http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112222418-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F2003-1051 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y40-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B32-949 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-1007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F9-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B32-949 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F9-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B82Y40-00 |
| filingDate | 2020-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112222418-B |
| titleOfInvention | Method for preparing nano tungsten powder by regulating nucleation and growth processes and application |
| abstract | The invention discloses a method for preparing nano tungsten powder by regulating nucleation and growth processes, which comprises the following steps: firstly, crushing and dispersing nanocrystalline tungsten trioxide, and then uniformly mixing the tungsten trioxide with carbon nano particles to obtain composite powder; secondly, performing primary hydrogen reduction on the composite powder to obtain a mixture; thirdly, performing two-stage reduction on the mixture to obtain nano tungsten powder; the invention also discloses the application of the nano tungsten powder in the preparation of fine-grain/ultra-fine-grain tungsten-based alloy by sintering and the preparation of ultra-fine/nano tungsten carbide powder by carbonization. The method effectively regulates and controls WO by adjusting the mixing degree of the nanocrystalline tungsten trioxide and the carbon nanoparticles and controlling the conditions of first-stage hydrogen reduction and second-stage reduction 3 The W is reduced to the nucleation and growth process, the nucleation rate of the tungsten is improved, the granularity of the tungsten powder is reduced, the growth of the tungsten powder is promoted, the process is simple, the cost is lower, and the method is suitable for large-scale industrialized production of the nano tungsten powder; the invention has wide application range, effectively improves the density of the tungsten-based alloy and improves the performance of the tungsten-based alloy. |
| priorityDate | 2020-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.