Carbon materials comprising carbon nanotubes and methods of making carbon nanotubes
US9969619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2011 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Mar 28, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to carbon materials comprising carbon nanotubes, powders comprising carbon nanotubes and methods of making carbon nanotubes. In the methods of the present invention, the size and/or formation of floating catalyst particles is closely controlled. The resulting carbon nanotubes typically exhibit armchair chirality and typically have metallic properties. The carbon nanotubes produced by this method readily form bulk materials, which typically have a conductivity of at least 0.7×106 Sm″1 in at least one direction. The invention has particular application to the manufacture of components such as electrical conductors. Suitable electrical conductors include wires (e.g. for electrical motors) and cables (e.g. for transmitting electrical power).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.