Method for preparing carbon nanotube/magnesium composite powder by nickel catalytic in-situ chemical vapor deposition

A technology of chemical vapor deposition and carbon nanotubes, which is applied in the field of carbon nanotube/metal composite powder preparation, can solve problems such as no research reports, and achieve the effect of simple process, good dispersion and uniform size

Inactive Publication Date: 2012-01-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Using nickel as a catalyst on magnesium powder, carbon nanotubes are synthesized in situ by chemical vapor deposition to prepare carbon nanotube / magnesium composite powders. There is no research report yet.

Method used

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  • Method for preparing carbon nanotube/magnesium composite powder by nickel catalytic in-situ chemical vapor deposition
  • Method for preparing carbon nanotube/magnesium composite powder by nickel catalytic in-situ chemical vapor deposition
  • Method for preparing carbon nanotube/magnesium composite powder by nickel catalytic in-situ chemical vapor deposition

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Add 5g of magnesium powder and 1.239g of nickel nitrate hexahydrate into 100mL of absolute ethanol, ultrasonically disperse with a power of 100W for 5 minutes, then magnetically stir at room temperature, and control the temperature at 65°C to slowly volatilize the absolute ethanol. until evaporated. Under the protection of argon, the obtained product was heated at 10°C / min to a temperature of 200°C, calcined for 4 hours, and cooled to room temperature with the furnace in an argon atmosphere to obtain a catalyst precursor with a mass ratio of nickel / magnesium of 0.05:1. Take 0.5g of nickel / magnesium catalyst precursor powder, spread evenly in the quartz boat, and place the quartz boat in the constant temperature zone in the middle of the quartz reaction tube. After ℃, feed hydrogen at 100mL / min, turn off the hydrogen after 2 hours, and raise the temperature to 500℃ at 10℃ / min under the protection of argon, then introduce methane as the carbon source gas, and then make th...

Embodiment 2

[0018] Add 5g of magnesium powder and 1.586g of nickel nitrate hexahydrate into 100mL of absolute ethanol, ultrasonically disperse with a power of 100W for 5 minutes, then magnetically stir at room temperature, and control the temperature at 65°C to slowly volatilize the absolute ethanol. until evaporated. Under the protection of argon, the obtained product was heated at 10 °C / min to a temperature of 400 °C, calcined for 2 h, and cooled to room temperature in an argon atmosphere with the furnace to obtain a catalyst precursor with a nickel / magnesium mass ratio of 0.08:1. Take 0.5g nickel / magnesium catalyst precursor powder, spread evenly in the quartz boat, and place the quartz boat in the constant temperature zone in the middle of the quartz reaction tube. After ℃, flow in hydrogen at 50mL / min, turn off the hydrogen after 4 hours, and raise the temperature to 550℃ at 10℃ / min under the protection of argon, then introduce methane as the carbon source gas, and then make the argo...

Embodiment 3

[0020] Add 5g of magnesium powder and 1.239g of nickel nitrate hexahydrate into 100mL of absolute ethanol, ultrasonically disperse with a power of 100W for 5 minutes, then magnetically stir at room temperature, and control the temperature at 65°C to slowly volatilize the absolute ethanol. until evaporated. Under the protection of argon, the obtained product was heated at 10°C / min to a temperature of 300°C, calcined for 3 hours, and cooled to room temperature in an argon atmosphere with the furnace to obtain a catalyst precursor with a mass ratio of nickel / magnesium of 0.05:1. Take 0.5g of nickel / magnesium catalyst precursor powder, spread evenly in the quartz boat, place the quartz boat in the constant temperature zone in the middle of the quartz reaction tube, first pass argon into the reaction tube, and raise it to 450 After ℃, flow in hydrogen gas at 200mL / min, turn off the hydrogen gas after 2 hours, and keep it warm at 450℃ under the protection of argon, then let in metha...

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PUM

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Abstract

The invention discloses a method for preparing carbon nanotube / magnesium composite powder by nickel catalytic in-situ chemical vapor deposition, and the process of the method comprises the following steps: adding nickel nitrate hexahydrate and magnesium powder into anhydrous ethanol, and preparing a precursor of a nickel / magnesium catalyst through the thermal decomposition method; and placing theprecursor of the nickel / magnesium catalyst in a quartz reaction tube, increasing the temperature to the reduction temperature under the protection of argon, introducing hydrogen for reduction, and then taking methane as carbon source gas and taking the argon as carrier gas for preparing the carbon nanotube / magnesium composite powder by using the chemical vapor deposition method at the growth temperature. The method has simple and time-saving process, the in-situ growth on the carbon nanotube / magnesium powder has good dispersion, and a carbon nanotube further has narrow tube diameter and uniform size, thereby being particularly applicable to preparing carbon nanotube-reinforced magnesium matrix composites.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotube / magnesium composite powder by nickel-catalyzed in-situ chemical vapor deposition, which belongs to the preparation technology of carbon nanotube / metal composite powder. Background technique [0002] Since carbon nanotubes were discovered in 1991, due to their excellent mechanical, thermal, electrical and other properties, they have attracted the attention of many disciplines in the world, and have also triggered new research hotspots in the field of advanced composite materials. Due to their excellent mechanical properties, carbon nanotubes are an ideal reinforcement for lightweight and high-strength metal matrix composites. [0003] As the lightest structural material, magnesium has low density, high strength, good damping performance and excellent casting and mechanical properties. Magnesium matrix composites have become the focus of metal matrix composites research. However, the use of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22
Inventor 赵乃勤刘阳思师春生
Owner TIANJIN UNIV
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