Process for producing graphite blocks
US4983244A · kind A · utility
13Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1048
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Graphite blocks are produced by a process wherein one or plural polymer films having a thickness of from 1 to 400 .mu.m and selected from aromatic polyimides, aromatic polyamides and polyoxadiazoles are heat treated to obtain carbonaceous films. A plurality of the carbonaceous films are hot pressure under certain conditions to obtain thick graphite blocks. The blocks have a remarkably improved rocking characteristic and are useful as radiation optical elements such as X-ray or neutron ray monochromators or filters. The blocks may be curved to obtain bent-type graphite articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.