Method for preparing nano-size particulate graphite
US6692718B1 · kind B1 · utility
30Cited by
1References
13Claims
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Key dates
| Filing date | Feb 26, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Feb 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/949
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A multi-layer fullerene, particularly a carbon nano-onion which is nano-size particulate can be produced efficiently and in high purity by irradiating soot-like carbon such as carbon black obtained by incomplete combustion or thermal cracking of carbon-containing compound such as hydrocarbon, aromatic oil and so on with high energy such as electron rays, gamma rays, X-rays, beam from an ion source and so on, and heat-treated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.