ATE91675T1 - Verfahren zur herstellung von magnetischen teilchen aus hexaferrit, gewonnene teilchen und diese enthaltende produkte. - Google Patents

Verfahren zur herstellung von magnetischen teilchen aus hexaferrit, gewonnene teilchen und diese enthaltende produkte.

Info

Publication number: ATE91675T1
Authority: AT; Austria
Prior art keywords: particles; manufacture; processes; products containing; miscellaneous
Prior art date: 1988-10-18

Application number

AT89420399T

Other languages

English (en)

Inventor

Jean-Christophe Robert

Pierre-Andre Marie Vincen Mari

Original Assignee

Kodak Pathe

Priority date (The priority date 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 date listed.)

1988-10-18

Filing date

1989-10-17

Publication date

1993-08-15

1989-10-17 Application filed by Kodak Pathe filed Critical Kodak Pathe

1993-08-15 Application granted granted Critical

1993-08-15 Publication of ATE91675T1 publication Critical patent/ATE91675T1/de

Links

239000006249 magnetic particle Substances 0.000 title abstract 2
238000004519 manufacturing process Methods 0.000 title abstract 2
238000000034 method Methods 0.000 title abstract 2
239000002245 particle Substances 0.000 title 1
229910052788 barium Inorganic materials 0.000 abstract 3
DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 3
159000000008 strontium salts Chemical class 0.000 abstract 2
230000001747 exhibiting effect Effects 0.000 abstract 1
238000001914 filtration Methods 0.000 abstract 1
150000002505 iron Chemical class 0.000 abstract 1
230000003472 neutralizing effect Effects 0.000 abstract 1
229910052712 strontium Inorganic materials 0.000 abstract 1
CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract 1
238000005406 washing Methods 0.000 abstract 1

Classifications

- 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
- 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
- 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
- H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- 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
- C01P2004/22—Particle morphology extending in two dimensions, e.g. plate-like with a polygonal circumferential shape
- 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)
Life Sciences & Earth Sciences (AREA)
General Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Inorganic Chemistry (AREA)
Engineering & Computer Science (AREA)
Power Engineering (AREA)
Hard Magnetic Materials (AREA)
Compounds Of Iron (AREA)
Magnetic Record Carriers (AREA)
Soft Magnetic Materials (AREA)

AT89420399T 1988-10-18 1989-10-17 Verfahren zur herstellung von magnetischen teilchen aus hexaferrit, gewonnene teilchen und diese enthaltende produkte. ATE91675T1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR8814221A FR2637888B1 (fr)	1988-10-18	1988-10-18	Procede de preparation de particules magnetiques d'hexaferrites, particules obtenues et produit les contenant
EP89420399A EP0369897B1 (de)	1988-10-18	1989-10-17	Verfahren zur Herstellung von magnetischen Teilchen aus Hexaferrit, gewonnene Teilchen und diese enthaltende Produkte

Publications (1)

Publication Number	Publication Date
ATE91675T1 true ATE91675T1 (de)	1993-08-15

Family

ID=9371446

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AT89420399T ATE91675T1 (de)	1988-10-18	1989-10-17	Verfahren zur herstellung von magnetischen teilchen aus hexaferrit, gewonnene teilchen und diese enthaltende produkte.

Country Status (8)

Country	Link
US (1)	US5135733A (de)
EP (2)	EP0439524A1 (de)
JP (1)	JPH04503938A (de)
AT (1)	ATE91675T1 (de)
DE (1)	DE68907696T2 (de)
ES (1)	ES2058585T3 (de)
FR (1)	FR2637888B1 (de)
WO (1)	WO1990004570A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2638000B1 (fr) *	1988-10-18	1990-12-14	Kodak Pathe	Carte a memoire magnetique a grande capacite et procede de fabrication
US5268249A (en) *	1992-10-29	1993-12-07	Eastman Kodak Company	Magnetic carrier particles
US5306592A (en) *	1992-10-29	1994-04-26	Eastman Kodak Company	Method of preparing electrographic magnetic carrier particles
US5660772A (en) *	1993-09-27	1997-08-26	Alfred University	Process for making ultra-fine barium hexaferrite particles
US20030124052A1 (en) *	2001-12-28	2003-07-03	Mauldin Lloyd Ballard	Production of alkaline earth metal ferrites

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4025449A (en) *	1975-10-21	1977-05-24	The Dow Chemical Company	Process to produce barium and strontium ferrite
US4120806A (en) *	1976-08-30	1978-10-17	Dowa Mining Co., Ltd.	Hexagonal-system ferrite powder, composite plastic-ferrite magnet comprising same and process for production thereof
US4120807A (en) *	1976-08-30	1978-10-17	Dowa Mining Co., Ltd.	Process for producing hexagonal-system ferrite powder
WO1982000287A1 (en) *	1980-07-24	1982-02-04	Kodak Co Eastman	Process for preparing acicular iron oxide particles
DE3042959A1 (de) *	1980-11-14	1982-07-08	Basf Ag, 6700 Ludwigshafen	Verfahren zur herstellung von feinteiligem hochkoerzitivem bariumferrit, sowie seine verwendung zur herstellung von magnetischen aufzeichnungstraegern
JPH0647465B2 (ja) *	1985-08-29	1994-06-22	戸田工業株式会社	ＢａＯ・９／２Ｆｅ▲下２▼Ｏ▲下３▼微結晶粉末の製造方法
JPS62100419A (ja) *	1985-10-24	1987-05-09	Nippon Zeon Co Ltd	磁気記録用磁性粉の製造方法

1988
- 1988-10-18 FR FR8814221A patent/FR2637888B1/fr not_active Expired - Fee Related
1989
- 1989-10-17 EP EP89912113A patent/EP0439524A1/de active Pending
- 1989-10-17 WO PCT/FR1989/000540 patent/WO1990004570A1/fr not_active Ceased
- 1989-10-17 DE DE89420399T patent/DE68907696T2/de not_active Expired - Fee Related
- 1989-10-17 JP JP1511169A patent/JPH04503938A/ja active Pending
- 1989-10-17 AT AT89420399T patent/ATE91675T1/de active
- 1989-10-17 EP EP89420399A patent/EP0369897B1/de not_active Expired - Lifetime
- 1989-10-17 ES ES89420399T patent/ES2058585T3/es not_active Expired - Lifetime
1991
- 1991-06-10 US US07/678,251 patent/US5135733A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
JPH04503938A (ja)	1992-07-16
DE68907696T2 (de)	1994-03-31
WO1990004570A1 (fr)	1990-05-03
US5135733A (en)	1992-08-04
DE68907696D1 (de)	1993-08-26
ES2058585T3 (es)	1994-11-01
EP0369897B1 (de)	1993-07-21
EP0369897A1 (de)	1990-05-23
FR2637888A1 (fr)	1990-04-20
EP0439524A1 (de)	1991-08-07
FR2637888B1 (fr)	1990-12-07

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