Flexible Magnets for Micro-Motor
Flexible Magnets for Micro-Motor are thermoplastic permanent Ferrite Magnets with Enjoying characteristics of satisfactory magnetic property , mechanic property , chemical corrosion resisting
Property ,strict size precision and good consistency , it is widely used in motors of TV antenna ,CD player , VCD player and tape rewinder , etc.
PHYSICAL&MAGNETIC PROPERTIES OF FLEXIBLE MAGNETS FOR MICRO-MOTORS
| YXZY-4C | YXZY-4N | ||
Magneticproperty
|
Residual induction Br(T) | 0.24-0.25 | 0.23-0.25 |
| Coercive force Hcb(kA/m) | 159-183 | 159-183 | |
| Intrinsic coercive force Hcj(kA/m) | >=200 | >=239 | |
| Maximum energy product(BH)max(kJ/m3) | 11.1-11.9 | 10.7-11.9 | |
| Adhesive agent components | Chlorinated polyethylene | Butyronitrile rubber | |
| Appearance | The face:clean and polish on polish ;no bubble ;no scuffing ; Upper and below edge is vertical ; fracture is smooth. |
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| Tolerance | Length +0.2mm width +0.1mm thickness +0.05(or according to the contract requirement) | ||
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Physical property |
Tensile strength(Mpa) | >=7 | >=7 |
| Elongation rate(%) | >=100 | >=100 | |
| Hardness(SHA) | >=88 | >=86 | |
| Density(g/cm3) | 3.6-3.7 | 3.6-3.7 | |
Temperature(  ) |
-40-100 | -40-100 | |
| Winding character | Contract value | ||
| Thermal expansion coefficient | 28 x 10-5/ |
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Corrosion
Resisting Property |
10%HCl |  |
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| 20%HCl | |
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| 10%H2SO4 |  |
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| 20%H2SO4 | |
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| absolute ethly alcohol | |
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| methylbenzene |  |
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| gasoline | |
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| benzene | |
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| acetone | |
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| 28% ammonia water | |
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| engine oil | |
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| excellent good bad |
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