| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6402b23ab8782152be47b3996e48a4a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_819b3a0c84b60f6435a38aaf65be3269 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2002-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-583
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-0648
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-064 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-583
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-064 |
| filingDate |
1985-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_356a0bc1d61b15ece52a50a28ab298c7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d79b68a0286325c9f6c48a7dc551c29e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cc387ce2bac133c39d35f813082ebe78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6d32c4ea97d096f4ca1322a05ed9ba5c |
| publicationDate |
1986-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0170817-A2 |
| titleOfInvention |
A high-purity powder of hexagonal boron nitride and a method for the preparation thereof |
| abstract |
The invention provides a method for the preparation of an upgraded high-purity powder of hexagonal boron nitride still having low crystallinity to retain activity for sintering. The first method comprises the steps of admixing a crude powder of hexagonal boron nitride with a carbonaceous material and heating the blend in a stream of an inert gas. The second method comprises the steps of admixing the powdery blend of boric acid or boron oxide as the boron source and a nitrogen compound as the nitrogen source with borax or anhydrous borax, heating the powdery blend to form a crude powder of hexagonal boron nitride, admixing the crude powder of hexagonal boron nitride with a carbonaceous powder, and heating the powdery blend at a temperature of 1300 °C or higher in a stream of an inert gas. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0432007-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1053973-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6348179-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2655638-A1 |
| priorityDate |
1984-06-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |