Preparation method of aluminum oxide-carbon nano tube composite powder material

A carbon nanotube composite, alumina powder technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex steps and high processing temperature, and achieve lower production costs and environmental protection. The effect of friendly, good industrial prospects

Inactive Publication Date: 2015-12-30
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still problems such as complicated steps and high processing temperature.

Method used

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  • Preparation method of aluminum oxide-carbon nano tube composite powder material
  • Preparation method of aluminum oxide-carbon nano tube composite powder material

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Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing an alumina-carbon nanotube powder composite material, and the preparation steps are as follows:

[0026] (1) Dry the alumina powder (average powder diameter: 10 μm, purity greater than 95%), pass through a 200-mesh sieve three times to break the hard agglomeration of the powder after long-term storage, and then dry the processed alumina powder 5g of aluminum powder is placed in the chemical vapor deposition reaction chamber, vacuumed to 5Pa, and preheated to 600°C;

[0027] (2) Rotary chemical vapor deposition reaction chamber, rotating speed 15rpm;

[0028] (3) 1g metal-organic precursor nickelocene (Ni(C 5 h 5 ) 2 ) as a raw material, heated to 150°C in an evaporator to obtain a raw material mixed gas;

[0029] (4) Open the evaporator valve, introduce the raw material mixed gas described in step (3) into the chemical vapor deposition reaction chamber, and introduce argon gas at the same time, the flow rate of argon g...

Embodiment 2

[0036] This embodiment provides a method for preparing an alumina-carbon nanotube powder composite material, and the preparation steps are as follows:

[0037] (1) Dry the alumina powder (average powder diameter: 0.1 μm, purity greater than 95%), pass through a 200-mesh sieve three times to break the hard agglomeration of the powder after long-term storage, and then put the processed Put 5g of alumina powder in the chemical vapor deposition reaction chamber, evacuate to 5Pa, and preheat to 400°C;

[0038] (2) Rotary chemical vapor deposition reaction chamber, rotating speed 30rpm;

[0039] (3) 2g metal-organic precursor nickel acetate (Ni(CH 3COO) 2 ) as a raw material, heated to 100°C in an evaporator;

[0040] (4) Open the valve of the evaporator, introduce the raw material mixed gas into the chemical vapor deposition reaction chamber, and introduce the argon gas flow rate of 100 sccm at the same time to decompose the metal organic precursor, and the metal nanoparticles a...

Embodiment 3

[0045] This embodiment provides a method for preparing an alumina-carbon nanotube powder composite material, and the preparation steps are as follows:

[0046] (1) Dry the alumina powder (powder diameter: 100 μm) and pass it through a 200-mesh sieve three times to break the hard agglomeration of the powder after long-term storage, and then place 5 g of the processed alumina powder in the In the chemical vapor deposition reaction chamber, vacuumize to 20Pa and preheat to 800°C;

[0047] (2) The rotary reactor is started to rotate at a speed of 60rpm;

[0048] (3) 1.7g metal-organic precursor ferrocene (Fe(C 5 h 5 ) 2 ) as a raw material, heated to 200°C in an evaporator;

[0049] (4) Open the valve of the evaporator, introduce the mixed gas of raw materials into the chemical vapor deposition reaction chamber, and introduce the flow rate of argon gas at 100 sccm at the same time, so that the metal organic precursor is decomposed, and the metal nanoparticles are deposited on ...

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Abstract

The invention discloses a preparation method of an aluminum oxide-carbon nano tube composite powder material. The preparation method comprises the steps of through a chemical vapor deposition method, taking a metal organic precursor as a raw material, under the temperature condition of 400 to 800 DEG C, taking metal nano particles formed on the surface of aluminum oxide powder as a catalyst, simultaneously pumping carbon-rich gases such as methane and acetylene, and enabling carbon nano tubes to grow in situ, so as to obtain an aluminum oxide-metal nano particle-carbon nano tube composite powder material. Through changing various parameters such as the weight of the organic raw material, the flow or constituent of a reactant gas and reaction temperature, the decomposition of the raw material and the generation of the metal nano particles and the carbon nano tubes are adjusted, and the size and the microstructure of the powder is controlled. The method has the characteristics of being simple, short in preparation period and the like, and the prepared aluminum oxide-metal nano particle-carbon nano tubes are uniformly distributed, and have wide application prospect in multiple fields such as conductive ceramics and catalytic materials.

Description

technical field [0001] The invention specifically relates to a method for generating carbon nanotubes in alumina ceramic powder, which belongs to the field of material processing engineering. Background technique [0002] Oxide ceramics such as alumina and zirconia are currently widely used ceramic materials. They have the characteristics of corrosion resistance, oxidation resistance, and large specific surface area. They can be used as absorbents, catalyst carriers, composite material reinforcements, high-speed cutting tools, medical materials and wear-resistant parts, etc. Carbon nanotubes have many advantages such as large specific surface area, ultra-high modulus, high strength, and good conductivity. They have broad application prospects in many fields such as high-performance composite materials, medical materials, and electronic field emission devices. They can also be used in Reinforcement of alumina to improve its electrical conductivity, catalytic activity and oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C01B31/02B82Y30/00
Inventor 张建峰刘芸伊李改叶苏依林梁萧吴玉娜吴玉萍
Owner HOHAI UNIV
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