CA1021148A - Cobalt and zinc ferrites and magnetic recording tape thereof - Google Patents

Cobalt and zinc ferrites and magnetic recording tape thereof

Info

Publication number
CA1021148A
CA1021148A CA176,361A CA176361A CA1021148A CA 1021148 A CA1021148 A CA 1021148A CA 176361 A CA176361 A CA 176361A CA 1021148 A CA1021148 A CA 1021148A
Authority
CA
Canada
Prior art keywords
cobalt
magnetic recording
recording tape
zinc ferrites
ferrites
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
CA176,361A
Other languages
English (en)
Other versions
CA176361S (en
Inventor
Irwin Gordon
John W. Robinson
Eric F. Hockings
Grzegorz Kaganowicz
John L. Cooper
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of CA1021148A publication Critical patent/CA1021148A/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
    • 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
    • G11B5/70678—Ferrites
    • 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
    • G11B5/714—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 dimension of the magnetic particles
CA176,361A 1972-09-07 1973-07-13 Cobalt and zinc ferrites and magnetic recording tape thereof Expired CA1021148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28692672A 1972-09-07 1972-09-07

Publications (1)

Publication Number Publication Date
CA1021148A true CA1021148A (en) 1977-11-22

Family

ID=23100740

Family Applications (1)

Application Number Title Priority Date Filing Date
CA176,361A Expired CA1021148A (en) 1972-09-07 1973-07-13 Cobalt and zinc ferrites and magnetic recording tape thereof

Country Status (11)

Country Link
JP (1) JPS547076B2 (enExample)
AU (1) AU469886B2 (enExample)
BE (1) BE804556A (enExample)
CA (1) CA1021148A (enExample)
DE (1) DE2343701A1 (enExample)
ES (1) ES418329A1 (enExample)
FR (1) FR2198908B1 (enExample)
GB (1) GB1436135A (enExample)
IT (1) IT993890B (enExample)
NL (1) NL7312283A (enExample)
SE (1) SE393889B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916403A1 (de) 1979-04-23 1980-11-06 Basf Ag Nadelfoermiges magnetisches eisenoxid und verfahren zu seiner herstellung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654163A (en) * 1968-02-27 1972-04-04 Sony Corp Cobalt ferrite magnetic powder for tape recording

Also Published As

Publication number Publication date
AU5959273A (en) 1975-02-27
JPS547076B2 (enExample) 1979-04-03
IT993890B (it) 1975-09-30
JPS4969103A (enExample) 1974-07-04
DE2343701A1 (de) 1974-03-14
SE393889B (sv) 1977-05-23
GB1436135A (en) 1976-05-19
FR2198908A1 (enExample) 1974-04-05
AU469886B2 (en) 1976-02-26
FR2198908B1 (enExample) 1978-11-10
BE804556A (fr) 1974-01-02
NL7312283A (enExample) 1974-03-11
ES418329A1 (es) 1976-03-16

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