http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4990471-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9b92383ffedfb6d274424d600c7d2a6a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-0685 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-068 |
| filingDate | 1988-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1991-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b73e08be04139aac3e9c4a4407c5fe0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78af5159948e3814c22ec99b7aaff5dc |
| publicationDate | 1991-02-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4990471-A |
| titleOfInvention | Process for producing silicon nitride |
| abstract | A process for forming silicon nitride containing little or no silicon carbide. The process involves producing a uniform dispersion of finely divided silica particles in a polymer, heating the polymer/silica dispersion in a non-oxidizing atmosphere to carbonize the polymer, and heating the resulting carbonized product to a temperature in the range of 1300 DEG -1800 DEG C. in a non-oxidizing nitrogen-containing atmosphere. This latter heating step is carried out in the presence of a metal oxide (preferably alumina which is capable, in the reaction conditions, of reducing the amount of silicon carbide formed as an undesired by-product. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6528436-B1 |
| priorityDate | 1988-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.