http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108623308-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-612 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-3206 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-3418 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-3225 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-425 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-3217 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2235-6586 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-591 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-622 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-584 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-622 |
| filingDate | 2018-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108623308-B |
| titleOfInvention | Mother core for silicon nitride ball and production process thereof |
| abstract | The invention belongs to the field of inorganic non-metallic materials, and particularly relates to a mother core for a silicon nitride ball and a production process thereof. The mother core for the silicon nitride ball is prepared from the following raw materials in parts by weight: 40-60 parts of silicon powder; 1-3 parts of gas-phase nano silicon dioxide; 1-3 parts of graphite; 20-40 parts of alpha-silicon nitride powder; 1-4 parts of yttrium oxide; 1-8 parts of magnesium oxide; 1-8 parts of active alpha alumina powder. The invention utilizes the characteristic of hardening by nitriding in the sintering process of silicon nitride powder, overcomes the problem of abnormal hardness of the sintered silicon nitride powder by researching and developing a formula, combines the processes of preparing raw materials and preparing a mother core into a whole, does not need secondary batching, saves the cost of spray granulation, does not need mechanical pressing, adjusts the sintering process at the later stage, and ensures that the prepared mother core completely meets the production requirement and the performance of a silicon nitride sphere is also improved; the production process is scientific, reasonable, simple and feasible. |
| priorityDate | 2018-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.