JPS6444006A - Rare earth, iron resin-bonded magnet - Google Patents
Rare earth, iron resin-bonded magnetInfo
- Publication number
- JPS6444006A JPS6444006A JP62201451A JP20145187A JPS6444006A JP S6444006 A JPS6444006 A JP S6444006A JP 62201451 A JP62201451 A JP 62201451A JP 20145187 A JP20145187 A JP 20145187A JP S6444006 A JPS6444006 A JP S6444006A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- thickness
- powder
- phenol resin
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract 6
- 229910052742 iron Inorganic materials 0.000 title abstract 3
- 229910052761 rare earth metal Inorganic materials 0.000 title abstract 3
- 150000002910 rare earth metals Chemical class 0.000 title abstract 3
- 239000005011 phenolic resin Substances 0.000 abstract 4
- 239000000843 powder Substances 0.000 abstract 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052796 boron Inorganic materials 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 abstract 2
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- 239000011347 resin Substances 0.000 abstract 2
- 229920005989 resin Polymers 0.000 abstract 2
- 229920001187 thermosetting polymer Polymers 0.000 abstract 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 abstract 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 abstract 1
- 239000004312 hexamethylene tetramine Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE:To obtain a magnet which cuts air, moisture, solvent and chemicals and prevents oxidation by covering the surface of a magnet, which is formed by adding a thermosetting resin to magnet powder obtained by a superquick cooling method from rare earth metals, iron and boron and then compressing such powder, with a phenol resin. CONSTITUTION:The surface of a magnet, which has been manufactured by adding a thermosetting resin to magnet powder which has the basic composition consisting of rare earth, iron and boron obtained by a superquick cooling method and compressing such powder, is covered with the phenol resin in the thickness of 0.1-50mum. The phenol resin used has been obtained by reaction of phenol and aldehyde such as formalin under the acidic or alkali catalyst as indicated by the formula I. Such phenol resin shows hardening reaction as indicated by the formula II when it is directly heated or heated under the existence of hexamethylenetetramine. Since it is difficult to attain reliability due to generation of nonuniform layer if the thickness of covering is 0.1mum or less, the thickness is set to 0.1mum or more. Meanwhile, if the thickness exceeds 50mum, the processing time becomes longer, resulting in rise of cost and therefore it is undesirable. Therefore, a magnet which assures high oxidation resistance, excellent stability of magnetic flux and high reliability can be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62201451A JPS6444006A (en) | 1987-08-12 | 1987-08-12 | Rare earth, iron resin-bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62201451A JPS6444006A (en) | 1987-08-12 | 1987-08-12 | Rare earth, iron resin-bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6444006A true JPS6444006A (en) | 1989-02-16 |
Family
ID=16441305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62201451A Pending JPS6444006A (en) | 1987-08-12 | 1987-08-12 | Rare earth, iron resin-bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6444006A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050125024A1 (en) * | 2000-06-29 | 2005-06-09 | Concentric Medical, Inc., A Delaware Corporation | Systems, methods and devices for removing obstructions from a blood vessel |
| US20070198051A1 (en) * | 2003-01-30 | 2007-08-23 | Ev3 Inc. | Embolic filters having multiple layers and controlled pore size |
| US20100076452A1 (en) * | 2000-06-29 | 2010-03-25 | Ivan Sepetka | Systems, methods and devices for removing obstructions from a blood vessel |
| JP2011508635A (en) * | 2007-12-26 | 2011-03-17 | ラザラス エフェクト， インコーポレイテッド | Recovery system and method of use |
-
1987
- 1987-08-12 JP JP62201451A patent/JPS6444006A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050125024A1 (en) * | 2000-06-29 | 2005-06-09 | Concentric Medical, Inc., A Delaware Corporation | Systems, methods and devices for removing obstructions from a blood vessel |
| US20100076452A1 (en) * | 2000-06-29 | 2010-03-25 | Ivan Sepetka | Systems, methods and devices for removing obstructions from a blood vessel |
| US20070198051A1 (en) * | 2003-01-30 | 2007-08-23 | Ev3 Inc. | Embolic filters having multiple layers and controlled pore size |
| JP2011508635A (en) * | 2007-12-26 | 2011-03-17 | ラザラス エフェクト， インコーポレイテッド | Recovery system and method of use |
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