At the technical level, we help customers reasonably and correctly select the type, grade, size and surface treatment of the magnets, provide various test results for reference, and provide professional packaging. Even provide more magnetic application solutions.
Magnetization Of Permanent Magnets
Surface Treatment Of Neodymium Magnet And The Characteristics Of Various Coatings
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 |
Silver | Ni+Cu+Ag | 10-20 | 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 | ||||
Parylene | Parylene | 5-20 | Grey | Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved |
Chemical | Ni | 10-20 | Silver Grey | Excellent Against Humidity |
Physical Properties Of Sintered Neodymium Magnet
Parameter | International Unit | Standard Data |
Curie Temperature(Tc) | ℃ | 310-380 |
Maximum Operating Temperature(Tw) | ℃ | 80-230 |
Hardness | Hv | 620 |
Electrical Resistivity (ᵨ) | Ω.cm | 1.8x10⁻⁴ ~2.0x10⁻⁴ |
Density(D) | g/m³ | 7.45~-7.65 |
Recoil Permeability(µ rec) | 1.05 | |
Magnetization Field Strength(Hs) | kA/m | ≧2400 |
kOe | ≧30 | |
Bending Strength | Mpa | 295-345 |
Temp. Coefficient of Br | ％℃ | -0.11~-0.12 |
Temp.Coefficient of Hcj | ％℃ | -0.5~-0.7 |
Standard Shapes And Specifications of Various Permanent Magnets
Common Magnet Shapes And Expressions Of Different Shapes
According to the actual needs, magnetic materials can be processed into different shapes. The common shapes mainly include round(disc and cylinder)magnet, square(block)magnet,ring magnet and arc magnet. Magnets with different shapes have different expression methods.
You can also buy irregular shapes (also called special-shaped magnets) from us, which including countersunk magnets, sphere magnets, cone magnets, heart-shaped magnets, star-shaped magnets, flower-shaped magnets,clasp magnets.
