JPS59207024A - 磁気記録媒体 - Google Patents
磁気記録媒体Info
- Publication number
- JPS59207024A JPS59207024A JP58081072A JP8107283A JPS59207024A JP S59207024 A JPS59207024 A JP S59207024A JP 58081072 A JP58081072 A JP 58081072A JP 8107283 A JP8107283 A JP 8107283A JP S59207024 A JPS59207024 A JP S59207024A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- magnetic
- powder
- recording medium
- differential thermal
- 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.)
- Granted
Links
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- 229910052751 metal Inorganic materials 0.000 claims description 56
- 239000002184 metal Substances 0.000 claims description 56
- 238000000034 method Methods 0.000 abstract description 35
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 150000001875 compounds Chemical class 0.000 abstract description 13
- 230000003647 oxidation Effects 0.000 abstract description 11
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- 239000000654 additive Substances 0.000 abstract description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910052759 nickel Inorganic materials 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 6
- 229910001297 Zn alloy Inorganic materials 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 229910000531 Co alloy Inorganic materials 0.000 abstract description 2
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 1
- 229910017709 Ni Co Inorganic materials 0.000 abstract 1
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 1
- 229910003267 Ni-Co Inorganic materials 0.000 abstract 1
- 229910003262 Ni‐Co Inorganic materials 0.000 abstract 1
- 238000005275 alloying Methods 0.000 abstract 1
- 238000010348 incorporation Methods 0.000 abstract 1
- 239000003973 paint Substances 0.000 description 19
- 239000011230 binding agent Substances 0.000 description 18
- 230000005415 magnetization Effects 0.000 description 15
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000002270 dispersing agent Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 125000004429 atom Chemical group 0.000 description 6
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 5
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
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- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Chemical group OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-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 2
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- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
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- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
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- 238000010894 electron beam technology Methods 0.000 description 2
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- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
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- 239000000787 lecithin Substances 0.000 description 2
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- 229940067606 lecithin Drugs 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
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- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
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- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- RQMWVVBHJMUJNZ-UHFFFAOYSA-N 4-chloropyridin-2-amine Chemical group NC1=CC(Cl)=CC=N1 RQMWVVBHJMUJNZ-UHFFFAOYSA-N 0.000 description 1
- 229910000714 At alloy Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical group OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OWNRRUFOJXFKCU-UHFFFAOYSA-N Bromadiolone Chemical compound C=1C=C(C=2C=CC(Br)=CC=2)C=CC=1C(O)CC(C=1C(OC2=CC=CC=C2C=1O)=O)C1=CC=CC=C1 OWNRRUFOJXFKCU-UHFFFAOYSA-N 0.000 description 1
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- 241000221535 Pucciniales Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical class NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium group Chemical group [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- PJANXHGTPQOBST-VAWYXSNFSA-N trans-stilbene Chemical group C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 125000004417 unsaturated alkyl group Chemical group 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70605—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
- Y10T428/257—Iron oxide or aluminum oxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31609—Particulate metal or metal compound-containing
Landscapes
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58081072A JPS59207024A (ja) | 1983-05-10 | 1983-05-10 | 磁気記録媒体 |
| EP84303179A EP0125150B2 (en) | 1983-05-10 | 1984-05-10 | Magnetic recording medium |
| DE8484303179T DE3484322D1 (de) | 1983-05-10 | 1984-05-10 | Magnetisches aufzeichnungsmedium. |
| US07/028,023 US4844977A (en) | 1983-05-10 | 1987-03-17 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58081072A JPS59207024A (ja) | 1983-05-10 | 1983-05-10 | 磁気記録媒体 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9043589A Division JPH02132631A (ja) | 1989-04-10 | 1989-04-10 | 磁気記録媒体 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59207024A true JPS59207024A (ja) | 1984-11-24 |
| JPS6322366B2 JPS6322366B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1988-05-11 |
Family
ID=13736182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58081072A Granted JPS59207024A (ja) | 1983-05-10 | 1983-05-10 | 磁気記録媒体 |
Country Status (4)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62154229A (ja) * | 1985-12-26 | 1987-07-09 | Hitachi Maxell Ltd | 磁気記録媒体 |
| JPS63103423A (ja) * | 1986-10-20 | 1988-05-09 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3773050D1 (de) * | 1986-04-03 | 1991-10-24 | Matsushita Electric Ind Co Ltd | Magnetischer aufzeichnungstraeger. |
| EP0390391B2 (en) † | 1989-03-28 | 2000-12-20 | Konica Corporation | A magnetic recording medium with improved electromagnetic conversion characteristics and anti-environment properties |
| US5236738A (en) * | 1989-06-19 | 1993-08-17 | Fuji Photo Film Co. Ltd. | Method for making magnetic recording media by kneading, dilution kneading, and dispersing a mixture of inorganic grains, binders, and solvents |
| US5213851A (en) * | 1990-04-17 | 1993-05-25 | Alfred University | Process for preparing ferrite films by radio-frequency generated aerosol plasma deposition in atmosphere |
| DE69311834T3 (de) † | 1992-04-14 | 2001-11-15 | Konica Corp., Tokio/Tokyo | Magnetisches Aufzeichnungsmedium |
| US5800866A (en) * | 1996-12-06 | 1998-09-01 | Kimberly-Clark Worldwide, Inc. | Method of preparing small particle dispersions |
| JP2002115002A (ja) * | 2000-10-06 | 2002-04-19 | Toda Kogyo Corp | 鉄を主成分とする紡錘状金属磁性粒子粉末及びその製造法 |
| JP2001355001A (ja) * | 2000-06-13 | 2001-12-25 | Toda Kogyo Corp | 紡錘状ゲータイト粒子粉末、紡錘状ヘマタイト粒子粉末及び鉄を主成分とする紡錘状金属磁性粒子粉末、並びにそれらの製造法 |
| US6720094B2 (en) | 2000-06-13 | 2004-04-13 | Toda Kogyo Corporation | Secondary agglomerates of magnetic metal particles for magnetic recording and process for producing the same |
| US6627313B2 (en) | 2000-10-06 | 2003-09-30 | Toda Kogyo Corporation | Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4730477Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1968-11-30 | 1972-09-12 | ||
| JPS5044158A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1973-08-23 | 1975-04-21 | ||
| JPS5285054A (en) * | 1976-01-09 | 1977-07-15 | Hitachi Ltd | Method of stabilizing metal powder |
| JPS52134858A (en) * | 1976-05-07 | 1977-11-11 | Kanto Denka Kogyo Kk | Method of making magnetic recording magnetic powder containing iron as main constituent |
| JPS5562105A (en) * | 1978-10-30 | 1980-05-10 | Hitachi Maxell Ltd | Production of magnetic alloy powder |
| JPS5634145A (en) * | 1979-08-25 | 1981-04-06 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS5635705A (en) * | 1979-08-31 | 1981-04-08 | Sony Corp | Production of magnetic alloy powder |
| JPS5655503A (en) * | 1979-10-05 | 1981-05-16 | Hitachi Ltd | Production of metal magnetic powder of superior corrosion resistance |
| JPS5698401A (en) * | 1980-01-10 | 1981-08-07 | Mitsui Toatsu Chem Inc | Ferromagnetic metal powder with improved oxidation stability and preparation thereof |
| JPS5723002A (en) * | 1980-07-11 | 1982-02-06 | Hitachi Maxell Ltd | Manufacture of magnetic metal powder |
| JPS5760535A (en) * | 1980-09-30 | 1982-04-12 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS5773105A (en) * | 1980-10-27 | 1982-05-07 | Dowa Mining Co Ltd | Production of ferromagnetic metallic powder |
| JPS5789401A (en) * | 1980-11-25 | 1982-06-03 | Sony Corp | Preparation of acicular magnetic metallic particle |
| JPS57116709A (en) * | 1981-01-10 | 1982-07-20 | Hitachi Maxell Ltd | Manufacture of metallic magnetic powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3574685A (en) * | 1969-01-14 | 1971-04-13 | Ibm | Manufacture of magnetic particles by reacting iron,cobalt,or nickel salts with oxalic acid salts in dialkyl sulfoxide |
| GB1363448A (en) * | 1970-10-05 | 1974-08-14 | Fuji Photo Film Co Ltd | Magnetic recording material |
| US4064292A (en) * | 1972-09-01 | 1977-12-20 | Badische Anilin- & Soda-Fabrik, Aktiengesellschaft | Manufacture of cobalt-modified γ-iron(III)oxides |
| JPS604565B2 (ja) * | 1974-11-21 | 1985-02-05 | 富士写真フイルム株式会社 | 耐食性強磁性金属粉末 |
| US4092459A (en) * | 1975-01-13 | 1978-05-30 | Graham Magnetics Incorporated | Powder products |
| US4020236A (en) * | 1975-07-22 | 1977-04-26 | Fuji Photo Film Co., Ltd. | Process for producing a magnetic material and magnetic recording medium containing the same |
| JPS5814729B2 (ja) * | 1975-08-01 | 1983-03-22 | 富士写真フイルム株式会社 | キヨウジセイフンマツノセイゾウホウホウ |
| JPS52122213A (en) * | 1976-04-05 | 1977-10-14 | Hitachi Ltd | Production of ferromagnetic metal powder |
| JPS6044805B2 (ja) * | 1976-08-27 | 1985-10-05 | 日本ビクター株式会社 | 磁気記録媒体の製造方法 |
| JPS6011447B2 (ja) * | 1976-12-17 | 1985-03-26 | ヤマハ株式会社 | 磁性材料の製法 |
| DE2705967C2 (de) * | 1977-02-12 | 1990-01-04 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid |
| JPS5415407A (en) * | 1977-07-06 | 1979-02-05 | Nippon Musical Instruments Mfg | Powder metallurgical method of sendust alloys |
| JPS6022414B2 (ja) * | 1978-04-10 | 1985-06-01 | 日立マクセル株式会社 | 磁気記録媒体 |
| JPS5841648B2 (ja) * | 1978-08-11 | 1983-09-13 | ヤマハ株式会社 | 積層型ヘツドコア用磁性材料薄板の製法 |
| JPS5531138A (en) * | 1978-08-25 | 1980-03-05 | Nippon Gakki Seizo Kk | Production of feea si base magnetic material |
| DE2905351A1 (de) * | 1979-02-13 | 1980-08-21 | Basf Ag | Verfahren zur herstellung von nadelfoermigem kobalthaltigem, magnetischem eisenoxid |
| DE2905352A1 (de) * | 1979-02-13 | 1980-08-21 | Basf Ag | Verfahren zur herstellung von nadelfoermigem kobalthaltigem magnetischem eisenoxid |
| JPS55149137A (en) * | 1979-05-11 | 1980-11-20 | Tdk Corp | High performance high coercive force powder and its manufacture |
| JPS5921364B2 (ja) * | 1979-07-30 | 1984-05-19 | 戸田工業株式会社 | 針状晶Ｆｅ−Ｚｎ合金磁性粒子粉末の製造法 |
| JPS5921366B2 (ja) * | 1979-08-10 | 1984-05-19 | 戸田工業株式会社 | 針状晶Ｆｅ−Ｃｏ合金磁性粒子粉末の製造法 |
| JPS56145525A (en) * | 1980-04-11 | 1981-11-12 | Tdk Corp | Magnetic recording medium |
| EP0041727B1 (en) * | 1980-06-11 | 1987-09-09 | Hitachi Maxell Ltd. | Process for preparing ferromagnetic particles comprising metallic iron |
| JPS5732306A (en) * | 1980-07-31 | 1982-02-22 | Toda Kogyo Corp | Production of needle crystal fe-ag alloy magnetic particle powder |
| JPS5732305A (en) * | 1980-07-31 | 1982-02-22 | Toda Kogyo Corp | Production of needle crystal fe-mg alloy magnetic particle powder |
| JPS5853688B2 (ja) * | 1980-08-05 | 1983-11-30 | 戸田工業株式会社 | Ｆｅ−Ｍｇを主成分とする針状晶合金磁性粒子粉末の製造法 |
| JPS5753824A (en) * | 1980-09-12 | 1982-03-31 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| AU548794B2 (en) * | 1981-07-28 | 1986-01-02 | Ishihara Sangyo Kaisha Ltd. | Process for producing cobalt containing ferromagnetic iron oxides |
| US4457955A (en) * | 1981-12-29 | 1984-07-03 | Daikin Kogyo Company, Ltd. | Process for producing magnetizable particles |
| JPS5920402A (ja) * | 1982-07-26 | 1984-02-02 | Fuji Photo Film Co Ltd | 強磁性金属粉末 |
| JPS5947301A (ja) * | 1982-09-08 | 1984-03-17 | Fuji Photo Film Co Ltd | 強磁性金属粉末 |
| AU558199B2 (en) * | 1982-09-16 | 1987-01-22 | Ishihara Sangyo Kaisha Ltd. | Production of magnetic powder |
| JPS5950138A (ja) * | 1982-09-16 | 1984-03-23 | Sumitomo Electric Ind Ltd | 交流特性の優れた軟磁性材料及びその製造法 |
| JPS5975608A (ja) * | 1982-10-25 | 1984-04-28 | Fuji Photo Film Co Ltd | 強磁性粉末及びその製造方法 |
-
1983
- 1983-05-10 JP JP58081072A patent/JPS59207024A/ja active Granted
-
1984
- 1984-05-10 EP EP84303179A patent/EP0125150B2/en not_active Expired - Lifetime
- 1984-05-10 DE DE8484303179T patent/DE3484322D1/de not_active Expired - Lifetime
-
1987
- 1987-03-17 US US07/028,023 patent/US4844977A/en not_active Expired - Lifetime
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4730477Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1968-11-30 | 1972-09-12 | ||
| JPS5044158A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1973-08-23 | 1975-04-21 | ||
| JPS5285054A (en) * | 1976-01-09 | 1977-07-15 | Hitachi Ltd | Method of stabilizing metal powder |
| JPS52134858A (en) * | 1976-05-07 | 1977-11-11 | Kanto Denka Kogyo Kk | Method of making magnetic recording magnetic powder containing iron as main constituent |
| JPS5562105A (en) * | 1978-10-30 | 1980-05-10 | Hitachi Maxell Ltd | Production of magnetic alloy powder |
| JPS5634145A (en) * | 1979-08-25 | 1981-04-06 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS5635705A (en) * | 1979-08-31 | 1981-04-08 | Sony Corp | Production of magnetic alloy powder |
| JPS5655503A (en) * | 1979-10-05 | 1981-05-16 | Hitachi Ltd | Production of metal magnetic powder of superior corrosion resistance |
| JPS5698401A (en) * | 1980-01-10 | 1981-08-07 | Mitsui Toatsu Chem Inc | Ferromagnetic metal powder with improved oxidation stability and preparation thereof |
| JPS5723002A (en) * | 1980-07-11 | 1982-02-06 | Hitachi Maxell Ltd | Manufacture of magnetic metal powder |
| JPS5760535A (en) * | 1980-09-30 | 1982-04-12 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JPS5773105A (en) * | 1980-10-27 | 1982-05-07 | Dowa Mining Co Ltd | Production of ferromagnetic metallic powder |
| JPS5789401A (en) * | 1980-11-25 | 1982-06-03 | Sony Corp | Preparation of acicular magnetic metallic particle |
| JPS57116709A (en) * | 1981-01-10 | 1982-07-20 | Hitachi Maxell Ltd | Manufacture of metallic magnetic powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62154229A (ja) * | 1985-12-26 | 1987-07-09 | Hitachi Maxell Ltd | 磁気記録媒体 |
| JPS63103423A (ja) * | 1986-10-20 | 1988-05-09 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6322366B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1988-05-11 |
| EP0125150A2 (en) | 1984-11-14 |
| US4844977A (en) | 1989-07-04 |
| DE3484322D1 (de) | 1991-05-02 |
| EP0125150B2 (en) | 1996-09-25 |
| EP0125150B1 (en) | 1991-03-27 |
| EP0125150A3 (en) | 1986-01-15 |