http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103601481-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ecd57632bde5eff12c6e7b605b9c8652 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-26 |
| filingDate | 2013-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2a73a4e518ac847472f1faa25ba2e13 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92822fb95cf755076f77c1102f0fc9fb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9f36cc0e77e23b58151d7f73c8b949bf |
| publicationDate | 2015-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103601481-B |
| titleOfInvention | Preparation method of novel rare earth co-doped FB9 permanent magnet used for variable frequency motor |
| abstract | The invention relates to a preparation method of a novel rare earth co-doped FB9 permanent magnet used for a variable frequency motor. A main raw material of the permanent magnet is a permanent magnet material having a chemical formula of Sr[1-x]Ba[x]Zn[y]Fe[12-y]O[19], wherein the x is 0.3-0.35 and the y is 1.5-2.5. The method comprises steps of (1) preparing Sr[1-x]Ba[x]Zn[y]Fe[12-y]O[19] powder; (2) preparing materials; (3) performing wet ball milling; (4) preparing a workblank; and (5) sintering. According to the permanent magnet prepared by the method, barium is added to replace a portion of strontium and zinc is used to replace a portion of iron in the main material so as to improve the magnetic performances of the material. A combustion method is used in the preparation step of the main material so that the purity of the prepared material is high. Sintering auxiliary agents comprising calcium carbonate and sodium borate are added into the wet ball milling step to improve the microscope property after the sintering step and to improve orientation performances of the magnet. Rare earth element oxides comprising dysprosium oxide, niobium oxide and cobaltous oxide are added to further improve coercive force and the magnetic energy product of the material. |
| priorityDate | 2013-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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