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Method for solid-phase double decomposition to synthesize nanometer aluminium nitride

A nano-aluminum nitride, metathesis technology, applied in chemical instruments and methods, nitrogen compounds, nanotechnology, etc., can solve the problems of long synthesis reaction time, complex equipment, high cost, and achieve cost and energy saving, simple equipment, high performance excellent effect

Inactive Publication Date: 2006-02-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings of high temperature, long synthesis reaction time, complex and expensive equipment and high cost in the existing AlN synthesis, the purpose of the present invention is to provide a method for synthesizing nano-aluminum nitride by solid-phase metathesis, which can be used at low temperature or Under medium temperature and low pressure conditions, using simple synthesis equipment, high-quality nano-aluminum nitride (hereinafter referred to as AlN) materials are synthesized, and the particle size is adjustable (the adjustment range can be from several nanometers to tens of nanometers), and the purity Very high AlN material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 2g and 4.5g of commercially available analytically pure magnesium nitride powder and anhydrous aluminum trichloride crystals under anhydrous and oxygen-free conditions, mix them uniformly under anhydrous and oxygen-free conditions, and then seal them in a sealed container. Heat it in a heating furnace to 600°C for 6 hours, cool to room temperature with the furnace, take out the product, wash and filter three times with deionized water, and heat the final product to 70°C in a vacuum drying oven for 2 hours to dry, that is, nano grade AlN particles.

Embodiment 2

[0018] Weigh 2g and 4.5g of commercially available analytically pure magnesium nitride powder and anhydrous aluminum trichloride crystals under anhydrous and oxygen-free conditions, mix them uniformly under anhydrous and oxygen-free conditions, and then seal them in a sealed container. Heating in a heating furnace to 700°C for 6 hours, cooling to room temperature with the furnace, taking out the product, washing and filtering with deionized water three times, and drying the final product in a vacuum drying oven at 70°C for 2 hours to obtain nano grade AlN particles.

Embodiment 3

[0020] Weigh 2.5g and 6.8g of commercially available analytically pure magnesium nitride powder and anhydrous aluminum trichloride crystals under anhydrous and oxygen-free conditions, mix them evenly under anhydrous and oxygen-free conditions, and then seal them in a sealed container , heated to 800°C in a heating furnace for 6 hours, cooled to room temperature with the furnace, took out the product, washed and filtered three times with deionized water, and dried the final product by heating to 70°C in a vacuum oven for 2 hours to obtain Nanoscale AlN particles.

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PUM

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Abstract

The invention discloses a method for solid-phase double decomposition to synthesize nanometer aluminium nitride, which comprises mixing nitrides and aluminium trichloride homogeneously according to requirement of chemical equivalent ratio under the condition of waterless and oxygen free, sealing into a airtight container, heating to a temperature of 400-800 deg. C for reaction, thermally insulating 4-8 hours, cooling down to room temperature, washing the outcome yield with deionized water to remove chlorides, obtaining A1N powder and drying 2h at 70 deg C, finally synthesizing nano aluminium nitride material through solid phase double decomposition reaction.

Description

technical field [0001] The invention relates to a method for synthesizing aluminum nitride, in particular to a method for synthesizing nanometer aluminum nitride by solid phase metathesis. Background technique [0002] At present, the known preparation methods of aluminum nitride are as follows: 1. Direct nitriding of aluminum powder, which is the earliest method used to prepare aluminum nitride. Its original history is to heat aluminum powder to high temperature, and then The principle of oxidation to obtain Al is to heat the aluminum powder to a high temperature, and then oxidize it in an atmosphere of nitrogen or ammonia to obtain AlN. The disadvantage of this method is that the reaction temperature is high, and the general reaction temperature is 1350-1650 ℃; and because the reaction is a gas-solid reaction, the reaction proceeds very slowly and the reaction is not complete; since the surface of the metal aluminum powder inevitably contains a cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/072B82B3/00
Inventor 颜国君陈光德
Owner XI AN JIAOTONG UNIV