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Alkali metal based aluminum nitride nano-material and preparation method thereof

A nanomaterial, aluminum nitride technology, applied in nanotechnology for materials and surface science, chemical instruments and methods, nitrogen compounds, etc., can solve the problems of high reaction temperature, high temperature, increasing the cost of aluminum nitride products, etc.

Inactive Publication Date: 2015-08-19
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can synthesize high-purity aluminum nitride nanocrystalline powder, the reaction process is cumbersome, and the reaction temperature is as high as 1500°C, which consumes a lot of energy.
[0004] Most of the above methods require very high temperature and relatively complicated experimental equipment, thus increasing the cost of aluminum nitride products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An alkali metal-based aluminum nitride nanomaterial and a preparation method thereof. The preparation method is: first uniformly mixing 65-67wt% of sodium chloride, 4-6wt% of sodium fluoride, 10-12wt% of aluminum powder and 15-20wt% of sodium azide to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 850-950°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3 to 5 times, and dried at 90 to 110°C for 4 to 8 hours to obtain the alkali metal-based aluminum nitride nanometer material.

[0026] The alkali metal-based aluminum nitride nanomaterials prepared in this example were used to prepare aluminum nitride-epoxy resin composite materials. After testing, the tensile shear strength was 4.4~4.7MPa, and the linear expansion coefficient was 4.8×10 -5 ~5.1×10 -5 K -1 ; and the aluminum nitride-epoxy resin comp...

Embodiment 2

[0028] An alkali metal-based aluminum nitride nanomaterial and a preparation method thereof. The preparation method is: first uniformly mixing 65-67wt% of sodium chloride, 2-4wt% of sodium fluoride, 10-12wt% of aluminum powder and 15-20wt% of sodium azide to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 850-950°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3 to 5 times, and dried at 90 to 110°C for 4 to 8 hours to obtain the alkali metal-based aluminum nitride nanometer material.

[0029] The alkali metal-based aluminum nitride nanomaterials prepared in this example were used to prepare aluminum nitride-epoxy resin composite materials. After testing, the tensile shear strength was 4.6~4.8MPa, and the linear expansion coefficient was 4.8×10 -5 ~5.1×10 -5 K -1 ; and the aluminum nitride-epoxy resin comp...

Embodiment 3

[0031] An alkali metal-based aluminum nitride nanomaterial and a preparation method thereof. The preparation method is: first uniformly mixing 67-72wt% of sodium chloride, 2-4wt% of sodium fluoride, 8-10wt% of aluminum powder and 15-20wt% of sodium azide to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 950-1050°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3 to 5 times, and dried at 90 to 110°C for 4 to 8 hours to obtain the alkali metal-based aluminum nitride nanometer material.

[0032] The alkali metal-based aluminum nitride nanomaterials prepared in this example were used to prepare aluminum nitride-epoxy resin composite materials. After testing, the tensile shear strength was 4.5~4.8MPa, and the linear expansion coefficient was 4.6×10 -5 ~4.9×10 -5 K -1 ; and the aluminum nitride-epoxy resin comp...

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Abstract

The invention relates to an alkali metal based aluminum nitride nano-material and a preparation method thereof. The technical scheme includes: firstly mixing 65-77wt% of sodium chloride, 2-6wt% of sodium fluoride, 8-12wt% of aluminum powder and 10-20wt% of sodium azide evenly to obtain a mixture, loading the mixture into a corundum crucible, then placing the corundum crucible in a tubular corundum furnace to carry out reaction at 850-1150DEG C in nitrogen atmosphere for 2.5-3.5h, performing cooling to room temperature, taking out the product, then washing the product 3-5 times, and conducting drying at 90-110DEG C for 4-8h, thus obtaining the alkali metal based aluminum nitride nano-material. According to the invention, the method is simple and the cost is low, the prepared alkali metal based aluminum nitride nano-material has high purity and excellent appearance characteristics.

Description

technical field [0001] The invention belongs to the technical field of aluminum nitride nanometer materials. In particular, it relates to an alkali metal-based aluminum nitride nanometer material and a preparation method thereof. Background technique [0002] Aluminum nitride has remarkable properties of high temperature resistance, corrosion resistance, high thermal conductivity, low thermal expansion coefficient, large resistivity, low dielectric constant, good thermal stability and excellent mechanical stability. Therefore, aluminum nitride has very broad application prospects in many fields. [0003] Currently, Woo-Sik Jung, Hyeong Uk Joo use aluminum hydroxide, acetone and ethylenediaminetetraacetic acid as raw materials to synthesize aluminum nitride whiskers (Woo-Sik Jung, Hyeong Uk Joo. Catalytic growth of aluminum nitride whiskers by a modified carbothermal reduction and nitridation method[J]. J. Crystal. Growth. 2005 (285):566–571), the aluminum nitride whisker...

Claims

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Application Information

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IPC IPC(8): C01B21/072B82Y30/00
Inventor 丁军刘建鹏祝洪喜邓承继李光强宋云飞
Owner WUHAN UNIV OF SCI & TECH
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