Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of high-purity nano aluminum nitride

A nano-aluminum nitride, high-purity technology, applied in chemical instruments and methods, nitrogen compounds, nanotechnology, etc., can solve problems such as large environmental impact and complex aluminum nitride process

Pending Publication Date: 2021-01-22
KUNMING UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a method for preparing high-purity nano-aluminum nitride, aiming at solving the technical problems that the existing high-purity nano-aluminum nitride process is complicated and has a great impact on the environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-purity nano aluminum nitride
  • Preparation method of high-purity nano aluminum nitride
  • Preparation method of high-purity nano aluminum nitride

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] Based on the technical problems that the existing nano-aluminum nitride preparation process is complicated and causes great environmental pollution, the present invention provides a preparation method of high-purity nano-aluminum nitride.

[0037] Such as figure 1 As shown, a method for preparing high-purity nano-aluminum nitride provided by an embodiment of the present invention includes the following steps:

[0038] Provide bulk metal aluminum and tungsten rods, pretreat the bulk metal aluminum, and remove the metal oxide layer on the surface;

[0039] The bulk metal aluminum and the tungsten rod are respectively used as an anode and a cathode and placed in an electric arc furnace, the electric arc furnace is filled with a buffer gas and an arc is started to obtain a mixture of nano-aluminum nitride and aluminum; and

[0040] The mixture is calcined under a nitrogen atmosphere to obtain high-purity nano-aluminum nitride particles.

[0041] Such as figure 2 As show...

Embodiment 1

[0060] A method for preparing high-purity nano-aluminum nitride provided in Example 1 may include the following steps.

[0061] Pretreatment to remove surface oxides and impurities: use tungsten rods as cathodes, use block-shaped aluminum with a metal purity of ≥99% as anodes, and place tungsten rods and block-shaped aluminum in an electric arc furnace, where the diameter of the tungsten rods is 10mm , the distance between the block aluminum metal and the tungsten rod in the electric arc furnace is 3mm, vacuumize, fill with 10kPa hydrogen, set the discharge current to 50A, start the arc, and at the same time, turn on the vacuum pump and process for 2min. Among them, at the same time as the arc discharge, the vacuum pump of the electric arc furnace is turned on to control the flow rate of hydrogen, so that the oxides or impurities on the surface of the block refractory metal and hydrogen undergo redox reactions, and the flue gas generated during the reaction process can be The ...

Embodiment 2

[0069] A method for preparing high-purity nano-aluminum nitride provided in Example 2 may include the following steps.

[0070] Pretreatment to remove surface oxides and impurities: use tungsten rods as cathodes, use block-shaped aluminum with a metal purity of ≥99% as anodes, and place tungsten rods and block-shaped aluminum in an electric arc furnace, where the diameter of the tungsten rods is 10mm , the distance between the block aluminum metal and the tungsten rod in the electric arc furnace is 6mm, vacuumize, fill with 10kPa hydrogen, set the discharge current to 50A, start the arc, and at the same time, turn on the vacuum pump and process for 2min. Among them, at the same time as the arc discharge, the vacuum pump of the electric arc furnace is turned on to control the flow rate of hydrogen, so that the oxides or impurities on the surface of the block refractory metal and hydrogen undergo redox reactions, and the flue gas generated during the reaction process can be The ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of high-purity nano aluminum nitride, which comprises the steps of providing blocky metal aluminum and a tungsten rod, and pretreating the blocky metal aluminum to remove a metal oxide layer on the surface; placing the blocky metal aluminum and the tungsten rod in an electric arc furnace as an anode and a cathode respectively, filling the electric arcfurnace with buffer gas, starting an electric arc, and preparing a mixture of nanometer aluminum nitride and aluminum; and calcining the mixture in a nitrogen atmosphere to obtain the high-purity nanoaluminum nitride particles. The mixture of the nano aluminum nitride and the aluminum is prepared by adopting a direct-current arc plasma method with the advantages of simplicity in operation, environmental friendliness, controllable reaction atmosphere and the like, and then the mixture is calcined to obtain the nano aluminum nitride, so that the preparation process is simple, and the environment is not influenced.

Description

technical field [0001] The invention relates to the field of preparation of metal nanomaterials, in particular to a preparation method of high-purity nano-aluminum nitride. Background technique [0002] Aluminum nitride nano (AlN) ceramics is a covalently bonded polycrystal with a hexagonal wurtzite structure, which has the characteristics of high thermal conductivity, low thermal expansion coefficient and dielectric constant, insulation, and non-toxicity. Insulating substrates for power semiconductor devices, heat dissipation substrates and packaging substrates for large-scale and ultra-large-scale integrated circuits. At the same time, AlN nanometers have good high-temperature chemical stability and are good high-temperature corrosion-resistant materials. In addition, another potential application field of AlN nanometer is as a filler, which can be prepared into various composite materials with excellent properties. The characteristics of AlN nanopowder directly affect i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B21/072B82Y30/00B82Y40/00
CPCC01B21/0724B82Y30/00B82Y40/00C01P2002/72C01P2004/04C01P2006/80C01P2004/64C01P2004/62
Inventor 梁风张达唐政刚杨泻铖马文会杨斌戴永年
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com