Artificial graphite
US4217336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1978 |
| Grant date | Aug 12, 1980 |
| Priority date | — |
| Expiry date | Jun 2, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/52
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dual-textured graphite has been produced having an apparent coarse strongly bonded grained structure (the macrotexture) in which each coarse grain is formed from a number of strongly linked ultrafine grains (the microtexture). The dimensions of the coarse grains are from 0.4 to 6.0 m.m. while those of the ultrafine grains are below 0.050 m.m. The fine grains are linked by graphitized pore-containing carbon having pores of less than 2.mu. diameter. The coarse grains are also linked by graphitized pore-containing carbon having pores of from 5 to 20.mu. diameter. Further characteristics of the graphite are a coefficient of linear expansion of 4-6.times.10.sup.-6 /.degree. C., thermal conductivity of 0.20 cal/cm/.degree. C./sec., electrical resistivity of 1500-2000.mu. ohms/cm and anisotropy factor not exceeding 1.4. A process for producing such product from pitch and petroleum or coal tar coke is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.