Method for fabricating carbon nanotube yarn
US7045108B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 31, 2002 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Oct 23, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2958
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of fabricating a long carbon nanotube yarn includes the following steps: (1) providing a flat and smooth substrate; (2) depositing a catalyst on the substrate; (3) positioning the substrate with the catalyst in a furnace; (4) heating the furnace to a predetermined temperature; (5) supplying a mixture of carbon containing gas and protecting gas into the furnace; (6) controlling a difference between the local temperature of the catalyst and the furnace temperature to be at least 50° C.; (7) controlling the partial pressure of the carbon containing gas to be less than 0.2; (8) growing a number of carbon nanotubes on the substrate such that a carbon nanotube array is formed on the substrate; and (9) drawing out a bundle of carbon nanotubes from the carbon nanotube array such that a carbon nanotube yarn is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.