GB1418933A - Magnetic recording materials and process for preparation thereof - Google Patents

Magnetic recording materials and process for preparation thereof

Info

Publication number
GB1418933A
GB1418933A GB381773A GB381773A GB1418933A GB 1418933 A GB1418933 A GB 1418933A GB 381773 A GB381773 A GB 381773A GB 381773 A GB381773 A GB 381773A GB 1418933 A GB1418933 A GB 1418933A
Authority
GB
United Kingdom
Prior art keywords
magnetic
magnetic recording
sodium
acid
deposition
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
GB381773A
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.)
Pilot Corp
Original Assignee
Pilot Pen Co Ltd
Pilot Man Nen Hitsu KK
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 Pilot Pen Co Ltd, Pilot Man Nen Hitsu KK filed Critical Pilot Pen Co Ltd
Publication of GB1418933A publication Critical patent/GB1418933A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/20—Electrolytic after-treatment
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/024—Anodisation under pulsed or modulated current or potential
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/045—Anodisation of aluminium or alloys based thereon for forming AAO templates
    • 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
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/06—Thin magnetic films, e.g. of one-domain structure characterised by the coupling or physical contact with connecting or interacting conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

1418933 Electrolytic production of magnetic recording material PILOT MAN-NEN-HITSU KK 25 Jan 1973 [14 April 1972] 3817/73 Heading C7B Magnetic recording material comprises an anodized aluminium or aluminium alloy surface, the pores of which are filled with a magnetic substance, e.g. by electro-deposition from a bath containing salts of Co, Ni, Mn, Mg and/or Fe to deposit Co, Ni, Fe or a magnetic alloy. Anodizing may be effected using an electrolyte containing at least one of sulphuric, chromic, phosphoric, sulphonic, sulphosalicylic, maleic, oxalic, phthalic, succinic, malonic, sulphamic, malic and tartaric acids; and optionally sodium hydroxide, ammonium borate, trisodium phosphate, sodium borate, sodium gluconate, sodium citrate, NH 4 SO 4 , thiourea, lauryl Na sulphate, Na EDTA, acetamide, glucose or saponin; and using D.C., A.C., D.C./A.C. or periodically reversed current. The electrolytic bath for deposition of the magnetic material may also contain salts of Mg, Cu, Al, V, Au, Sn, Zn or the rare earth metals, glycerine, ethylene glycol, polyhydric alcohols, (thio) urea, ammonium sulphate, boric acid, cresolsulphonic acid or sulphosalicylic acid. The electric current used may be D.C., A.C.; superimposed A.C./D.C., or periodically reversed D.C.
GB381773A 1972-04-14 1973-01-25 Magnetic recording materials and process for preparation thereof Expired GB1418933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47037421A JPS5121562B2 (en) 1972-04-14 1972-04-14

Publications (1)

Publication Number Publication Date
GB1418933A true GB1418933A (en) 1975-12-24

Family

ID=12497044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB381773A Expired GB1418933A (en) 1972-04-14 1973-01-25 Magnetic recording materials and process for preparation thereof

Country Status (9)

Country Link
JP (1) JPS5121562B2 (en)
BE (1) BE798227A (en)
CA (1) CA1020489A (en)
CH (1) CH570659A5 (en)
DE (1) DE2309594C3 (en)
FR (1) FR2179731B1 (en)
GB (1) GB1418933A (en)
IT (1) IT977418B (en)
NL (1) NL157443B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808279A (en) * 1986-10-02 1989-02-28 The University Of Toronto Innovations Foundation Process for preparing magnetic recording material

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4939966U (en) * 1972-07-10 1974-04-08
JPS51148407A (en) * 1975-06-13 1976-12-20 Mitsubishi Electric Corp Magnetic recording medium
DE2616662C2 (en) * 1976-04-15 1984-02-02 Dornier System Gmbh, 7990 Friedrichshafen METHOD FOR PRODUCING A SELECTIVE SOLAR ABSORBER LAYER ON ALUMINUM
DE2658956A1 (en) * 1976-12-24 1978-06-29 Ibm Deutschland Magnetic recording material with extremely high bit density - using anisotropic alloys of gadolinium with iron or cobalt
JPS5671821A (en) * 1979-11-14 1981-06-15 Hitachi Ltd Substrate for magnetic disc and its manufacture
DE3035148A1 (en) * 1980-09-18 1982-04-22 Ibm Deutschland Gmbh, 7000 Stuttgart MAGNETIC RECORDING CARRIER FOR VERTICAL RECORDING
JPS5746320A (en) * 1980-09-01 1982-03-16 Pilot Pen Co Ltd:The Magnetic recording material and its production
JPS57158013A (en) * 1981-03-24 1982-09-29 Nec Corp Magnetic recording body
EP0076142B1 (en) * 1981-09-28 1987-09-16 Xerox Corporation Post treatment of perpendicular magnetic recording media
JPS59130406A (en) * 1983-01-17 1984-07-27 Nippon Telegr & Teleph Corp <Ntt> Manufacture of powder permanent magnet
JPS59207029A (en) * 1983-05-10 1984-11-24 Nippon Gakki Seizo Kk Magnetic recording medium and its manufacture
EP0783747A1 (en) * 1995-05-26 1997-07-16 International Business Machines Corporation Direct contact disk for vertical magnetic data recording
FR3044329A1 (en) * 2015-11-27 2017-06-02 Constellium Neuf-Brisach METHOD FOR ELECTROLYTIC DEPOSITION OF AN ALTERNATING CURRENT CONVERSION LAYER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808279A (en) * 1986-10-02 1989-02-28 The University Of Toronto Innovations Foundation Process for preparing magnetic recording material

Also Published As

Publication number Publication date
NL7301706A (en) 1973-10-16
FR2179731A1 (en) 1973-11-23
DE2309594C3 (en) 1975-08-28
CA1020489A (en) 1977-11-08
JPS5121562B2 (en) 1976-07-03
NL157443B (en) 1978-07-17
BE798227A (en) 1973-07-31
DE2309594A1 (en) 1973-10-18
FR2179731B1 (en) 1976-09-10
CH570659A5 (en) 1975-12-15
JPS4942305A (en) 1974-04-20
IT977418B (en) 1974-09-10
DE2309594B2 (en) 1975-01-16

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930123