http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2319021-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d4ada69388e0a1b68daaf536597c732 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-486 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-785 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-3895 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-5264 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-77 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-62281 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-571 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-571 |
| filingDate | 1991-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e4a2095130bf0f703eb074f73081a55a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6d735969de9e58174fea24c21a75c2f7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84eb0a2b1c13f6d81299a853fb0edbfb |
| publicationDate | 1998-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2319021-A |
| titleOfInvention | Preparation of substantially polycrystalline silicon carbide fibres |
| abstract | A process for the preparation of substantially polycrystalline silicon carbide fibers is carried out by initially forming fibers from a preceramic polymeric precursor comprising methylpolydisilylazane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600‹C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed by the process of the present invention have at least 75% crystallinity and have a density of at least about 2.9 gm/cc, and may be formed with small diameter and improved thermal stability. The polymeric precursor or the fibers contain, or have incorporated therein, at least 0.2% by weight boron. This incorporation of boron may be accomplished either prior to or during formation of the fibers or during at least one of the infusibilizing or pyrolyzing steps of the process. |
| priorityDate | 1990-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.