http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DD-297035-A5
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_928e0186e9c4713ef1e027dd6acbd542 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J1-05 |
| filingDate | 1989-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_09a72c50c13fbe8895853150ea71d1b1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eacb58b72646de533566ce2b3dc1d2ee http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79d2227f64b222d65c656511a232fcdf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2e6f7e762d98c3a32ccfbfc30f5a7ff |
| publicationDate | 1991-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DD-297035-A5 |
| titleOfInvention | ELECTRODE OF HIGH-MELTING METAL |
| abstract | The invention relates to electrodes of refractory metals with emitter additives, in particular electrodes for gas discharge lamps. The use of these electrodes is recommended in thermally highly loaded pulse discharge lamps. The aim of the invention is to produce life-prolonging electrodes with increased luminous efficacy of the gas discharge lamps with a cost-effective method. The invention has for its object to achieve finely crystalline structure of the electrode material, a homogeneous finely dispersed distribution of the emitter material, a large sintering activity of the metal powder to avoid the use of sintering activators with their sometimes negative consequences and the increase in light intensity by special additives. According to the invention, the object is achieved by using the metals tungsten and / or molybdenum and / or tantalum as ammonium metal oxide hydrates or ammonium metal oxide having a specific surface of 0.40 to 0.85 m 2 / g and a FUK value of 7 to 18 mm , To increase the light intensity of the gas discharge lamps potassium and potassium aluminosilicates are added. Preferably, ammonium paratungstate of the formula 5 (NH 4) 2 O 12 WO 35 H 2 O is used. Suitable emitter materials are rare earth oxides, preferably yttrium oxide or lanthanum oxide, cerium oxide or alkaline earth compounds, such as barium, calcium, strontium oxides, carbonates or nitrates or mixtures of these compounds with thorium oxide. The finely crystalline starting material ensures a high sintering activity of the powder, so that the use of sinter activators is not required. Material; refractory metals; Discharge; Pulse discharge lamps} |
| priorityDate | 1989-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.