DE2403366C2 - Verfahren zur Herstellung von mit einer Schutzschicht überzogenen ferromagnetischen Teilchen - Google Patents
Verfahren zur Herstellung von mit einer Schutzschicht überzogenen ferromagnetischen TeilchenInfo
- Publication number
- DE2403366C2 DE2403366C2 DE19742403366 DE2403366A DE2403366C2 DE 2403366 C2 DE2403366 C2 DE 2403366C2 DE 19742403366 DE19742403366 DE 19742403366 DE 2403366 A DE2403366 A DE 2403366A DE 2403366 C2 DE2403366 C2 DE 2403366C2
- Authority
- DE
- Germany
- Prior art keywords
- magnetic
- particles
- fatty acid
- ferromagnetic
- salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002245 particle Substances 0.000 title claims description 73
- 230000005294 ferromagnetic effect Effects 0.000 title claims description 47
- 238000000034 method Methods 0.000 title claims description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 230000008569 process Effects 0.000 title claims description 4
- 239000011241 protective layer Substances 0.000 title claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 45
- 229930195729 fatty acid Natural products 0.000 claims description 45
- 239000000194 fatty acid Substances 0.000 claims description 45
- 150000004665 fatty acids Chemical group 0.000 claims description 28
- 239000003960 organic solvent Substances 0.000 claims description 22
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
- 150000003839 salts Chemical class 0.000 claims description 17
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 7
- 229910000531 Co alloy Inorganic materials 0.000 claims description 6
- QVYYOKWPCQYKEY-UHFFFAOYSA-N [Fe].[Co] Chemical compound [Fe].[Co] QVYYOKWPCQYKEY-UHFFFAOYSA-N 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 150000004668 long chain fatty acids Chemical class 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 claims 1
- 125000000753 cycloalkyl group Chemical group 0.000 claims 1
- 230000005291 magnetic effect Effects 0.000 description 77
- 239000000843 powder Substances 0.000 description 53
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 36
- -1 fatty acid salt Chemical class 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 229910001004 magnetic alloy Inorganic materials 0.000 description 16
- 238000001035 drying Methods 0.000 description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 238000004381 surface treatment Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 7
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 6
- 239000002923 metal particle Substances 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 3
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 229910017061 Fe Co Inorganic materials 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- 239000005642 Oleic acid Substances 0.000 description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 3
- 239000000787 lecithin Substances 0.000 description 3
- 229940067606 lecithin Drugs 0.000 description 3
- 235000010445 lecithin Nutrition 0.000 description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052598 goethite Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 125000005480 straight-chain fatty acid group Chemical group 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- CZIBPNKKMSNWQH-UHFFFAOYSA-N (2-chloroquinolin-4-yl)-morpholin-4-ylmethanone Chemical compound C=12C=CC=CC2=NC(Cl)=CC=1C(=O)N1CCOCC1 CZIBPNKKMSNWQH-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 101100179594 Caenorhabditis elegans ins-4 gene Proteins 0.000 description 1
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- HZYCAKGEXXKCDM-UHFFFAOYSA-N Methyl 2-(methylthio)acetate Chemical compound COC(=O)CSC HZYCAKGEXXKCDM-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 description 1
- NVIVJPRCKQTWLY-UHFFFAOYSA-N cobalt nickel Chemical compound [Co][Ni][Co] NVIVJPRCKQTWLY-UHFFFAOYSA-N 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- HIYCTTVZYARBPQ-KVVVOXFISA-N cobalt;(z)-octadec-9-enoic acid Chemical compound [Co].CCCCCCCC\C=C/CCCCCCCC(O)=O HIYCTTVZYARBPQ-KVVVOXFISA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- GOYFNYXUQJJFHO-DWEHOVEISA-L disodium octadecanoate (Z)-octadec-9-enoate Chemical compound [Na+].[Na+].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCC\C=C/CCCCCCCC([O-])=O GOYFNYXUQJJFHO-DWEHOVEISA-L 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002496 gastric effect Effects 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 150000004687 hexahydrates Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- DEVYBOZJYUYBMC-KVVVOXFISA-N iron;(z)-octadec-9-enoic acid Chemical compound [Fe].CCCCCCCC\C=C/CCCCCCCC(O)=O DEVYBOZJYUYBMC-KVVVOXFISA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229960004232 linoleic acid Drugs 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 238000010303 mechanochemical reaction Methods 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 150000002888 oleic acid derivatives Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- MFBOGIVSZKQAPD-UHFFFAOYSA-M sodium butyrate Chemical compound [Na+].CCCC([O-])=O MFBOGIVSZKQAPD-UHFFFAOYSA-M 0.000 description 1
- UDWXLZLRRVQONG-UHFFFAOYSA-M sodium hexanoate Chemical compound [Na+].CCCCCC([O-])=O UDWXLZLRRVQONG-UHFFFAOYSA-M 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- BYKRNSHANADUFY-UHFFFAOYSA-M sodium octanoate Chemical compound [Na+].CCCCCCCC([O-])=O BYKRNSHANADUFY-UHFFFAOYSA-M 0.000 description 1
- IJRHDFLHUATAOS-DPMBMXLASA-M sodium ricinoleate Chemical compound [Na+].CCCCCC[C@@H](O)C\C=C/CCCCCCCC([O-])=O IJRHDFLHUATAOS-DPMBMXLASA-M 0.000 description 1
- CVYDEWKUJFCYJO-UHFFFAOYSA-M sodium;docosanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCCCC([O-])=O CVYDEWKUJFCYJO-UHFFFAOYSA-M 0.000 description 1
- KAINDVKDYLGBMI-UHFFFAOYSA-M sodium;hexacosanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCCCCCCCC([O-])=O KAINDVKDYLGBMI-UHFFFAOYSA-M 0.000 description 1
- GGXKEBACDBNFAF-UHFFFAOYSA-M sodium;hexadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCC([O-])=O GGXKEBACDBNFAF-UHFFFAOYSA-M 0.000 description 1
- MRQYKJNZWPCFNB-UHFFFAOYSA-M sodium;icosanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCC([O-])=O MRQYKJNZWPCFNB-UHFFFAOYSA-M 0.000 description 1
- ROYMYVICTPBXGZ-UHFFFAOYSA-M sodium;tetracosanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCCCCCC([O-])=O ROYMYVICTPBXGZ-UHFFFAOYSA-M 0.000 description 1
- JUQGWKYSEXPRGL-UHFFFAOYSA-M sodium;tetradecanoate Chemical compound [Na+].CCCCCCCCCCCCCC([O-])=O JUQGWKYSEXPRGL-UHFFFAOYSA-M 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/061—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Paints Or Removers (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Magnetic Record Carriers (AREA)
- Chemical Treatment Of Metals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016573A JPS547074B2 (enrdf_load_stackoverflow) | 1973-01-24 | 1973-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2403366A1 DE2403366A1 (de) | 1974-07-25 |
| DE2403366C2 true DE2403366C2 (de) | 1986-09-04 |
Family
ID=11742658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19742403366 Expired DE2403366C2 (de) | 1973-01-24 | 1974-01-24 | Verfahren zur Herstellung von mit einer Schutzschicht überzogenen ferromagnetischen Teilchen |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS547074B2 (enrdf_load_stackoverflow) |
| CA (1) | CA1017205A (enrdf_load_stackoverflow) |
| DE (1) | DE2403366C2 (enrdf_load_stackoverflow) |
| FR (1) | FR2214948B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1450241A (enrdf_load_stackoverflow) |
| IT (1) | IT1009585B (enrdf_load_stackoverflow) |
| NL (1) | NL181061C (enrdf_load_stackoverflow) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS554804B2 (enrdf_load_stackoverflow) * | 1975-03-22 | 1980-02-01 | ||
| JPS609322B2 (ja) * | 1976-07-13 | 1985-03-09 | 日立マクセル株式会社 | 磁気記録用金属磁性粉末の製造法 |
| JPS5629841A (en) * | 1979-08-12 | 1981-03-25 | Tdk Corp | Magnetic recording medium |
| US4305993A (en) * | 1979-10-09 | 1981-12-15 | Hitachi Maxell, Ltd. | Magnetic recording medium |
| JPS579802A (en) * | 1980-06-20 | 1982-01-19 | Dainippon Ink & Chem Inc | Metallic magnetic powder and its manufacture |
| JPS6036603A (ja) * | 1983-08-10 | 1985-02-25 | Dainippon Ink & Chem Inc | 比表面積の小さな微小金属磁性粉およびその製造方法 |
| JPH0643601B2 (ja) * | 1985-06-12 | 1994-06-08 | 戸田工業株式会社 | 金属鉄粒子粉末又は鉄を主成分とする合金磁性粒子粉末の製造法 |
| JPH0657182A (ja) * | 1992-07-06 | 1994-03-01 | Minnesota Mining & Mfg Co <3M> | 磁性塗料の製造方法 |
| CN115998158B (zh) * | 2022-12-29 | 2025-04-29 | 武汉苏泊尔炊具有限公司 | 一种不粘炊具及其制造方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD91017A (enrdf_load_stackoverflow) * | ||||
| FR1114250A (fr) * | 1953-12-02 | 1956-04-10 | Electro Chimie Soc D | Perfectionnements à la fabrication d'aimants permanents |
-
1973
- 1973-01-24 JP JP1016573A patent/JPS547074B2/ja not_active Expired
-
1974
- 1974-01-17 GB GB234474A patent/GB1450241A/en not_active Expired
- 1974-01-23 CA CA190,751A patent/CA1017205A/en not_active Expired
- 1974-01-24 DE DE19742403366 patent/DE2403366C2/de not_active Expired
- 1974-01-24 IT IT1975674A patent/IT1009585B/it active
- 1974-01-24 NL NL7401010A patent/NL181061C/xx not_active IP Right Cessation
- 1974-01-24 FR FR7402443A patent/FR2214948B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7401010A (enrdf_load_stackoverflow) | 1974-07-26 |
| GB1450241A (en) | 1976-09-22 |
| NL181061B (nl) | 1987-01-02 |
| FR2214948B1 (enrdf_load_stackoverflow) | 1978-03-24 |
| NL181061C (nl) | 1987-06-01 |
| JPS547074B2 (enrdf_load_stackoverflow) | 1979-04-03 |
| FR2214948A1 (enrdf_load_stackoverflow) | 1974-08-19 |
| IT1009585B (it) | 1976-12-20 |
| DE2403366A1 (de) | 1974-07-25 |
| JPS4997738A (enrdf_load_stackoverflow) | 1974-09-17 |
| CA1017205A (en) | 1977-09-13 |
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