Process for increasing the strength and electrical conductivity of graphite or carbon articles and/or for bonding such articles to each other to ceramic articles or to metals
Abstract
Abstract An impregnating composition for increasing the strength and electrical conduction of graphite and carbon articles, comprises 60-90 percent by volume furfurol or furfuryl alcohol, 5-20 percent by volume anthracene oil, and as a catalyst either 2 to 25 percent by volume phosphoric acid or 5 to 35 percent by volume of titanium ethyl ester. A bonding composition for impregnating and bonding graphite and carbon articles to each other and to ceramic articles and metals, comprises this impregnating composition in an amount 20 to 80 percent by weight, 1 to 15 percent by weight of boric acid or boric oxide, and the rest a filler, which can be TiC, TiB2, SiC, B4C, BN, CaO, Al2O3, powdered coke, graphite or a mixture thereof. To impregnate or bond, the impregnating composition or bonding composition is applied and the articles are heated at 80 to 250* C. for 2 to 10 hours, and then carbonized at 300* to 1,500* C.
Inventors
- 👤 Laszlo Kozar
- 👤 Mihaly Toth
- 👤 Jozsef Uveges
- 👤 Endre Pataki
- 👤 Sandor Kota
Bibliographic Details
Claims Analysis
Total Claims: 6References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |