CA999491A - Magnetic recording medium incorporating fine acicular iron-based particles - Google Patents

Magnetic recording medium incorporating fine acicular iron-based particles

Info

Publication number
CA999491A
CA999491A CA169,728A CA169728A CA999491A CA 999491 A CA999491 A CA 999491A CA 169728 A CA169728 A CA 169728A CA 999491 A CA999491 A CA 999491A
Authority
CA
Canada
Prior art keywords
recording medium
magnetic recording
based particles
acicular iron
medium incorporating
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
CA169,728A
Other languages
English (en)
Other versions
CA169728S (en
Inventor
John S. Roden
Kent A. Kirkevold
Gary L. Tritle
Gene A. Sjerven
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of CA999491A publication Critical patent/CA999491A/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
    • G11B5/70605—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 metals or alloys
    • G11B5/70615—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 metals or alloys containing Fe metal or alloys
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
CA169,728A 1972-05-22 1973-04-27 Magnetic recording medium incorporating fine acicular iron-based particles Expired CA999491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US255262A US3865627A (en) 1972-05-22 1972-05-22 Magnetic recording medium incorporating fine acicular iron-based particles

Publications (1)

Publication Number Publication Date
CA999491A true CA999491A (en) 1976-11-09

Family

ID=22967549

Family Applications (1)

Application Number Title Priority Date Filing Date
CA169,728A Expired CA999491A (en) 1972-05-22 1973-04-27 Magnetic recording medium incorporating fine acicular iron-based particles

Country Status (14)

Country Link
US (1) US3865627A (de)
JP (1) JPS5928964B2 (de)
AR (1) AR199569A1 (de)
AT (1) AT355825B (de)
AU (1) AU450059B2 (de)
BR (1) BR7303736D0 (de)
CA (1) CA999491A (de)
DE (1) DE2326258C2 (de)
FR (1) FR2185827B1 (de)
GB (1) GB1430675A (de)
IT (1) IT985108B (de)
NL (1) NL165595B (de)
PH (1) PH10737A (de)
SE (1) SE389576B (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59962B2 (ja) * 1973-08-15 1984-01-10 富士写真フイルム株式会社 ジキキロクバイタイヨウフンマツジセイザイリヨウ オヨビ セイゾウホウホウ
JPS5950722B2 (ja) * 1975-12-08 1984-12-10 ティーディーケイ株式会社 キヨウジセイキンゾクアルイハゴウキンリユウシノトクセイレツカボウシホウホウ
US4207092A (en) * 1977-03-03 1980-06-10 E. I. Du Pont De Nemours And Company Acicular α-iron particles, their preparation and recording media employing same
DE2743298A1 (de) * 1977-09-27 1979-04-05 Basf Ag Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen und verfahren zu deren herstellung
US4273807A (en) * 1979-03-19 1981-06-16 E. I. Du Pont De Nemours And Company Acicular α-iron particles and recording media employing same
DE3026696A1 (de) * 1980-07-15 1982-02-18 Basf Ag, 6700 Ludwigshafen Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen mit einem oberflaechenueberzug, verfahren zu deren herstellung sowie ihre verwendung zur herstellung von magnetischen aufzeichnungstraegern
JPS57154618A (en) * 1981-03-19 1982-09-24 Sony Corp Magnetic recording medium
JPS5853022A (ja) 1981-09-24 1983-03-29 Hitachi Maxell Ltd 磁気記録媒体
US4388367A (en) * 1981-09-28 1983-06-14 Xerox Corporation Perpendicular magnetic recording medium and fabrication
JPS58119609A (ja) * 1982-01-11 1983-07-16 Fuji Photo Film Co Ltd 磁気記録媒体
JPS58122623A (ja) * 1982-01-14 1983-07-21 Sony Corp 円盤状磁気記録媒体
JPS595423A (ja) * 1982-07-01 1984-01-12 Sony Corp 磁気記録媒体
JPS5979431A (ja) * 1982-10-29 1984-05-08 Konishiroku Photo Ind Co Ltd 磁気記録媒体
JPS5979432A (ja) * 1982-10-29 1984-05-08 Konishiroku Photo Ind Co Ltd 磁気記録媒体
US4595640A (en) * 1983-12-27 1986-06-17 Minnesota Mining And Manufacturing Company Lubricant system for magnetic recording media containing isomeric acids or alcohols
JPS60184576A (ja) * 1984-03-01 1985-09-20 Daikin Ind Ltd 磁性塗料組成物
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
JPS6379232A (ja) * 1986-09-22 1988-04-09 Victor Co Of Japan Ltd 磁気記録媒体
US5106437A (en) * 1987-11-25 1992-04-21 Minnesota Mining And Manufacturing Company Electromagnetic radiation suppression cover
US5085931A (en) * 1989-01-26 1992-02-04 Minnesota Mining And Manufacturing Company Microwave absorber employing acicular magnetic metallic filaments
US5238483A (en) * 1989-01-27 1993-08-24 Toda Kogyo Corporation Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same
EP0379776B1 (de) * 1989-01-27 1994-10-12 Toda Kogyo Corp. Nadelförmige magnetische Teilchen aus einer Eisenlegierung für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung
US5275880A (en) * 1989-05-17 1994-01-04 Minnesota Mining And Manufacturing Company Microwave absorber for direct surface application
US5238975A (en) * 1989-10-18 1993-08-24 Minnesota Mining And Manufacturing Company Microwave radiation absorbing adhesive
US5189078A (en) * 1989-10-18 1993-02-23 Minnesota Mining And Manufacturing Company Microwave radiation absorbing adhesive
JP2005228369A (ja) * 2004-01-14 2005-08-25 Fuji Photo Film Co Ltd 磁気記録媒体の製造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206338A (en) * 1963-05-10 1965-09-14 Du Pont Non-pyrophoric, ferromagnetic acicular particles and their preparation
JPS5515771B1 (de) * 1967-01-12 1980-04-25
FR1580714A (de) * 1967-09-18 1969-09-05
JPS4839120B1 (de) * 1968-06-11 1973-11-21
US3567525A (en) 1968-06-25 1971-03-02 Du Pont Heat treated ferromagnetic particles
US3632512A (en) * 1969-02-17 1972-01-04 Eastman Kodak Co Method of preparing magnetically responsive carrier particles
US3535104A (en) * 1969-05-23 1970-10-20 Du Pont Ferromagnetic particles containing chromium

Also Published As

Publication number Publication date
IT985108B (it) 1974-11-30
BR7303736D0 (pt) 1974-07-25
NL7306605A (de) 1973-11-26
NL165595B (nl) 1980-11-17
FR2185827A1 (de) 1974-01-04
GB1430675A (en) 1976-03-31
AU450059B2 (en) 1974-06-27
ATA440573A (de) 1979-08-15
AR199569A1 (es) 1974-09-13
PH10737A (en) 1977-08-31
FR2185827B1 (de) 1977-09-02
AT355825B (de) 1980-03-25
US3865627A (en) 1975-02-11
JPS5928964B2 (ja) 1984-07-17
DE2326258A1 (de) 1973-12-13
DE2326258C2 (de) 1982-08-26
SE389576B (sv) 1976-11-08
AU5594473A (en) 1974-06-27
JPS4943604A (de) 1974-04-24

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