Magneto-carbonization method for production of carbon fiber, and high performance carbon fibers made thereby
US9725829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jun 11, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/145
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Method for the preparation of carbon fiber from fiber precursor, wherein the fiber precursor is subjected to a magnetic field of at least 3 Tesla during a carbonization process. The carbonization process is generally conducted at a temperature of at least 400° C. and less than 2200° C., wherein, in particular embodiments, the carbonization process includes a low temperature carbonization step conducted at a temperature of at least or above 400° C. or 500° C. and less than or up to 1000° C., 1100° C., or 1200° C., followed by a high temperature carbonization step conducted at a temperature of at least or above 1200° C. In particular embodiments, particularly in the case of a polyacrylonitrile (PAN) fiber precursor, the resulting carbon fiber may possess a minimum tensile strength of at least 600 ksi, a tensile modulus of at least 30 Msi, and an ultimate elongation of at least 1.5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.