JPS57181554A - Magnetic powder for electrophotographic magnetic toner and its manufacture - Google Patents

Magnetic powder for electrophotographic magnetic toner and its manufacture

Info

Publication number
JPS57181554A
JPS57181554A JP56066362A JP6636281A JPS57181554A JP S57181554 A JPS57181554 A JP S57181554A JP 56066362 A JP56066362 A JP 56066362A JP 6636281 A JP6636281 A JP 6636281A JP S57181554 A JPS57181554 A JP S57181554A
Authority
JP
Japan
Prior art keywords
magnetic
powder
iron
fe4n
oxide
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
JP56066362A
Other languages
Japanese (ja)
Other versions
JPS6237780B2 (en
Inventor
Shiro Sato
Mitsuhiro Katayama
Shuichi Miya
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.)
Kanto Denka Kogyo Co Ltd
Original Assignee
Kanto Denka Kogyo Co 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 Kanto Denka Kogyo Co Ltd filed Critical Kanto Denka Kogyo Co Ltd
Priority to JP56066362A priority Critical patent/JPS57181554A/en
Publication of JPS57181554A publication Critical patent/JPS57181554A/en
Publication of JPS6237780B2 publication Critical patent/JPS6237780B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/083—Magnetic toner particles
    • G03G9/0835—Magnetic parameters of the magnetic components
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/083—Magnetic toner particles
    • G03G9/0831—Chemical composition of the magnetic components

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To efficiently manufacture magnetic powder having low hygroscopicity and causing no deterioration in the magnetic characteristics even if allwed to stand at high humidity by reducing and nitriding iron (oxide) with a compound contg. nitrogen and by pulverizing it. CONSTITUTION:Iron (oxide) such as reduced iron powder, electrolytic iron powder or iron oxide is reduced and nitrided at 400-900 deg.C in an atmosphere of a compound contg. nitrogen such as NH3, and it is optionally denitrified. The resulting Fe4N, etc. with high magnetic flux density are pulverized and classified to obtain Fe4N-base magnetic powder for an electrophotographic toner contg. Fe2N2 and Fe3N besides the Fe4N and having <=10mum average grain size and 0.3-15wt% N content. This magnetic powder has about 60-140emu/g magnetic flux density in about 1,000Oe magnetic field, and the magnetic characteristics are hardly deteriorated even if the powder is allowed to stand at 60 deg.C and 90% RH for 2 weeks.
JP56066362A 1981-04-30 1981-04-30 Magnetic powder for electrophotographic magnetic toner and its manufacture Granted JPS57181554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56066362A JPS57181554A (en) 1981-04-30 1981-04-30 Magnetic powder for electrophotographic magnetic toner and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56066362A JPS57181554A (en) 1981-04-30 1981-04-30 Magnetic powder for electrophotographic magnetic toner and its manufacture

Publications (2)

Publication Number Publication Date
JPS57181554A true JPS57181554A (en) 1982-11-09
JPS6237780B2 JPS6237780B2 (en) 1987-08-14

Family

ID=13313657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56066362A Granted JPS57181554A (en) 1981-04-30 1981-04-30 Magnetic powder for electrophotographic magnetic toner and its manufacture

Country Status (1)

Country Link
JP (1) JPS57181554A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090626A2 (en) * 1982-03-26 1983-10-05 Mita Industrial Co. Ltd. Magnetic toner having improved humidity dependency
US5316746A (en) * 1991-02-05 1994-05-31 Kawasaki Steel Corporation High purity iron oxide and method for production hereof
JP2004303821A (en) * 2003-03-28 2004-10-28 Toda Kogyo Corp BOND MAGNET AND METHOD FOR MANUFACTURING Sm-Fe-N BASED MAGNETIC POWDER THEREFOR

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0455574U (en) * 1990-09-18 1992-05-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090626A2 (en) * 1982-03-26 1983-10-05 Mita Industrial Co. Ltd. Magnetic toner having improved humidity dependency
US5316746A (en) * 1991-02-05 1994-05-31 Kawasaki Steel Corporation High purity iron oxide and method for production hereof
JP2004303821A (en) * 2003-03-28 2004-10-28 Toda Kogyo Corp BOND MAGNET AND METHOD FOR MANUFACTURING Sm-Fe-N BASED MAGNETIC POWDER THEREFOR

Also Published As

Publication number Publication date
JPS6237780B2 (en) 1987-08-14

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