http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103834400-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ae04510d999a5dee3acbd0cc622984a1 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K11-68 |
| filingDate | 2014-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ffac9d34ae54241624104d8e919c7f7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f42905f279d3f711b9145a4a7d25df1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ea3f05880797efc31d21d2f326c1b259 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b194b1b499d5f610e4c903fcc141d83b |
| publicationDate | 2015-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103834400-B |
| titleOfInvention | Calcium tungstate fluorescent powder and preparation method thereof |
| abstract | The invention discloses calcium tungstate fluorescent powder excited by near ultraviolet rays or blue rays and a preparation method thereof, and relates to a fluorescent powder material which emits olivine and orange rays and a preparation method thereof. The preparation method comprises the following steps: by taking praseodymium oxide, samarium oxide, sodium tungstate and anhydrous calcium chloride as raw materials, preparing the olivine and orange fluorescent powder excited by near ultraviolet rays or blue rays by a coprecipitation/sintering method, and providing the optimal doping concentration during single doping and double doping; and successfully preparing required single-doped Pr and double-doped Pr, Sm CaWO4 powder crystals. The luminescence property of the fluorescent powder is improved by a chemical doping method. The fluorescent powder is simple in preparation process, low in cost, easy to control the preparation conditions and short in synthetic period, and the raw materials are refined and uniformly mixed. The fluorescent powder has the characteristics of good product performance and the like. The calcium tungstate fluorescent powder is suitable for LEDs (Light Emitting Diodes) which are excited by near ultraviolet rays or blue rays to emit olivine and orange rays or mixed with other materials to form white light. |
| priorityDate | 2014-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.