http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111790915-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F9-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F9-22 |
| filingDate | 2020-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111790915-B |
| titleOfInvention | Preparation method of potassium-doped superfine low-potassium tungsten powder |
| abstract | The invention discloses a preparation method of potassium-doped superfine low-potassium tungsten powder, which comprises the steps of taking ammonium paratungstate as a raw material, carrying out primary reduction to prepare blue tungsten, doping silicon, aluminum and potassium elements in the blue tungsten, carrying out secondary reduction to prepare tungsten dioxide, carrying out tertiary reduction on the tungsten dioxide to generate superfine low-potassium tungsten powder, and carrying out acid washing to obtain the tungsten powder with the average potassium content of 20-40 ppm, the silicon content of 200-400 ppm, the aluminum content of 10-20 ppm and the tungsten powder particle size of 1.0-1.5 mu m. The preparation method can ensure the effective potassium content in the tungsten crystal lattice, has good forming and sintering properties, is beneficial to later forging processing, and is suitable for large-scale production of potassium-containing tungsten bars and plates. |
| priorityDate | 2020-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.