http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DD-216179-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_652510b094029b542f14751bf3246a8a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-12 |
| filingDate | 1983-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45bf18ff21db97df372484587d9c1d73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2cfdcbbc534c6f8f044bbaa3aeddb484 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_26babaa0f6a3143729f7fb3b5b86246b |
| publicationDate | 1984-12-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DD-216179-A1 |
| titleOfInvention | METHOD FOR INFUSE OF WASHED GOPTIC TREATED TUNGSTEN |
| abstract | The invention relates to a method for sintering washed-out doped tungsten powder, in which the grain growth is controlled during the sintering process by mixing differently washed tungsten powder. For this purpose, the doped tungsten powder, which is prepared in a known manner by Antirenkung of tungsten (VI) oxide or "blue" tungsten oxide with aqueous solutions of potassium, silicon and aluminum compounds and subsequent reduction in the hydrogen stream u. in which the doping elements are of the order of 1500 to 4000 ppm potassium, 500 to 2000 ppm silicon and 50 to 300 ppm aluminum, extracted first at room temperature with water to the present as potassium tungstate in tungsten powder doping excess, which for the formation remove the recrystallization controlling potassium gas bubbles to achieve a creep-resistant Gefueges in the material is ineffective, and then treat part of the water-washed tungsten powder with acidic or alkaline solutions and wash neutral with water to the remaining ineffective doping excess of potassium, silicon and Remove aluminum as far as possible. The washed-out tungsten powder fractions produced in this way are processed either individually or in mixtures of different proportions by pressing and sintering to form bodies and subsequently to lamp wire. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AT-391434-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-116352100-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-116352100-A |
| priorityDate | 1983-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.