NdFeB Ring Magnet D20 X D10 X 2mm N42H Coating Zn Direction Of Texture
| Physical Properties of Sintered Neodymium Magnet |
| Temp. Coeff. of Br |
Normal: -0.12%/℃ |
Temp. Coeff. of Hc |
Normal:-0.72~ -0.65%/℃ |
| Tgrade: -0.11%/℃ |
Tgrade:-0.65~ -0.50%/℃ |
| LT grade: < -0.10%/℃ |
LT grade: < -0.50%/℃ |
| Density |
7.4~7.6g/cm3 |
Electrical Resistivity |
114 µ Ω . cm |
| Vickers hardness |
600Hv |
Thermal Conductivity |
8.95W/m . k |
| Curie Temperature |
310~340℃ |
Relative recoil permeability µ rev |
1.05 |
| Some Coatings of Sintered Neodymium Magnets |
| Surface |
Coating |
Thickness (Microns) |
Color |
Resistance |
| Passivation |
|
1 |
Silver Grey |
Temporary Protection |
| Nickel |
Ni+Ni |
10-20 |
Bright Silver |
Excellent against Humidity |
| Ni+Cu+Ni |
| Zinc |
Zn |
8-20 |
Bright Blue |
Good Against Salt Spray |
| C-Zn |
Shinny Color |
Excellent Against Salt Spray |
| Tin |
Ni+Cu+Sn |
15-20 |
Silver |
Superior Against Humidity |
| Gold |
Ni+Cu+Au |
10-20 |
Gold |
Superior Against Humidity |
| Copper |
Ni+Cu |
10-20 |
Gold |
Temporary Protection |
| Epoxy |
Epoxy |
15-25 |
Black
Red
Grey
|
Excellent Against Humidity & Salt Spray |
| Ni+Cu+Epoxy |
| Zn+Epoxy |
| Chemical |
Ni |
10-20 |
Silver Grey |
Excellent Against Humidity |
| Parylene |
Parylene |
5-20 |
Grey |
Excellent Against Humidity, Salt Spray.
Superior Against Solvents, Gases,
Fungi and Bacteria.
|
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