DE3132677A1 - Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraeger - Google Patents
Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraegerInfo
- Publication number
- DE3132677A1 DE3132677A1 DE19813132677 DE3132677A DE3132677A1 DE 3132677 A1 DE3132677 A1 DE 3132677A1 DE 19813132677 DE19813132677 DE 19813132677 DE 3132677 A DE3132677 A DE 3132677A DE 3132677 A1 DE3132677 A1 DE 3132677A1
- Authority
- DE
- Germany
- Prior art keywords
- ferrite
- mixture
- magnetic
- solution
- recording media
- 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.)
- Withdrawn
Links
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 33
- 229910001868 water Inorganic materials 0.000 claims abstract description 32
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 26
- 239000011780 sodium chloride Substances 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 8
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical group [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052788 barium Inorganic materials 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 229910052712 strontium Chemical group 0.000 claims abstract description 5
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical group [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 4
- 239000010941 cobalt Substances 0.000 claims abstract description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 239000011701 zinc Substances 0.000 claims abstract description 4
- 238000002386 leaching Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 33
- 238000001556 precipitation Methods 0.000 claims description 17
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 8
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 4
- 229910001631 strontium chloride Inorganic materials 0.000 claims description 3
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 claims description 3
- 229910001626 barium chloride Inorganic materials 0.000 claims description 2
- 238000005496 tempering Methods 0.000 abstract description 8
- 239000011833 salt mixture Substances 0.000 abstract description 4
- 238000000975 co-precipitation Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- 229910021645 metal ion Inorganic materials 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 37
- 239000000843 powder Substances 0.000 description 28
- 235000002639 sodium chloride Nutrition 0.000 description 25
- 239000002245 particle Substances 0.000 description 21
- 238000003756 stirring Methods 0.000 description 20
- 238000009826 distribution Methods 0.000 description 16
- 239000000725 suspension Substances 0.000 description 14
- 239000013078 crystal Substances 0.000 description 13
- 235000017550 sodium carbonate Nutrition 0.000 description 11
- 238000001816 cooling Methods 0.000 description 9
- 239000012071 phase Substances 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 229910010066 TiC14 Inorganic materials 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 4
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- -1 B203 Chemical class 0.000 description 2
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 229910003074 TiCl4 Inorganic materials 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- IEPRKVQEAMIZSS-UHFFFAOYSA-N Di-Et ester-Fumaric acid Natural products CCOC(=O)C=CC(=O)OCC IEPRKVQEAMIZSS-UHFFFAOYSA-N 0.000 description 1
- IEPRKVQEAMIZSS-WAYWQWQTSA-N Diethyl maleate Chemical compound CCOC(=O)\C=C/C(=O)OCC IEPRKVQEAMIZSS-WAYWQWQTSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- 229910001047 Hard ferrite Inorganic materials 0.000 description 1
- 229910018965 MCl2 Inorganic materials 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- LDCRTTXIJACKKU-ARJAWSKDSA-N dimethyl maleate Chemical compound COC(=O)\C=C/C(=O)OC LDCRTTXIJACKKU-ARJAWSKDSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 description 1
- QGPQTSCLUYMZHL-UHFFFAOYSA-N iron(3+);oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Fe+3].[Fe+3] QGPQTSCLUYMZHL-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000012046 mixed solvent Substances 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
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0036—Mixed oxides or hydroxides containing one alkaline earth metal, magnesium or lead
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0063—Mixed oxides or hydroxides containing zinc
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/009—Compounds containing iron, with or without oxygen or hydrogen, and containing two or more other elements
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G51/00—Compounds of cobalt
- C01G51/80—Compounds containing cobalt, with or without oxygen or hydrogen, and containing one or more other elements
- C01G51/82—Compounds containing cobalt, with or without oxygen or hydrogen, and containing two or more other elements
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/80—Compounds containing nickel, with or without oxygen or hydrogen, and containing one or more other elements
- C01G53/82—Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements
-
- 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
- H01F1/12—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 soft-magnetic materials
- H01F1/34—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 soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/36—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 soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Geology (AREA)
- General Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Soft Magnetic Materials (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813132677 DE3132677A1 (de) | 1981-08-19 | 1981-08-19 | Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraeger |
| EP82106387A EP0072436B1 (de) | 1981-08-19 | 1982-07-16 | Verfahren zur Herstellung feinteiliger Ferritpulver |
| DE8282106387T DE3273566D1 (en) | 1981-08-19 | 1982-07-16 | Process for the preparation of finely divided ferrite powder |
| JP57141193A JPS5841727A (ja) | 1981-08-19 | 1982-08-16 | 微細なフエライト粉末の製造方法 |
| US06/408,599 US4664831A (en) | 1981-08-19 | 1982-08-16 | Preparation of finely divided ferrite powders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813132677 DE3132677A1 (de) | 1981-08-19 | 1981-08-19 | Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraeger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3132677A1 true DE3132677A1 (de) | 1983-03-17 |
Family
ID=6139583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19813132677 Withdrawn DE3132677A1 (de) | 1981-08-19 | 1981-08-19 | Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraeger |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5841727A (enrdf_load_stackoverflow) |
| DE (1) | DE3132677A1 (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0223050A3 (de) * | 1985-10-23 | 1988-11-23 | Bayer Ag | Feinteilige isometrische Hexaferritpigmente, Verfahren zu ihrer Herstellung und deren Verwendung |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60143429A (ja) * | 1983-12-29 | 1985-07-29 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
| JPH0619829B2 (ja) * | 1984-02-07 | 1994-03-16 | 日立マクセル株式会社 | 磁気記録媒体 |
| JPS60211904A (ja) * | 1984-04-06 | 1985-10-24 | Ricoh Co Ltd | 金属酸化物磁性体及び磁性膜 |
| JP5097971B2 (ja) * | 2006-09-05 | 2012-12-12 | Ｄｏｗａエレクトロニクス株式会社 | 電波吸収体用磁性粉体の製造法 |
| US10049796B2 (en) * | 2014-10-24 | 2018-08-14 | Skyworks Solutions, Inc. | Magnetodielectric Y-phase strontium hexagonal ferrite materials formed by sodium substitution |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5635613A (en) * | 1979-08-28 | 1981-04-08 | Mitsubishi Electric Corp | Method and device for separating insulating film of magnet wire |
| JPS5660002A (en) * | 1979-10-19 | 1981-05-23 | Toshiba Corp | Manufacture of high density recording magnetic powder |
| JPS5673698A (en) * | 1979-11-21 | 1981-06-18 | Toda Kogyo Corp | Manufacture of magnetoplumbite type composite ferrite particle powder assuming hexagonal plate form |
| JPS57141194A (en) * | 1981-02-26 | 1982-09-01 | Sony Corp | Demodulating circuit for pal system color television signal |
-
1981
- 1981-08-19 DE DE19813132677 patent/DE3132677A1/de not_active Withdrawn
-
1982
- 1982-08-16 JP JP57141193A patent/JPS5841727A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0223050A3 (de) * | 1985-10-23 | 1988-11-23 | Bayer Ag | Feinteilige isometrische Hexaferritpigmente, Verfahren zu ihrer Herstellung und deren Verwendung |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0359007B2 (enrdf_load_stackoverflow) | 1991-09-09 |
| JPS5841727A (ja) | 1983-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0072436B1 (de) | Verfahren zur Herstellung feinteiliger Ferritpulver | |
| EP0072437B1 (de) | Verfahren zur Herstellung feinteiliger Ferritpulver | |
| EP0014902B1 (de) | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid | |
| DE2202853A1 (de) | Verfahren zur herstellung von feinteiligen, nadelfoermigen, magnetischen eisenoxiden | |
| EP0176919A2 (de) | Verfahren zur Herstellung von feinteiligem isotropen Ferritpulver mit Spinellstruktur | |
| EP0014903B1 (de) | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid | |
| EP0052210B1 (de) | Verfahren zur Herstellung von feinteiligem hochkoerzitivem Bariumferrit | |
| EP0276765A2 (de) | Feststoff zur Herstellung hexagonaler Ferrite | |
| EP0237944B1 (de) | Verfahren zur Herstellung von nadelförmigem alpha-Eisen-III-Oxid | |
| DE2705967C2 (de) | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid | |
| EP0203470B1 (de) | Verfahren zur Herstellung feinteiliger und nadelförmiger hexagonaler Ferrite sowie ihre Verwendung zur Herstellung magnetischer Aufzeichnungsträger und Plastoferrite | |
| EP0091640B1 (de) | Verfahren zur Herstellung von Ferriten aus Eisen(II)-Sulfat | |
| DE3132677A1 (de) | Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraeger | |
| DE3729497A1 (de) | Magnetisches pulver fuer magnetische aufzeichnungen | |
| DE3788111T2 (de) | Plättchenförmige Ferritteilchen vom Magnetoplumbittyp für magnetische Aufzeichnung und Verfahren zur Herstellung derselben. | |
| DE3729693A1 (de) | Verfahren zur herstellung feiner bariumferritteilchen | |
| EP0164533B1 (de) | Verfahren zur Herstellung feinteiliger, nadelförmiger und hochkoerzitiver hexagonaler Ferrite | |
| DE2428875A1 (de) | Verfahren zur herstellung von gammaeisen(iii)oxid | |
| DE3041960A1 (de) | Verfahren zur herstellung eines magnetpulvers fuer die magnetaufzeichnung mit hoher dichte | |
| DE3132678A1 (de) | Verfahren zur herstellung feinteiliger hexagonaler ferrite sowie ihre verwendung zur herstellung magnetischer aufzeichnungstraeger | |
| EP0024692A2 (de) | Verfahren zur Herstellung nadelförmiger ferromagnetischer Eisenteilchen und deren Verwendung | |
| DE2320182C2 (de) | Verfahren zur Herstellung fester Lösungen aus mit einem oder mehreren zweiwertigen Metallen homogen substituiertem γ-Fe 2 O 3 und dessen Anwendung | |
| EP0160877B1 (de) | Verfahren zur Herstellung von feinteiligem isotropem kobalthaltigem Ferritpulver | |
| DE68907696T2 (de) | Verfahren zur Herstellung von magnetischen Teilchen aus Hexaferrit, gewonnene Teilchen und diese enthaltende Produkte. | |
| DE68925157T2 (de) | Plättchenförmige feine Ferritteilchen, geeignet zur Verwendung bei magnetischer Aufzeichnung und Verfahren zur Herstellung derselben |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8130 | Withdrawal |