FR2385476B1 - - Google Patents
Info
- Publication number
- FR2385476B1 FR2385476B1 FR7809509A FR7809509A FR2385476B1 FR 2385476 B1 FR2385476 B1 FR 2385476B1 FR 7809509 A FR7809509 A FR 7809509A FR 7809509 A FR7809509 A FR 7809509A FR 2385476 B1 FR2385476 B1 FR 2385476B1
- Authority
- FR
- France
- 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
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
- H01F1/065—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 obtained by a reduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B15/00—Other processes for the manufacture of iron from iron compounds
-
- 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
- G11B5/714—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 dimension of the magnetic particles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Paints Or Removers (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Magnetic Record Carriers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2714588A DE2714588C2 (de) | 1977-04-01 | 1977-04-01 | Verfahren zur Herstellung nadelförmiger ferromagnetischer Eisenteilchen |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2385476A1 FR2385476A1 (fr) | 1978-10-27 |
FR2385476B1 true FR2385476B1 (fr) | 1983-02-04 |
Family
ID=6005364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7809509A Granted FR2385476A1 (fr) | 1977-04-01 | 1978-03-31 | Procede de preparation de particules de fer ferromagnetiques aciculaires |
Country Status (6)
Country | Link |
---|---|
US (1) | US4178171A (fr) |
JP (1) | JPS53123898A (fr) |
DE (1) | DE2714588C2 (fr) |
FR (1) | FR2385476A1 (fr) |
GB (2) | GB1597680A (fr) |
NL (1) | NL7803460A (fr) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2815712A1 (de) * | 1978-04-12 | 1979-10-25 | Bayer Ag | Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung |
DE2907255A1 (de) * | 1979-02-24 | 1980-09-04 | Basf Ag | Verfahren zur herstellung nadelfoermiger ferromagnetischer eisenteilchen |
DE2935357A1 (de) * | 1979-09-01 | 1981-09-10 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung nadelfoermiger ferromagnetischer eisenteilchen und deren verwendung |
DE2935358A1 (de) * | 1979-09-01 | 1981-03-26 | Basf Ag, 67063 Ludwigshafen | Verfahren zur herstellung nadelfoermiger ferromagnetischer eisenteilchen und deren verwendung |
JPS5677931A (en) * | 1979-11-28 | 1981-06-26 | Tdk Corp | Magnetic recording medium and its producton |
DE3021111A1 (de) | 1980-06-04 | 1981-12-17 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von nadelfoermigen, im wesentlichen aus eisen bestehenden, ferromagnetischen metallteilchen |
DE3176436D1 (en) * | 1980-06-11 | 1987-10-15 | Hitachi Maxell | Process for preparing ferromagnetic particles comprising metallic iron |
DE3026696A1 (de) | 1980-07-15 | 1982-02-18 | Basf Ag, 6700 Ludwigshafen | Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen mit einem oberflaechenueberzug, verfahren zu deren herstellung sowie ihre verwendung zur herstellung von magnetischen aufzeichnungstraegern |
DE3228669A1 (de) * | 1982-07-31 | 1984-02-02 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung nadelfoermiger, im wesentlichen aus eisen bestehender ferromagnetischer metallteilchen |
JPS59157204A (ja) * | 1983-02-23 | 1984-09-06 | Chisso Corp | 強磁性金属微粒子の製造方法 |
JPS6161404A (ja) * | 1984-08-31 | 1986-03-29 | Sony Corp | 金属磁性粉末の製造方法 |
US10336648B1 (en) * | 1986-03-21 | 2019-07-02 | Alvin R. Stetson | Slip composition |
US4849120A (en) * | 1986-05-13 | 1989-07-18 | Price John T | Magnetically controllable couplings containing ferrafluids |
US4957644A (en) * | 1986-05-13 | 1990-09-18 | Price John T | Magnetically controllable couplings containing ferrofluids |
US5069216A (en) * | 1986-07-03 | 1991-12-03 | Advanced Magnetics Inc. | Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract |
US5219554A (en) * | 1986-07-03 | 1993-06-15 | Advanced Magnetics, Inc. | Hydrated biodegradable superparamagnetic metal oxides |
JPS6367704A (ja) * | 1986-09-09 | 1988-03-26 | Nissan Chem Ind Ltd | 高分散性磁性鉄粉の製造方法 |
JPH06345437A (ja) * | 1993-06-04 | 1994-12-20 | Natl Sci Council | γ−酸化鉄磁気粉末の製造方法 |
US8857603B1 (en) * | 2013-06-20 | 2014-10-14 | Alan Nippert | System for adjusting conveyor direction |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1219009B (de) * | 1963-06-26 | 1966-06-16 | Bayer Ag | Verfahren zur Herstellung von gamma-FeOOH |
NL162233C (nl) * | 1968-03-05 | 1980-04-15 | Philips Nv | Werkwijze ter bereiding van een in hoofdzaak uit ijzer bestaand magnetisch stabiel poeder, voor magnetische registratie. |
US3904540A (en) * | 1972-02-11 | 1975-09-09 | Pfizer | Magnetic impulse record member |
DE2249274A1 (de) * | 1972-10-07 | 1974-04-18 | Bayer Ag | Herstellung von gefaelltem rotem eisen(iii)-oxid |
US4066726A (en) * | 1972-11-18 | 1978-01-03 | Gottfried Mehnert | Multi-stage method of blow molding hollow shaped articles |
JPS5024799A (fr) * | 1973-07-04 | 1975-03-17 | ||
DE2434096C2 (de) * | 1974-07-16 | 1985-10-17 | Basf Ag, 6700 Ludwigshafen | Nadelförmige, vorwiegend aus Eisen bestehende ferromagnetische Metallteilchen und Verfahren zu ihrer Herstellung |
DE2434058C2 (de) * | 1974-07-16 | 1985-12-19 | Basf Ag, 6700 Ludwigshafen | Nadelförmige, vorwiegend aus Eisen bestehende ferromagnetische Metallteilchen und Verfahren zu ihrer Herstellung |
-
1977
- 1977-04-01 DE DE2714588A patent/DE2714588C2/de not_active Expired
-
1978
- 1978-03-20 US US05/888,508 patent/US4178171A/en not_active Expired - Lifetime
- 1978-03-31 JP JP3692978A patent/JPS53123898A/ja active Granted
- 1978-03-31 FR FR7809509A patent/FR2385476A1/fr active Granted
- 1978-03-31 NL NL7803460A patent/NL7803460A/xx unknown
- 1978-04-03 GB GB12882/78A patent/GB1597680A/en not_active Expired
- 1978-04-03 GB GB12425/78A patent/GB1597679A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS53123898A (en) | 1978-10-28 |
JPS6217362B2 (fr) | 1987-04-17 |
GB1597679A (en) | 1981-09-09 |
DE2714588C2 (de) | 1986-06-05 |
GB1597680A (en) | 1981-09-09 |
NL7803460A (nl) | 1978-10-03 |
US4178171A (en) | 1979-12-11 |
DE2714588A1 (de) | 1978-10-12 |
FR2385476A1 (fr) | 1978-10-27 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |