JPS56104411A - High frequency ferrite with negative temperature coefficient - Google Patents

High frequency ferrite with negative temperature coefficient

Info

Publication number
JPS56104411A
JPS56104411A JP731180A JP731180A JPS56104411A JP S56104411 A JPS56104411 A JP S56104411A JP 731180 A JP731180 A JP 731180A JP 731180 A JP731180 A JP 731180A JP S56104411 A JPS56104411 A JP S56104411A
Authority
JP
Japan
Prior art keywords
ferrite
temperature coefficient
negative temperature
high frequency
entire
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.)
Granted
Application number
JP731180A
Other languages
Japanese (ja)
Other versions
JPH026203B2 (en
Inventor
Tadashi Kotani
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.)
Hitachi Metals Ltd
Original Assignee
Nippon Ferrite Ltd
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 Nippon Ferrite Ltd filed Critical Nippon Ferrite Ltd
Priority to JP731180A priority Critical patent/JPS56104411A/en
Publication of JPS56104411A publication Critical patent/JPS56104411A/en
Publication of JPH026203B2 publication Critical patent/JPH026203B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Ceramics (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

PURPOSE:To obtain the negative temperature coefficient in the high frequency ferrite over an entire using humidity range by substituting a part of Fe2O3 of Ni-Co ferrite for Al2O3. CONSTITUTION:A part of Fe2O3 of Ni-Co ferrite is substituted for Al2O3 to increase the negative temperature coefficient thereof. It can be expressed as chemical formula by NixCoy (Fe1-alphaAlalpha)2O4, where 0.8<=x<=1.2, 0.01<=y<=0.03, 1.8<=z<=2.2, x+y+z=3, 0<alpha<=0.4. It is also effective for ferrite containing Bi2O3, SiO2 in a predetermined range. This ferrite is useful for the core of a magnetic core coil used for a high frequency communication circuit, has negative temperature coefficient over the entire using temperature range and can ideally compensate the temperature of the entire circuit.
JP731180A 1980-01-24 1980-01-24 High frequency ferrite with negative temperature coefficient Granted JPS56104411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP731180A JPS56104411A (en) 1980-01-24 1980-01-24 High frequency ferrite with negative temperature coefficient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP731180A JPS56104411A (en) 1980-01-24 1980-01-24 High frequency ferrite with negative temperature coefficient

Publications (2)

Publication Number Publication Date
JPS56104411A true JPS56104411A (en) 1981-08-20
JPH026203B2 JPH026203B2 (en) 1990-02-08

Family

ID=11662451

Family Applications (1)

Application Number Title Priority Date Filing Date
JP731180A Granted JPS56104411A (en) 1980-01-24 1980-01-24 High frequency ferrite with negative temperature coefficient

Country Status (1)

Country Link
JP (1) JPS56104411A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444877A2 (en) * 1990-02-28 1991-09-04 Kabushiki Kaisha Toshiba Electrical resistor element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444877A2 (en) * 1990-02-28 1991-09-04 Kabushiki Kaisha Toshiba Electrical resistor element
US5182540A (en) * 1990-02-28 1993-01-26 Kabushiki Kaisha Toshiba Electrical resistor element and method of manufacturing the same

Also Published As

Publication number Publication date
JPH026203B2 (en) 1990-02-08

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