DE68923544D1 - Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. - Google Patents
Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.Info
- Publication number
- DE68923544D1 DE68923544D1 DE68923544T DE68923544T DE68923544D1 DE 68923544 D1 DE68923544 D1 DE 68923544D1 DE 68923544 T DE68923544 T DE 68923544T DE 68923544 T DE68923544 T DE 68923544T DE 68923544 D1 DE68923544 D1 DE 68923544D1
- Authority
- DE
- Germany
- Prior art keywords
- manufacture
- iron oxide
- oxide particles
- magnetic iron
- magnetic
- 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 - Fee Related
Links
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
- G11B5/70626—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 containing non-metallic substances
- G11B5/70642—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 containing non-metallic substances iron oxides
- G11B5/70678—Ferrites
- G11B5/70684—Ferro-ferrioxydes
- G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
-
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
-
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
-
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63333108A JP2925561B2 (ja) | 1988-12-29 | 1988-12-29 | 紡錘形を呈した磁性酸化鉄粒子粉末 |
JP63333109A JP2704540B2 (ja) | 1988-12-29 | 1988-12-29 | 紡錘形を呈した磁性酸化鉄粒子粉末の製造法 |
JP1048029A JP2704544B2 (ja) | 1989-02-27 | 1989-02-27 | 紡錘形を呈した磁性酸化鉄粒子粉末の製造法 |
JP1048028A JP2743007B2 (ja) | 1989-02-27 | 1989-02-27 | 紡錘形を呈した磁性酸化鉄粒子粉末及びその製造法 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68923544D1 true DE68923544D1 (de) | 1995-08-24 |
DE68923544T2 DE68923544T2 (de) | 1996-03-28 |
Family
ID=27462143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68923544T Expired - Fee Related DE68923544T2 (de) | 1988-12-29 | 1989-04-21 | Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. |
Country Status (3)
Country | Link |
---|---|
US (2) | US5314750A (de) |
EP (1) | EP0377933B1 (de) |
DE (1) | DE68923544T2 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE68923544T2 (de) * | 1988-12-29 | 1996-03-28 | Toda Kogyo Corp | Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. |
EP0466338B1 (de) * | 1990-06-26 | 1995-12-20 | Toda Kogyo Corp. | Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung |
EP0515748B1 (de) * | 1991-05-31 | 1996-12-27 | Toda Kogyo Corp. | Verfahren zur Herstellung von nadelförmigen Goethit-Teilchen und nadelförmigen magnetischen Eisenoxid-Teilchen |
EP0604849B1 (de) * | 1992-12-29 | 1996-10-16 | Ishihara Sangyo Kaisha, Ltd. | Magnetisches kobalthaltiges Eisenoxid und Verfahren zu dessen Herstellung |
US5648170A (en) * | 1993-04-27 | 1997-07-15 | Toda Kogyo Corporation | Coated granular magnetite particles and process for producing the same |
CA2175466A1 (en) * | 1993-11-01 | 1995-05-11 | Jean A. Lown | Process for making goethite |
US5814164A (en) | 1994-11-09 | 1998-09-29 | American Scientific Materials Technologies L.P. | Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures |
JP3428197B2 (ja) * | 1994-12-09 | 2003-07-22 | 戸田工業株式会社 | 針状磁性酸化鉄粒子粉末及びその製造法 |
US5989516A (en) * | 1994-12-13 | 1999-11-23 | Toda Kogyo Corporation | Spindle-shaped geothite particles |
US5645652A (en) * | 1994-12-13 | 1997-07-08 | Toda Kogyo Corporation | Spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients and process for producing the same |
US6461562B1 (en) | 1999-02-17 | 2002-10-08 | American Scientific Materials Technologies, Lp | Methods of making sintered metal oxide articles |
CA2379897A1 (en) * | 1999-07-29 | 2001-02-08 | Halliburton Energy Services, Inc. | Method and composition for scavenging sulphide in drilling fluids |
US6179987B1 (en) | 1999-08-11 | 2001-01-30 | Ut Battelle, Llc | Method and apparatus to electrolytically produce high-purity magnetite particles |
EP1492089B1 (de) * | 2002-04-03 | 2007-06-06 | Dowa Mining Co., Ltd. | Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit |
US7238438B2 (en) * | 2002-04-03 | 2007-07-03 | Dowa Mining Co., Ltd. | Powder for underlayer of coating-type magnetic recording medium |
US9254453B2 (en) | 2013-03-06 | 2016-02-09 | Halliburton Energy Services, Inc. | Economical method for scavenging hydrogen sulfide in fluids |
CN103529018B (zh) * | 2013-10-04 | 2015-12-23 | 北京联合大学生物化学工程学院 | 用于监测苯和三甲胺的催化发光敏感材料 |
CN111569820B (zh) * | 2020-06-04 | 2023-08-22 | 浙江恒昌纺织科技有限公司 | 一种污染物高效固定材料和污染物高效固定方法 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3720618A (en) * | 1970-05-08 | 1973-03-13 | Toda Kogyo Corp | Method of producing a powder of cobalt-containing needle-like shaped gamma-ferric oxide particles as magnetic recording material |
US3977985A (en) * | 1972-02-23 | 1976-08-31 | Tdk Electronics Company, Limited | Magnetic recording medium comprising cobalt or cobalt alloy coated particles of spicular magnetite |
JPS5080999A (de) * | 1973-11-22 | 1975-07-01 | ||
JPS5310279B2 (de) * | 1974-03-01 | 1978-04-12 | ||
US4108787A (en) * | 1974-12-20 | 1978-08-22 | Fuji Photo Film Co., Ltd. | Process for producing ferromagnetic iron oxide |
JPS525497A (en) * | 1975-07-02 | 1977-01-17 | Fuji Photo Film Co Ltd | Ferromagnetic grit manufacturing process |
US4136158A (en) * | 1976-11-01 | 1979-01-23 | Toda Kogyo Corp. | Production of acicular magnetic iron oxides |
US4226909A (en) * | 1978-08-21 | 1980-10-07 | Minnesota Mining And Manufacturing Company | Cobalt-doped acicular hyper-magnetite particles |
US4276183A (en) * | 1978-10-25 | 1981-06-30 | Pfizer Inc. | Cobalt modified magnetic iron oxide |
DE2903593C3 (de) * | 1979-01-31 | 1982-05-06 | Bayer Ag, 5090 Leverkusen | Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung |
US4495164A (en) * | 1980-05-30 | 1985-01-22 | Toda Kogyo Corp. | Process for producing acicular magnetite or acicular maghemite |
FR2487326A1 (fr) * | 1980-07-24 | 1982-01-29 | Kodak Pathe | Procede de preparation de particules aciculaires d'oxyde de fer magnetique |
JPS5852806A (ja) * | 1981-09-24 | 1983-03-29 | Hitachi Maxell Ltd | 磁気記録媒体 |
DE3469820D1 (en) * | 1983-04-25 | 1988-04-14 | Daikin Ind Ltd | Acicular particulate material containing iron carbide |
US4842759A (en) * | 1983-04-25 | 1989-06-27 | Daikin Industries, Ltd. | Acicular process for producing particulate material |
JPS59232922A (ja) * | 1983-06-15 | 1984-12-27 | Dainippon Ink & Chem Inc | 軸比の大きな紡錘形ゲ−サイトの製造方法 |
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 |
KR850004869A (ko) * | 1983-12-27 | 1985-07-27 | 마쓰이 고로오 | 방추형 강자성 합금입자 및 그의 제조방법 |
EP0160496B1 (de) * | 1984-04-28 | 1989-09-13 | Toda Kogyo Corp. | Magnetische Eisenoxydteilchen |
JPH0651574B2 (ja) * | 1985-11-30 | 1994-07-06 | 戸田工業株式会社 | 紡錘型を呈した磁性酸化鉄粒子粉末の製造法 |
JPH0647681B2 (ja) * | 1985-12-28 | 1994-06-22 | 戸田工業株式会社 | 紡錘形状を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法 |
EP0265189B1 (de) * | 1986-10-17 | 1992-08-05 | Toda Kogyo Corp. | Nadelförmige magnetische Eisenoxydteilchen, Verfahren zu ihrer Herstellung und solche Teilchen verwendende magnetische Aufzeichnungsträger |
DE68923544T2 (de) * | 1988-12-29 | 1996-03-28 | Toda Kogyo Corp | Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. |
DE68918836T2 (de) * | 1989-01-27 | 1995-02-23 | Toda Kogyo Corp | Nadelförmige magnetische Teilchen aus einer Eisenlegierung für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung. |
US5028483A (en) * | 1990-06-01 | 1991-07-02 | Minnesota Mining And Manufacturing Company | Magnetic recording medium comprising acicular dendrite free iron oxide magnetic pigment particles |
-
1989
- 1989-04-21 DE DE68923544T patent/DE68923544T2/de not_active Expired - Fee Related
- 1989-04-21 EP EP89304015A patent/EP0377933B1/de not_active Expired - Lifetime
-
1992
- 1992-10-27 US US07/967,522 patent/US5314750A/en not_active Expired - Fee Related
-
1994
- 1994-02-16 US US08/197,180 patent/US5582914A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5582914A (en) | 1996-12-10 |
EP0377933A2 (de) | 1990-07-18 |
EP0377933A3 (de) | 1991-05-08 |
EP0377933B1 (de) | 1995-07-19 |
US5314750A (en) | 1994-05-24 |
DE68923544T2 (de) | 1996-03-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |