JPS6413704A - Resin-bonded permanent magnet and manufacture thereof - Google Patents
Resin-bonded permanent magnet and manufacture thereofInfo
- Publication number
- JPS6413704A JPS6413704A JP62170488A JP17048887A JPS6413704A JP S6413704 A JPS6413704 A JP S6413704A JP 62170488 A JP62170488 A JP 62170488A JP 17048887 A JP17048887 A JP 17048887A JP S6413704 A JPS6413704 A JP S6413704A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- oxidation
- coating
- binder
- rare earth
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000006249 magnetic particle Substances 0.000 abstract 4
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 230000003647 oxidation Effects 0.000 abstract 3
- 238000007254 oxidation reaction Methods 0.000 abstract 3
- 238000002161 passivation Methods 0.000 abstract 3
- 239000011230 binding agent Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 229910000765 intermetallic Inorganic materials 0.000 abstract 2
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 abstract 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 150000004767 nitrides Chemical class 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 229920003002 synthetic resin Polymers 0.000 abstract 1
- 239000000057 synthetic resin Substances 0.000 abstract 1
- 229910052723 transition metal Inorganic materials 0.000 abstract 1
- 150000003624 transition metals Chemical class 0.000 abstract 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE:To prevent oxidation/deterioration of a magnet during manufacturing or use by forming a fine oxidation-resistant surface coating by forced oxidation of magnetic particle surfaces of an intermetallic compound. CONSTITUTION:A passivation agent is brought into contact to intermetallic compound magnetic particles base of which is a rare earth metal expressed in R-Fe-B (R is Nd and/or Pr, or a part thereof is replaced with one or more types of rare earth elements) and transition metals. A passivation coating is thereby formed over the magnetic particle surfaces. The base of a compound is immobilized coating forming magnetic particles and a synthetic resin as a binder. After the compound is compression molded, a molding is completed by curing the binder. As the passivation agent, it is desirable to use one or more than two of chromic acid, bichromate, nitric acid, permanganic acid, nitride, permanganate, molybdate and tungstate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170488A JPS6413704A (en) | 1987-07-08 | 1987-07-08 | Resin-bonded permanent magnet and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62170488A JPS6413704A (en) | 1987-07-08 | 1987-07-08 | Resin-bonded permanent magnet and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413704A true JPS6413704A (en) | 1989-01-18 |
Family
ID=15905886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62170488A Pending JPS6413704A (en) | 1987-07-08 | 1987-07-08 | Resin-bonded permanent magnet and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413704A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02250303A (en) * | 1989-03-24 | 1990-10-08 | Furukawa Electric Co Ltd:The | Manufacture of plastic magnet |
| JPH0311704A (en) * | 1989-06-09 | 1991-01-21 | Kanegafuchi Chem Ind Co Ltd | Bonded magnet and manufacture thereof |
| JPH0487305A (en) * | 1990-07-31 | 1992-03-19 | Sankyo Seiki Mfg Co Ltd | Rare earth bonded magnet |
| JP4678118B2 (en) * | 2000-07-17 | 2011-04-27 | 日立金属株式会社 | Coated R-T-B magnet and method for manufacturing the same |
-
1987
- 1987-07-08 JP JP62170488A patent/JPS6413704A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02250303A (en) * | 1989-03-24 | 1990-10-08 | Furukawa Electric Co Ltd:The | Manufacture of plastic magnet |
| JPH0311704A (en) * | 1989-06-09 | 1991-01-21 | Kanegafuchi Chem Ind Co Ltd | Bonded magnet and manufacture thereof |
| JPH0487305A (en) * | 1990-07-31 | 1992-03-19 | Sankyo Seiki Mfg Co Ltd | Rare earth bonded magnet |
| JP4678118B2 (en) * | 2000-07-17 | 2011-04-27 | 日立金属株式会社 | Coated R-T-B magnet and method for manufacturing the same |
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