Process for production of graphite flakes and films via low temperature pyrolysis
US5143709A · kind A · utility
41Cited by
8References
13Claims
0Family size
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Key dates
| Filing date | Jan 10, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Jan 10, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Electrically conductive carbon flakes and films are prepared in high yield by the pyrolysis of cyclic aromatic hydrocarbons, optionally halogenated, in the presence of a dehydrogenating agent at about at least 800.degree. C. Flakes of thicknesses up to 20 .mu.m and lengths up to 1 cm on a side are metal-like in appearance and have a conductivity of about 200-300 S/cm at room temperature. By heat treatment to 2600.degree. C., graphitic order is improved and the conductivity rises to .apprxeq.10000-15000 S/cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.