JPS57140307A - Manufacture of metallic nitride powder for magnetic recording - Google Patents

Manufacture of metallic nitride powder for magnetic recording

Info

Publication number
JPS57140307A
JPS57140307A JP56025077A JP2507781A JPS57140307A JP S57140307 A JPS57140307 A JP S57140307A JP 56025077 A JP56025077 A JP 56025077A JP 2507781 A JP2507781 A JP 2507781A JP S57140307 A JPS57140307 A JP S57140307A
Authority
JP
Japan
Prior art keywords
manufacture
nitride powder
gaseous mixture
metallic nitride
magnetic recording
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
JP56025077A
Other languages
Japanese (ja)
Other versions
JPH0123402B2 (en
Inventor
Shintaro Suzuki
Munehiko Takahashi
Yoshimi Moriya
Yuichi Omote
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 JP56025077A priority Critical patent/JPS57140307A/en
Publication of JPS57140307A publication Critical patent/JPS57140307A/en
Publication of JPH0123402B2 publication Critical patent/JPH0123402B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To manufacture the titled metallic nitride powder made essentially of Fe4N and free from sintering among the particles by bringing H2 and NH3 into contact with iron oxide or the like while changing the mixing ratio as the reaction proceeds.
CONSTITUTION: Iron oxide such as α-Fe2O3 or iron oxyhydroxide such as α- FeOOH (A) is brought into contact with a gaseous mixture (B) of H2 with NH3 at about 350W550°C and reacted to form Fe4N. The material (A) may be impregnated or coated with a metallic compound of Co, Ni or the like. In the early stage of said reaction a gaseous mixture contg. ≥50% H2 preferably in <0.05vol. ratio of NH3/H2 is used, and as the reaction proceeds, the percentage of H2 is reduced. In the final stage a gaseous mixture contg. ≥50% NH3 preferably in 1W10vol. ratio of NH3/H2 is used.
COPYRIGHT: (C)1982,JPO&Japio
JP56025077A 1981-02-23 1981-02-23 Manufacture of metallic nitride powder for magnetic recording Granted JPS57140307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56025077A JPS57140307A (en) 1981-02-23 1981-02-23 Manufacture of metallic nitride powder for magnetic recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56025077A JPS57140307A (en) 1981-02-23 1981-02-23 Manufacture of metallic nitride powder for magnetic recording

Publications (2)

Publication Number Publication Date
JPS57140307A true JPS57140307A (en) 1982-08-30
JPH0123402B2 JPH0123402B2 (en) 1989-05-02

Family

ID=12155856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56025077A Granted JPS57140307A (en) 1981-02-23 1981-02-23 Manufacture of metallic nitride powder for magnetic recording

Country Status (1)

Country Link
JP (1) JPS57140307A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144035A (en) * 1983-02-07 1984-08-17 Hitachi Maxell Ltd Magnetic recording medium
JPS59154640A (en) * 1983-02-23 1984-09-03 Hitachi Maxell Ltd Magnetic recording medium
JPS59228705A (en) * 1983-06-10 1984-12-22 Hitachi Ltd Vertical magnetic recording medium and manufacture of the same
JPS60247822A (en) * 1984-05-24 1985-12-07 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS62271403A (en) * 1986-05-20 1987-11-25 Taiyo Yuden Co Ltd Nitrided iron system magnetic powder
JP2005268389A (en) * 2004-03-17 2005-09-29 Dowa Mining Co Ltd Iron-nitride magnetic powder and its manufacturing method
JP2007036027A (en) * 2005-07-28 2007-02-08 Dowa Holdings Co Ltd Magnetic powder suitable for low noise medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114450679A (en) 2020-05-27 2022-05-06 松下电器（美国）知识产权公司 Abnormality detection system and abnormality detection method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039300A (en) * 1973-08-10 1975-04-11
JPS5151796A (en) * 1974-10-31 1976-05-07 Sony Corp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039300A (en) * 1973-08-10 1975-04-11
JPS5151796A (en) * 1974-10-31 1976-05-07 Sony Corp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144035A (en) * 1983-02-07 1984-08-17 Hitachi Maxell Ltd Magnetic recording medium
JPH0568008B2 (en) * 1983-02-07 1993-09-28 Hitachi Maxell
JPS59154640A (en) * 1983-02-23 1984-09-03 Hitachi Maxell Ltd Magnetic recording medium
JPS59228705A (en) * 1983-06-10 1984-12-22 Hitachi Ltd Vertical magnetic recording medium and manufacture of the same
JPS60247822A (en) * 1984-05-24 1985-12-07 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS62271403A (en) * 1986-05-20 1987-11-25 Taiyo Yuden Co Ltd Nitrided iron system magnetic powder
JP2005268389A (en) * 2004-03-17 2005-09-29 Dowa Mining Co Ltd Iron-nitride magnetic powder and its manufacturing method
JP4534059B2 (en) * 2004-03-17 2010-09-01 Ｄｏｗａエレクトロニクス株式会社 Iron nitride magnetic powder and method for producing the same
JP2007036027A (en) * 2005-07-28 2007-02-08 Dowa Holdings Co Ltd Magnetic powder suitable for low noise medium

Also Published As

Publication number Publication date
JPH0123402B2 (en) 1989-05-02

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