NdFeB Magnet
NdFeB magnet is mainly made of Neodymium, Iron and Boron,with excellent magnetic property, abundant raw material and reasonable prices, NdFeB Magnet can be used as an ideal magnet in mini-motor, Permanent magnet instrument, electronic industry, auto industry, petro-Chemical industry, nuclear magnetic resonance, sound device magnetic suspension system,magnetic transmission machine and iatrical apparatus and etc. For NdFeB, its surface is usually treally treatd with some special methods.
The surface treatment method include Zine, Nickel, Tin, Silver, Gold plating, Phosphor and Spray Epoxy Resin etc.
The surface treatment method include Zine, Nickel, Tin, Silver, Gold plating, Phosphor and Spray Epoxy Resin etc.
| Surface | Type | Minimal layer thickness | Surface Color | Remarks |
| Passivation | <=1µ | Silver grey | Temperary Protection | |
| Nickel coating | Ni+Ni | 10-20µ | Silver semibright | Excellent resistance to humid atmosphere |
| Ni+Cu+Ni | Superior resistance to humid atmosphere | |||
| Zinc coating | Zn | 8-20µ | Blue whiteshining color shining | Good resistance to salt spray |
| C-Zn | Excellent resistance to salt spray | |||
| Tin coating | Ni+Cu+Sn | 15-20µ | Silver semibright | Superior resistance to humid atmosphere |
| Gold coating | Ni+Cu+Au | 10-20µ | Gold shining | Superior resistance to humid atmosphere |
| Cupper coating | Ni+Cu | 10-20µ | Gold shining | Temporary treatment |
| Epoxy | Ni+Cu+Epoxy | 15-25µ | Black | Excellent climatic and salt spray resistance |
| Zn+Epoxy | ||||
| Chemical Coating | Ni | 10-20 | Silver semibright | Excellent resistance to humid atmosphere |
NdFeB Physical Properties
| Temp.Coeff.of Br: | -0.11% / •C | Temp.Coeff.of iHc: | -0.60% / •C |
| Density: | 7.4-7.6g/cm3 | Curie Temperature: | 310-340•C |
| Vickers Hardness: | 600HV | Electrical Resistivity: | 144 |
| Tensile Strength: | 8kg/mm2 | Flexural Strength: | 25kg/mm |
| Specific Heat: | 0.12kcal/(kg.•C) | Coef.of Thermal Expansion: | 4x10-6 |
| Thermal conductivity: | 7.7kcal/m.h.•C | ||
| Young¡¯s Modulus: | 1.6x1011N/m2 | Rigidity: | 0.64N/m2 |
| Poisson¡¯s Ratio: | 0.24 | Compressibility: | 9.8x10-12 m2/N |
NdFeB Magnet Related Keywords : ndfeb magnets , bonded ndfeb magnet ,
Other related category :Ferrite Magnet,Cast AlNiCo Magnet,SmCo Magnet,Rubber Magnet,Flexible Magnet,Magnetic Assemblies,
Other related category :Ferrite Magnet,Cast AlNiCo Magnet,SmCo Magnet,Rubber Magnet,Flexible Magnet,Magnetic Assemblies,
