http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H06340426-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03d0f52bb4069f8a19d70dcfb697c67a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-706 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-738 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D5-23 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-02 |
| filingDate | 1993-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a98e8f2ea296837312f1cfcda6048c4d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b26ad119e8a77bf1714bf4eea69726f6 |
| publicationDate | 1994-12-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H06340426-A |
| titleOfInvention | Method for producing hematite particles, method for producing ferromagnetic powder for magnetic recording using the hematite particles, and magnetic recording medium |
| abstract | (57) [Abstract] [Purpose] A method for producing monodisperse spindle-type hematite particles with a very small particle size distribution, which are useful as pigments, paints, ferromagnetic powders for magnetic recording media, etc., and ferromagnetism using these hematite particles. A powder manufacturing method and a magnetic recording medium are provided. [Structure] Fine particles of hematite are used as nuclei, and ferric hydroxide is hydrolyzed in the presence of sulfate ion or phosphate ion to obtain the above-mentioned monodisperse spindle hematite particles. Further, the monodisperse spindle type hematite particles are reduced to magnetite, which can be oxidized or reduced to obtain a ferromagnetic powder having excellent magnetic properties. It is possible to obtain a magnetic recording medium which has a good ratio and SFD and is particularly excellent in output in the short wavelength region. In this case, further excellent ferromagnetic powder can be obtained by annealing the hematite or magnetite. be able to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7041398-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109775763-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109775763-A |
| priorityDate | 1993-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 117.