JPS54124821A - Permanent magnet material - Google Patents

Permanent magnet material

Info

Publication number
JPS54124821A
JPS54124821A JP3339378A JP3339378A JPS54124821A JP S54124821 A JPS54124821 A JP S54124821A JP 3339378 A JP3339378 A JP 3339378A JP 3339378 A JP3339378 A JP 3339378A JP S54124821 A JPS54124821 A JP S54124821A
Authority
JP
Japan
Prior art keywords
permanent magnet
rare earth
hour
add
amount
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.)
Pending
Application number
JP3339378A
Other languages
Japanese (ja)
Inventor
Tatsuya Shimoda
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP3339378A priority Critical patent/JPS54124821A/en
Publication of JPS54124821A publication Critical patent/JPS54124821A/en
Pending legal-status Critical Current

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  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To keep a high coercive force of permanent magnet even if the amount of Cu to add is small and the amount of Fe to add is great by adding a transition metal such as Ta to a rare earth element-Co-Cu-Fe permanent magnet.
CONSTITUTION: The permanent magnet alloy contains rare earth elements such as Sm, etc., and transition metals such as Co, Cu, Fe, etc., in a proportion of the relationship R[CO1-u-v-w CuuFevMw]q, where R is a rare earth element such as Sm and M is one or two or more transition metals such as Ta, etc., and U is ≤ 0.20, v is 0.01 to 0.60, w is 0.005 to 0.05, and q is 6.5 to 8.8. The alloy ingot with the composition is ground into average 4 micron grain size of particles, molded by press forming, and then sintered at 1200°C for 1 hour. After sintering, it is rapidly cooled in a current of a gas and then heat treated at 800°C for 1 hour and 400°C for 20 hours. Thus permanent magnet of excellent magnetic characteristics can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP3339378A 1978-03-23 1978-03-23 Permanent magnet material Pending JPS54124821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3339378A JPS54124821A (en) 1978-03-23 1978-03-23 Permanent magnet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3339378A JPS54124821A (en) 1978-03-23 1978-03-23 Permanent magnet material

Publications (1)

Publication Number Publication Date
JPS54124821A true JPS54124821A (en) 1979-09-28

Family

ID=12385336

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3339378A Pending JPS54124821A (en) 1978-03-23 1978-03-23 Permanent magnet material

Country Status (1)

Country Link
JP (1) JPS54124821A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS521551A (en) * 1975-03-01 1977-01-07 Daikin Ind Ltd Absorbing type freezer
JPS52111692A (en) * 1976-03-16 1977-09-19 Tdk Corp Permanent magnet material
JPS52141416A (en) * 1977-04-27 1977-11-25 Hitachi Metals Ltd Permanent magnetic alloy
JPS5329223A (en) * 1976-08-31 1978-03-18 Tdk Corp Permanent magnet material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS521551A (en) * 1975-03-01 1977-01-07 Daikin Ind Ltd Absorbing type freezer
JPS52111692A (en) * 1976-03-16 1977-09-19 Tdk Corp Permanent magnet material
JPS5329223A (en) * 1976-08-31 1978-03-18 Tdk Corp Permanent magnet material
JPS52141416A (en) * 1977-04-27 1977-11-25 Hitachi Metals Ltd Permanent magnetic alloy

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