http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H01219025-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6b55c79232b7a82f550a37f71412452f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01F1-11 |
| filingDate | 1988-02-26^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_43055e82294e016b89fe78a6f12b318b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff9ea61a88effbb2734f91af44fb8d05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78cb718c2adac852dc32e0865006396d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b14ab5ac1f8c984d023c961a366cb6e6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4bf7fb4a2fb008f51cc6bea95da6704f |
| publicationDate | 1989-09-01^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H01219025-A |
| titleOfInvention | Production of ferromagnetic iron oxide containing cobalt |
| abstract | PURPOSE: To obtain the subject magnetic iron oxide having excellent stability with time elapsed, fatty acid adsorbing property, orientation property, distribution of inversion magnetic field, by furthermore coating magnetic iron oxide powder coated with metallic compd. contg. Co and ferrous iron, obtd. by treating magnetic iron oxide powder under a specified condition, with one or more kinds of compds, of Si, Al, Ti, P, etc. n CONSTITUTION: The surface of magnetic iron oxide powder is coated with the metallic compds. contg. Co and ferrous iron, by adding an aq. soln. contg., e.g., Co salt (e.g., CoCl 2 ) and ferrous iron salt (e.g., FeCl 2 ) to a slurry dispersed with the magnetic iron oxide powder, thereafter, by adding an aq. alkaline soln. and by treating at room temp. - 100°C for 0.1-10hr, preferably in an inert gas atmosphere in the liq. regulated the concn. of OH group to 0.01-3mol/l, and then, the aq. dispersion is regulated its pH value to 6.5-9.5 and treated by heating at 80-160°C. Then, the obtd. heat-treated magnetic iron oxide contg. Co, etc., is further treated at room temp. - boiling point with an aq. soln. of one or more kinds of surface-treating compds. selected among Si, Al, Ca, Ti, V, Mn, Zn and P compds. and, as occasion demands, aged to coat with these compds. n COPYRIGHT: (C)1989,JPO&Japio |
| priorityDate | 1988-02-26^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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