also reacts with the nitrogen gas to generate high-purity aluminum nitride powder; the generated aluminum nitride powder is carried by flowing nitrogen gas to be cooled and collected.

Description

technical field [0001] The invention is a method of using high-purity fine metal aluminum powder as raw material, mixing it with high-purity nitrogen and heating it to a certain temperature, so that the aluminum powder is burned in nitrogen to generate high-purity aluminum nitride, which belongs to the production of non-metallic powder materials technology field. Background technique [0002] There are currently two processes for producing aluminum nitride. One is to use aluminum oxide or aluminum to react with nitric acid to produce aluminum nitrate, and then undergo a deoxidation reaction to produce aluminum nitride. The aluminum nitride produced by this method is blocky and the purity is less than The other is to use aluminum wire as a cathode in a plasma generator with high-purity nitrogen gas, so that the ionized aluminum ions react with nitrogen to form aluminum nitride and deposit it. The purity of aluminum nitride produced by this method is Higher, up to 99.99%, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/072
Inventor 袁志刚袁坤羊斌
Owner TAIZHOU RUNJIE LOGISTICS SAFETY EQUIP TECH CO LTD
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