GB717537A - Magnetic impulse record carriers - Google Patents

Magnetic impulse record carriers

Info

Publication number
GB717537A
GB717537A GB8550/52A GB855052A GB717537A GB 717537 A GB717537 A GB 717537A GB 8550/52 A GB8550/52 A GB 8550/52A GB 855052 A GB855052 A GB 855052A GB 717537 A GB717537 A GB 717537A
Authority
GB
United Kingdom
Prior art keywords
solution
ferrous
added
sulphates
nickel
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
Application number
GB8550/52A
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.)
Agfa Gevaert NV
Original Assignee
Agfa 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.)
Filing date
Publication date
Application filed by Agfa AG filed Critical Agfa AG
Publication of GB717537A publication Critical patent/GB717537A/en
Expired 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2666—Other ferrites containing nickel, copper or cobalt
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
GB8550/52A 1951-04-09 1952-04-03 Magnetic impulse record carriers Expired GB717537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE717537X 1951-04-09

Publications (1)

Publication Number Publication Date
GB717537A true GB717537A (en) 1954-10-27

Family

ID=6626729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8550/52A Expired GB717537A (en) 1951-04-09 1952-04-03 Magnetic impulse record carriers

Country Status (3)

Country Link
BE (1) BE510462A (xx)
FR (1) FR1053344A (xx)
GB (1) GB717537A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100158A (en) * 1960-11-02 1963-08-06 Rca Corp Methods for obtaining films of magnetic spinel crystals on substrates
US3139354A (en) * 1961-03-31 1964-06-30 Rca Corp Magnetic recording element containing magnetic particles treated with werner-type complex compound and method of manufacture thereof
US3149995A (en) * 1961-04-28 1964-09-22 Rca Corp Magnetic recording element and method of preparation thereof
US3179533A (en) * 1961-10-04 1965-04-20 Rusch Adolphe Magnetic tape with reinforced backing

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978414A (en) * 1951-04-09 1961-04-04 Agfa Ag Magnetic impulse record carrier
DE1057256B (de) * 1955-10-29 1959-05-14 Steatit Magnesia Ag Verfahren zur Herstellung von ferromagnetischen Ferritkoerpern mit eingeschnuerter Hystereseschleife
DE1137667B (de) * 1957-02-16 1962-10-04 Dr Yoshimitsu Kikuchi Verfahren zur Herstellung ferromagnetischer Koerper fuer Magnetostriktionsschwinger
US3031341A (en) * 1958-01-23 1962-04-24 Ibm High density magnetic recording tape
US3078234A (en) * 1958-04-24 1963-02-19 Jr Charles M Davis Magnetostrictive ferrite
DE1202206B (de) * 1962-09-28 1965-09-30 Siemens Ag Verwendung von Eisen(II)-chlorid-Abfall-loesungen zur Herstellung von ferromagnetischen Ferriten

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100158A (en) * 1960-11-02 1963-08-06 Rca Corp Methods for obtaining films of magnetic spinel crystals on substrates
US3139354A (en) * 1961-03-31 1964-06-30 Rca Corp Magnetic recording element containing magnetic particles treated with werner-type complex compound and method of manufacture thereof
US3149995A (en) * 1961-04-28 1964-09-22 Rca Corp Magnetic recording element and method of preparation thereof
US3150995A (en) * 1961-04-28 1964-09-29 Rca Corp Magnetic recording element having diisocyanate-based elastomer binder and method forpreparing same
US3179533A (en) * 1961-10-04 1965-04-20 Rusch Adolphe Magnetic tape with reinforced backing

Also Published As

Publication number Publication date
FR1053344A (fr) 1954-02-02
BE510462A (xx)

Similar Documents

Publication Publication Date Title
US3075919A (en) Process for the production of acicular gamma-iron (iii) oxide
GB717537A (en) Magnetic impulse record carriers
GB1392980A (en) Production of acicular magnetic iron oxides
GB1152484A (en) Process For Dehydrogenating Organic Compounds
GB1432643A (en) Manufacture of cobalt-modified ypsilon-iron-iii-oxides
GB1437843A (en) Magnetic powder and the preparation thereof
KR850003468A (ko) 자기 기록용 판상(板狀) 바륨 페라이트의 제조방법
GB1441183A (en) Magnetic recording particles
GB721630A (en) Method for the production of ª†-fe o of improved magnetic properties
GB644639A (en) Improvements in or relating to magnetic materials
GB1294374A (en) Process for the preparation of acicular, submicroscopic, permanently magnetizable metal particles
GB1221434A (en) PROCESS FOR THE PRODUCTION OF HIGHLY COERCIVE NEEDLE-SHAPED gamma-Fe2O3 AND MAGNETIC RECORDING MEMBERS PREPARED THEREWITH
GB979721A (en) Ferrite particles and method for their preparation
GB1347202A (en) Salts of dihydrochalcone derivatives and their use as sweeteners
GB1395704A (en) Magnetic materials
JPS5622638A (en) Manufacture of alpha-iron oxyhydroxide
GB1362015A (en) Long chain hydrocarbon dithiocarbamate accelerators and method of making same
GB1458623A (en) Production of acicular cobalt-containing ferri-magnetic iron oxides
GB1034504A (en) Improvements in or relating to methods of producing magnetic iron oxide, ª† feo
GB740797A (en) Improved method of recovering metal values from solutions
JPS54122103A (en) Magnetic recording medium and production of the same
GR3015521T3 (en) Process for producing the precursor of a precipitated catalyst for the ammonia synthesis.
GB1297310A (xx)
GB1520756A (en) Manufacture of gamma-iron (iii) oxide
GB719283A (en) Improvements in or relating to a method of producing finely divided magnetic iron oxide