http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DD-227727-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_62b563909ed77d94afc3c237e0fbd935 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-36 |
| filingDate | 1984-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_580d2bb61596d7fb7c8e625ff5ce672c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_095eba4302823f248ef3672713bbcf4c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dee556cc85e9abc044a31068763aeabe http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a2d76f232b8ec91096248f0d221d8f7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bc54a2000fbf6b04b8fb85992e5f65e2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f3af08fd20b749d6e5f628963c83f3e7 |
| publicationDate | 1985-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DD-227727-A1 |
| titleOfInvention | ANTRA-CHARACTERIZATION METHOD FOR THE PRODUCTION OF COPIED TREATED TUNGSTEN |
| abstract | The invention relates to a Antraenkverfahren for the production of gedoptem tungsten powder for the lamp industry, in which are added to an aqueous suspension of tungsten (VI) oxide or "blue tungsten oxide" at a temperature between 10C and 90C aqueous solutions containing at least two different Heteropolywolframverbindungen , Of these, at least one has two different doping elements, potassium and silicon or potassium and aluminum or silicon and aluminum. A solution of a potassium, silicon, aluminum, tungsten, oxygen and hydrogen containing heteropoly compound and dodecatungstoic acid or a solution of an aluminous heteropolytungsten compound in an aqueous potassium silicate solution may also be used. After addition of all doping element compounds, the aqueous suspension is brought to the dry dust at 50 ° C to 150 ° C. From the doped tungsten (VI) oxide or doped "blue tungsten oxide", the doped tungsten powder is obtained by reduction by means of hydrogen, in which the doping elements in the order of 400 to 3,500 ppm K, from 200 to 2,500 ppm Si and 50 to 500 ppm Al are present. The doped tungsten powder is washed out in a known manner in order to remove the doping excess as far as possible. The tungsten powders produced in this way are processed by molding and sintering into shaped bodies and subsequently into lamp wire. |
| priorityDate | 1984-08-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.