METHOD OF MANUFACTURING COMPOSITE POWDER MATERIAL FROM ALUMINIUM OXIDE CARBON NANOTUBES Russian patent published in 2019 - IPC B01J21/18 B01J21/04 C04B35/628 B82Y30/00 C30B25/00 

FIELD: nanotechnologies.

SUBSTANCE: present invention discloses a method for manufacturing a composite powdered material in the form of aluminium oxide carbon nanotubes. Method for producing includes the steps of: (1) preliminary preparation of aluminium oxide powder by drying and sieving, followed by placing the prepared powder in a chamber for chemical vapor deposition, vacuuming at 5–20 Pa, and also preheating to the reaction temperature; (2) rotation of the chemical vapor deposition chamber with a rotational speed of 15 to 60 rpm; (3) use of organometallic precursor as a raw material and its heating in the evaporator to 100–200 °C to obtain a gas mixture from the raw material, and the mass ratio of the organometallic precursor to aluminium oxide powder is from 1 to 3:5; (4) opening the evaporator valve, introducing the raw gas mixture into the chamber for chemical vapor deposition, as well as the simultaneous introduction of argon gas to split the organometallic precursor in order to precipitate metallic nanoparticles on aluminium oxide powder; (5) supplying carbon-containing gas in step (4) to a rotating chamber for chemical vapor deposition to provide an additional carbon source and generate a carbon nanotube by catalyzing metal nanoparticles and splitting carbon-containing gas, the carbon nanotube is distributed over the surface of aluminum oxide and metal particles to obtain a clad powder; (6) stopping the rotation of the chemical vapor deposition chamber at the end of the reaction, closing the evaporator valve, cooling to room temperature and removing the clad powder; and (7) sifting the powder obtained in step (6).

EFFECT: this method is characterized by simplicity and a short production period, and the resulting carbon nanotube from nanoparticles of aluminum oxide and metal is evenly distributed and has the prospect of application in many areas of technology, such as conductive ceramics and catalytic materials.

8 cl, 2 dwg, 4 ex