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Preparation method of nano aluminium nitride powder

A nano-aluminum nitride and aluminum nitride technology, which is applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of difficult control of combustion temperature, long preparation time of precursors, and difficulty in mass production, etc. The effect of carbothermal reduction reaction temperature, fine aluminum source particles, and tight combination

Inactive Publication Date: 2015-06-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has complex equipment, high production cost, and difficulty in batch production
Patent CN103539088A discloses a method for preparing aluminum nitride nanoparticles, using aluminum nitrate nonahydrate and melamine as raw materials, using a sol-gel process to prepare a precursor, and then preparing aluminum nitride by carbothermal reduction reaction of the precursor, but the method Precursor preparation takes a long time (10-20 hours), and the process is more complicated
Patent CN101973534A discloses a method for preparing aluminum nitride powder by burning precursors at low temperature. Aluminum nitrate is used as aluminum source and oxidant, urea is used as fuel, and glucose, sucrose, and soluble starch are used as carbon sources. Good results have been achieved, but due to the use of urea is used as fuel, the combustion temperature is not easy to control, and the precursor and the synthesized aluminum nitride powder are mostly sheet-like aggregates, so this method needs to be further improved

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  • Preparation method of nano aluminium nitride powder
  • Preparation method of nano aluminium nitride powder

Examples

Experimental program
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Embodiment 1

[0024] Weigh 0.1 mole of aluminum nitrate, 0.17 mole of glycine, and 0.13 mole of glucose, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained. After the precursor powder is reacted at 1600°C and nitrogen atmosphere for 3 hours, the product is reacted at 700°C and air atmosphere for 2 hours. The nano-aluminum nitride powder with a particle size of about 35-47nm and good sphericity and dispersibility is obtained.

Embodiment 2

[0026] Weigh 0.1 mol of aluminum chloride, 0.3 mol of ammonium nitrate, 0.1 mol of glycine, and 0.13 mol of glucose, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained. After the precursor powder is reacted at 1500°C and nitrogen atmosphere for 2 hours, the product is reacted at 700°C and air atmosphere for 2 hours. The nano-aluminum nitride powder with a particle size of about 33-45nm and good sphericity and dispersibility is obtained.

Embodiment 3

[0028] Weigh 0.1 mol of aluminum chloride, 0.3 mol of ammonium nitrate, 0.05 mol of glycine, and 0.17 mol of glucose, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained. After the precursor powder is reacted at 1450°C and nitrogen atmosphere for 3 hours, the product is reacted at 700°C and air atmosphere for 2 hours. The nano-aluminum nitride powder with a particle size of about 30-42nm and good sphericity and dispersibility is obtained.

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Abstract

The invention discloses a preparation method of nano aluminium nitride powder, belonging to the technical field of nano material preparation. The preparation method comprises the following steps: preparing a solution according to a certain proportion by adopting aluminium sources, water-soluble carbon sources and assistant agents as raw materials; heating the solution, so that the solution is decomposed after being volatilized and concentrated, thus obtaining precursor powder; reacting the precursor powder in a certain atmosphere at 1200-1800 DEG C for 1-5 hours; treating the powder after reaction in the air at 500-800 DEG C for 1-3 hours, thus obtaining the nano aluminium nitride powder. The preparation method is simple in process and low in cost and can be used for obtaining the nano aluminium nitride powder which has good degree of sphericity and dispersibility and has a particle size smaller than 50nm.

Description

Technical field: [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a preparation method of nanometer aluminum nitride powder. Background technique: [0002] Aluminum nitride ceramics have high thermal conductivity, low dielectric constant and dielectric loss, reliable electrical insulation, high temperature resistance, corrosion resistance, non-toxicity, good mechanical properties, and a thermal expansion coefficient that matches silicon. The series of excellent properties can be applied not only as functional ceramic materials (such as substrates and packaging materials of integrated circuits), but also as structural materials (such as components used in high temperature and corrosive environments). one of the research hotspots. [0003] High-quality powder raw materials are a prerequisite for obtaining high-performance products. To prepare ceramic materials with excellent performance, it is often necessary to pre...

Claims

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Application Information

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IPC IPC(8): C01B21/072C04B35/581C04B35/626
Inventor 秦明礼吴昊阳鲁慧峰陈鹏起贾宝瑞曲选辉
Owner UNIV OF SCI & TECH BEIJING
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