FR2449711A1 - Procede pour la preparation d'un pigment de feooh, et element d'enregistrement magnetique comportant un tel pigment - Google Patents

Procede pour la preparation d'un pigment de feooh, et element d'enregistrement magnetique comportant un tel pigment

Info

Publication number
FR2449711A1
FR2449711A1 FR8003692A FR8003692A FR2449711A1 FR 2449711 A1 FR2449711 A1 FR 2449711A1 FR 8003692 A FR8003692 A FR 8003692A FR 8003692 A FR8003692 A FR 8003692A FR 2449711 A1 FR2449711 A1 FR 2449711A1
Authority
FR
France
Prior art keywords
pigment
feooh
low
ammonium salt
salt
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.)
Withdrawn
Application number
FR8003692A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2449711A1 publication Critical patent/FR2449711A1/fr
Withdrawn legal-status Critical Current

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
    • G11B5/70657—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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/22—Compounds of iron
    • C09C1/24—Oxides of iron
    • 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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties
    • 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
    • Y10T428/257—Iron oxide or aluminum oxide

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Paints Or Removers (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

ON PART D'UNE DISPERSION AQUEUSE A REACTION ACIDE OU ALCALINE DE PARTICULES DE FEOOH REALISEES SUIVANT DES METHODES CONNUES. LA DISPERSION AQUEUSE EST ADDITIONNEE D'UN SEL D'AMMONIUM, SOLUBLE DANS L'EAU DERIVE D'UN ACIDE ORGANIQUE FAIBLE A POIDS MOLECULAIRE BAS, SEL QUI SE VOLATILISE A AU MAXIMUM 450C COMME TEL OU APRES DECOMPOSITION. L'ADDITION DU SEL D'AMMONIUM PROVOQUE LA FLOCULATION DU PIGMENT DE FEOOH, QUI EST SEPARE ET LAVE A L'EAU, DE PREFERENCE EGALEMENT MUNI D'UN SEL D'AMMONIUM. SUIVANT UNE AUTRE ELABORATION DE LA PRESENTE INVENTION, LE PIGMENT OBTENU QUI PRESENTE UNE TENEUR ASSEZ FAIBLE EN SEL APRES SECHAGE, EST TRANSFORME EN UN PIGMENT DE FE OU DE G-FEO, QUI PRESENTE EGALEMENT UNE TRES FAIBLE TENEUR EN SEL. UN ELEMENT D'ENREGISTREMENT MAGNETIQUE, QUI EST BASE SUR LE PIGMENT DE FE OU DE G-FEO CONFORME A L'INVENTION PRESENTE DES PROPRIETES D'ENDURANCE PERFECTIONNEES, SURTOUT DANS LE CAS D'UTILISATION D'EMMAGASINAGE DANS DES CONDITIONS HUMIDES. APPLICATION: BANDES MAGNETIQUES.
FR8003692A 1979-02-23 1980-02-20 Procede pour la preparation d'un pigment de feooh, et element d'enregistrement magnetique comportant un tel pigment Withdrawn FR2449711A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7901438A NL7901438A (nl) 1979-02-23 1979-02-23 Werkwijze voor de bereiding van een feooh pigment.

Publications (1)

Publication Number Publication Date
FR2449711A1 true FR2449711A1 (fr) 1980-09-19

Family

ID=19832681

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8003692A Withdrawn FR2449711A1 (fr) 1979-02-23 1980-02-20 Procede pour la preparation d'un pigment de feooh, et element d'enregistrement magnetique comportant un tel pigment

Country Status (7)

Country Link
US (1) US4349385A (fr)
JP (1) JPS55113631A (fr)
BE (1) BE881848A (fr)
DE (1) DE3004056A1 (fr)
FR (1) FR2449711A1 (fr)
GB (1) GB2043614B (fr)
NL (1) NL7901438A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354314A1 (fr) * 1988-06-16 1990-02-14 Bayer Ag Pigments d'oxyde de fer de la structure de l'oxyde de fer gamma thermiquement stables, procédé de fabrication et utilisation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505990A (en) * 1983-07-14 1985-03-19 Hercules Incorporated Coating compositions
IL132506A (en) 1999-10-21 2006-06-11 Biopigment Ltd Method for production of iron oxide pigments
AU2003252407A1 (en) * 2002-08-06 2004-03-03 Nippon Sheet Glass Company Limited Process for producing ferromagnetic fine-particle exothermic element
CN102285692B (zh) * 2011-06-16 2013-03-27 西南大学 一种具有强磁光效应胶体的制备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD74306A (fr) *
JPS4915360A (fr) * 1972-05-17 1974-02-09
FR2209989A1 (fr) * 1972-07-26 1974-07-05 Khalafalla Sanaa
FR2274562A1 (fr) * 1974-06-14 1976-01-09 Basf Ag Procede de preparation d'oxyde de fer g-(iii)
JPS5120595A (fr) * 1974-08-11 1976-02-18 Hitachi Maxell
JPS54138894A (en) * 1978-04-20 1979-10-27 Hitachi Maxell Ltd Production of magnetic iron oxide powder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1219009B (de) * 1963-06-26 1966-06-16 Bayer Ag Verfahren zur Herstellung von gamma-FeOOH
US4178416A (en) * 1976-03-12 1979-12-11 Eastman Kodak Company Acicular ferric oxide for magnetic recording and process for producing same
DE2633597C2 (de) * 1976-07-27 1983-01-13 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von nadel- bis prismenförmigen ferrimagnetischen Eisenoxidpigmenten zur magnetischen Signalaufzeichnung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD74306A (fr) *
JPS4915360A (fr) * 1972-05-17 1974-02-09
FR2209989A1 (fr) * 1972-07-26 1974-07-05 Khalafalla Sanaa
FR2274562A1 (fr) * 1974-06-14 1976-01-09 Basf Ag Procede de preparation d'oxyde de fer g-(iii)
JPS5120595A (fr) * 1974-08-11 1976-02-18 Hitachi Maxell
JPS54138894A (en) * 1978-04-20 1979-10-27 Hitachi Maxell Ltd Production of magnetic iron oxide powder

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CA1975 *
CA1976 *
CA1980 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354314A1 (fr) * 1988-06-16 1990-02-14 Bayer Ag Pigments d'oxyde de fer de la structure de l'oxyde de fer gamma thermiquement stables, procédé de fabrication et utilisation
US5049193A (en) * 1988-06-16 1991-09-17 Bayer Aktiengesellschaft Heat stable iron oxide pigments of upsilon-Fe2 O3 structure, a process for their production and their use

Also Published As

Publication number Publication date
GB2043614A (en) 1980-10-08
DE3004056A1 (de) 1980-08-28
JPH0243687B2 (fr) 1990-10-01
NL7901438A (nl) 1980-08-26
US4349385A (en) 1982-09-14
JPS55113631A (en) 1980-09-02
GB2043614B (en) 1983-01-26
BE881848A (fr) 1980-08-21

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Legal Events

Date Code Title Description
ST Notification of lapse