Neodymium Iron Boron ring magnet
Nd-Fe-B permanent magnet is manufactured in a wide range of shapes, sizes and grades according customer's demand.
NdFeB has a very high energy product and coercivity, can pick up 660 times of own weight of heavy objects.
The advantage is high cost-effective, with good mechanical properties, easy cutting; according customer's demand to manufacture in a wide range of shapes, sizes and grades.
The shortcoming is easy to rust, oxidation, so the Sintered NdFeB's surface is usually required for plating such as zinc, nickel, copper,silver, gold, etc., can also be done phosphorus treatment or spray epoxy resin to slow down the oxidation rate.
Pic shows the magnet with blue-white coating and the grade is UH,it means max working temperature is 180 degree.
Grade | Residual Induction | Coercive Force | Intrinsic Coercive Force | Maximum Energy Product | Maximum Operating Temperature | ||||
Br | Hcb | Hcj | (BH)max | Tw | |||||
T | KGS | KA/m | KOe | KA/m | KOe | KJ/m3 | MGOe | ℃ | |
N28UH | 1.04-1.08 | 10.4-10.8 | 780-812 | 9.8-10.2 | ≥1990 | ≥25 | 207-223 | 26-28 | ≤180 |
N30UH | 1.08-1.12 | 10.8-11.2 | 804-844 | 10.1-10.6 | ≥1990 | ≥25 | 223-239 | 28-30 | ≤180 |
N33UH | 1.14-1.17 | 11.4-11.7 | 820-876 | 10.3-11.0 | ≥1990 | ≥25 | 247-263 | 31-33 | ≤180 |
N35UH | 1.17-1.21 | 11.7-12.1 | 860-907 | 10.8-11.4 | ≥1990 | ≥25 | 263-279 | 33-35 | ≤180 |
N38UH | 1.22-1.26 | 12.2-12.6 | 860-907 | 10.8-11.4 | ≥1990 | ≥25 | 287-303 | 36-38 | ≤180 |
N40UH | 1.26-1.29 | 12.6-12.9 | 860-907 | 10.8-11.4 | ≥1990 | ≥25 | 289-303 | 38-40 | ≤180 |
Note: The above mentioned data of magnetic parameters and physical are given at 20℃±2℃
How to judge the Permanent magnet material properties advantages and disadvantages of standard?
The main physical properties of sintered NdFeB
magnetic properties | Parameters |
Density /g.cm3 Vickers Hardness HV Resistivity /υΩ.cm Compressive strength/N.mm-2 Coefficient of Thermal Expansion (C⊥)/K-1 Coefficient of Thermal Expansion (C∥) /K-1 | 7.45 570 150 780 -4.8X10-6 -3.4X10-6 |
How to judge the Permanent magnet material properties advantages and disadvantages of standard?
You can see 3 terms:
1)the magnet -crystalline anisotropy,
2)the magnetization strong
3)the Curie temperature.
We listed the details of rare earth magnet material for your reference and you can according your demand to choose which fit your design.
Type | composition | Magnetic properties | ||||
Br/T | Hc /(Ka/m) | (BH)m/ (kJ/m3) | Tc/℃ | Density g/cm-3 | ||
Sinter NdFeB | Nd13.5(Fe,M)bananceB6.1-7.0 | 1.1-1.4 | 800-2400 | 240-400 | 310-510 | 7.4-7.6 |
Bonded NdFeB | Nd4-13(Fe,M)bananceB6-12 | 0.6-1.1 | 800-2100 | 56-160 | 310 | 5.3-6.0 |
AlNiCo 5 | 8%-12%Al,15%-22%Ni 5%-24%Co,3%-6%Cu. Balance Fe | 0.7-1.32 | 40-60 | 9-56 | 890 | 7.3 |
AlNiCo8 | 7%-8%Al,14%-15%Ni 34%-36%Co,5%-8%Ti, 3%-4%Cu,Balance Fe | 0.3-0.44 | 250-350 | 25-36 | 450 | 7.3 |
1:5,SmCo | 62%-63%Co,38%-37%Sm | 0.9-1.0 | 1100-1540 | 117-179 | 720 | 8.1 |
2:17,SmCo | Sm(Co0.69Fe0.2Cu0.1Zr0.01)7.2 | 1.0-1.3 | 500-600 | 230-240 | 800 | 8.2 |
Bonded smco | Sm(Co0.67Fe0.22Cu0.1Zr0.07Ti0.01)7.1 | 1.0-1.07 | 800-1400 | 160-204 | 810 | 7.4 |
APPLICATION:
instrumentation,
electro-acoustic motor,
magnetic magnetization device
micro motors,
electronic industry,
automobile industry,
petrochemicals,
nuclear magnetic resonance device,
sound device magnetic suspension system,
magnetic transmission machine
magneto therapy equipment
high performance motors,
brushless DC motors,
generators,
magnetic separation,
magnetic resonance imaging,
sensors
loudspeakers
headphones,
hearing aids,
voice coil motors,
