| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dfb3b82c049ccbfc7a23fdd13ad1b888
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_928a17c5d50bb54a9b1b01b7ee603bef
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcd4fc7204591569731fe999a1a20783
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fdc3f1d133153e238d793b5e87172cf0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_59c1dbca94e2458385fd1c09d31f5743
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14055675a32b4d0a86fcd279a615fb1c |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-571 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B31-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-571
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G77-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-80 |
| filingDate |
1990-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2f21ce80ea82bae7debd148a61505740
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7daa6cc90b22949fca3528469ed55ff3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_687e427978f0128f2695e21bf5638ab2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0ffe1050720f581cf3f2b3f5243c3c21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e64d84ef76a58c9b3f9ebbb92ad15ed
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eba057d2672c18509ce8929936bb49ae |
| publicationDate |
1991-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2030082-A1 |
| titleOfInvention |
Preparation of substantially polycrystalline silicon carbide fibers from polyorganosiloxanes |
| abstract |
PREPARATION OF SUBSTANTIALLY POLYCRYSTALLINE SILICON CARBIDE FIBERS FROM POLYORGANOSILOXANES Abstract A process for the preparation of substantially polycrystalline silicon carbide fibers, and the product produced thereby, are provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperatures. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising phenyl-containing polyorganosiloxane 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/cm3. The polymeric precursor or the fibers contain, or have incorporated therein, at least about 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 |
1989-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |