http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H06124827-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5fb9798bf05293ffe6d2e0fde58c3cdb |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01F1-112 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-00 |
| filingDate | 1991-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba53bd9f096deccccda4b8e31c6fa341 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_80573e350bb3b529b9a361af9ecb0a91 |
| publicationDate | 1994-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H06124827-A |
| titleOfInvention | Method for producing cobalt-coated magnetic iron oxide particles |
| abstract | (57) [Summary] (Modified) [Purpose] High coercive force suitable for magnetic iron oxide particles for high density recording, good coercive force distribution and squareness ratio, and blackness And a method for industrially obtaining a cobalt-adhered magnetic iron oxide particle powder, which is excellent in chemical stability and magnetic stability over time. An aqueous alkaline hydroxide solution is added to an aqueous dispersion of acicular magnetite particles to form an alkaline suspension, and the suspension is ferrous salt aqueous solution in a temperature range of 40 to 60 ° C. under a non-oxidizing atmosphere. Is added and stirred to form a magnetite layer on the surface of the acicular magnetite particles, then an aqueous cobalt salt solution is added, and the mixture is heated and stirred to form a spinel type ferrite layer on the magnetite layer, and then, The surface of the spinel type ferrite layer is oxidized by heating and stirring the suspension in an oxidizing atmosphere. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103896342-A |
| priorityDate | 1991-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.