Nanocomposites Tungsten Carbide Prepared from Ammonium Paratungstate 1/2

Nanocomposites material is using resin, rubber, ceramics and metal as continuous phase, and using nanometer sized metal, semiconductor, rigid particles and other inorganic particle, fiber, carbon nanotube modifier as dispersed phase, through appropriate preparation method of modified agent homogeneity of dispersion in the matrix material to form contains nanosize materials of the composite system, also known as nano materials. Carbon nanotube is a kind of ideal modified material, because the properties of high strength, elastic modulus, specific surface area, electrical conductivity, temperature stability and thermal conductivity, low thermal expansion coefficient and good resistance to acid and alkali it has. A method to prepare nanocomposites of tungsten carbide uniform dispersed carbon nanotube in tungsten to achieve mass and universal production. And the original properties of tungsten can remained and also improved.



Principle: Using the adsorption tungsten of carbon nanotube to restore nanocomposites tungsten carbide from ammonium paratungstate in the gas of hydrogen.

Steps as following:
1. Obtaining modified neutral carbon nanotube
Set carbon nanotube in concentrated nitric acid under 65-75℃, ultrasonic dispersion for 20-40min; then heated to 80 to 95℃ and reflux for 1 to 3 hours, after cooling down to room temperature, diluted in ionized water and filtered until the solution become neutral; drying the neutral particles in vacuum environment of 70-85℃ for 1.5 to 3 hours to modify the neutral carbon nanotube.
Remark: 1g carbon nanotube is obtained in 100 ml of concentrated nitric acid.

• < Prev
• Next >