IT986077B - ACICULAR FERRIMAGNETIC IRON OXIDE AND PROCEDURE FOR PRODUCING IT - Google Patents

ACICULAR FERRIMAGNETIC IRON OXIDE AND PROCEDURE FOR PRODUCING IT

Info

Publication number: IT986077B
Authority: IT; Italy
Prior art keywords: procedure; producing; iron oxide; ferrimagnetic iron; acicular ferrimagnetic
Prior art date: 1972-04-29

Application number

IT4968873A

Other languages

Italian (it)

Original Assignee

Bayer Ag

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.)

1972-04-29

Filing date

1973-04-27

Publication date

1975-01-10

1972-04-29 Priority claimed from DE19722221264 external-priority patent/DE2221264C3/en

1973-04-27 Application filed by Bayer Ag filed Critical Bayer Ag

1975-01-10 Application granted granted Critical

1975-01-10 Publication of IT986077B publication Critical patent/IT986077B/en

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
- G11B5/70652—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 gamma - Fe2 O3
- G11B5/70668—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 gamma - Fe2 O3 containing a dopant
- G11B5/70673—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 gamma - Fe2 O3 containing a dopant containing Co
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/06—Ferric oxide [Fe2O3]
- 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
- 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
- G11B5/70647—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 with a skin
- 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
- G11B5/70652—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 gamma - Fe2 O3
- G11B5/70657—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 gamma - Fe2 O3 with a skin
- 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
- G11B5/70652—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 gamma - Fe2 O3
- G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
- 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
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
- 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
- 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
- C01P2006/80—Compositional purity

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Inorganic Chemistry (AREA)
Health & Medical Sciences (AREA)
Dermatology (AREA)
General Health & Medical Sciences (AREA)
Hard Magnetic Materials (AREA)
Compounds Of Iron (AREA)

IT4968873A 1972-04-29 1973-04-27 ACICULAR FERRIMAGNETIC IRON OXIDE AND PROCEDURE FOR PRODUCING IT IT986077B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19722221264 DE2221264C3 (en)		1972-04-29	Acicular ferrimagnetic iron oxides containing cobalt and silicon oxide

Publications (1)

Publication Number	Publication Date
IT986077B true IT986077B (en)	1975-01-10

Family

ID=5843730

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT4968873A IT986077B (en)	1972-04-29	1973-04-27	ACICULAR FERRIMAGNETIC IRON OXIDE AND PROCEDURE FOR PRODUCING IT

Country Status (8)

Country	Link
JP (1)	JPS4941299A (en)
BE (1)	BE798807A (en)
CA (1)	CA1019562A (en)
FR (1)	FR2183052B1 (en)
GB (1)	GB1417505A (en)
IT (1)	IT986077B (en)
NL (1)	NL7305964A (en)
PL (1)	PL85585B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5295097A (en) *	1976-02-04	1977-08-10	Nippon Telegr & Teleph Corp <Ntt>	Magnetic recording material
JPS5356196A (en) *	1976-11-01	1978-05-22	Toda Kogyo Corp	Process for preparing acicular alphaafeooh particle
JPS5420998A (en) *	1977-07-18	1979-02-16	Toda Kogyo Corp	Method of making coocontaining acicular crystal magnetic ferrite particulates
JPS5493697A (en) *	1978-01-04	1979-07-24	Toda Kogyo Corp	Manufacture of co contained needleelike crystal magnetic iron oxide particle powder

1973
- 1973-04-27 GB GB2016373A patent/GB1417505A/en not_active Expired
- 1973-04-27 IT IT4968873A patent/IT986077B/en active
- 1973-04-27 CA CA169,688A patent/CA1019562A/en not_active Expired
- 1973-04-27 NL NL7305964A patent/NL7305964A/xx active Search and Examination
- 1973-04-27 BE BE130485A patent/BE798807A/en not_active IP Right Cessation
- 1973-04-27 FR FR7315312A patent/FR2183052B1/fr not_active Expired
- 1973-04-28 PL PL16220273A patent/PL85585B1/pl unknown
- 1973-05-01 JP JP48047679A patent/JPS4941299A/ja active Pending

Also Published As

Publication number	Publication date
JPS4941299A (en)	1974-04-18
DE2221264B2 (en)	1977-07-07
BE798807A (en)	1973-10-29
FR2183052A1 (en)	1973-12-14
DE2221264A1 (en)	1973-11-15
FR2183052B1 (en)	1976-03-05
NL7305964A (en)	1973-10-31
CA1019562A (en)	1977-10-25
GB1417505A (en)	1975-12-10
PL85585B1 (en)	1976-04-30

Publication	Publication Date	Title
IT974063B (en)	1974-06-20	PROCEDURE FOR PRODUCING ACICULAR MAGNETIC IRON OXIDES
IT976964B (en)	1974-09-10	PROCEDURE FOR PRODUCING ACICULAR MAGNETIC IRON OXIDES AND MEMORY ELEMENT CONTAINING THEM
IT956231B (en)	1973-10-10	PROCEDURE AND DEVICE FOR THE PRODUCTION OF METALLIC POWDERS
IT966309B (en)	1974-02-11	PROCEDURE FOR THE PRODUCTION OF HIGH COERCIVITY FERRIC MAGNETIC OXIDE
GB1446741A (en)	1976-08-18	Magnetic detector and method of manufacturing the same
IT989547B (en)	1975-06-10	PROCEDURE FOR PRODUCING ACICULAR FERRIMAGNETIC IRON OXIDE CONTAINING COBALT
IL41523A0 (en)	1973-04-30	Convector and its manufacturing process
IT973717B (en)	1974-06-10	PROCEDURE FOR THE PRODUCTION OF STABLE AND MAGNETIC ACICULAR IRON PARTICLES
IT967900B (en)	1974-03-11	PROCEDURE FOR THE MANUFACTURE OF A MAGNETIC HEAD AND MAGNETIC HEAD SO OBTAINED
IT966093B (en)	1974-02-11	PROCEDURE AND DEVICE FOR THE APPLICATION OF METALLIC COVERINGS
JPS57131761A (en)	1982-08-14	Manufacture of aminophenylcycloamidine and salts of same
ZA737796B (en)	1974-08-28	Antenna winshields and method of producing the same
BE781568A (en)	1972-10-02	INSULATION MATERIAL AND ITS MANUFACTURING METHODS
BG24535A3 (en)	1978-03-10	Method of obtaining propylene oxide
CA939055A (en)	1973-12-25	Magnetic erasing head and method of making the same
IT961841B (en)	1973-12-10	PROCEDURE FOR THE PRODUCTION OF NEUTRAL AND STRONGLY BASIC ALKYLPHENATES AND ALKYLPHENATES SULFURATES
IT994045B (en)	1975-10-20	HARDENABLE ORGANOPOLYSILOXANS AND PROCEDURE FOR PRODUCING
IT969927B (en)	1974-04-10	PROCEDURE FOR MANUFACTURING NON-ORIENTED MAGNETIC STEEL SHEETS AND STRIPS WITHOUT SCRAPS
IT985289B (en)	1974-11-30	PROCEDURE AND DEVICE FOR THE ASSEMBLY OF MARKERS
IT953825B (en)	1973-08-10	PROCESS AND FORMING EQUIPMENT
IL42775A0 (en)	1973-10-25	Method of improving the bonding capability of polymer surfaces
JPS5550604A (en)	1980-04-12	Method of manufacturing ferrite magnetic material
GB1374592A (en)	1974-11-20	Polycarboxylic acids and water-soluble salts thereof
IT1000702B (en)	1976-04-10	PROCEDURE AND DEVICE FOR PRODUCING METALLIC POWDERS
IT958048B (en)	1973-10-20	ELECTRIC CONDENSER AND METHOD FOR REALIZING IT