Top level Sintered NdFeb Magnetic Products
ndfeb neodymium permanent magnet, ring shaped magnet 1) Strong magnetic force 2) High intrinsic coercive force
Feature of sintered ndfeb magnetic:
1) Material: Sintered/bonded Neodymium-Iron-Boron;
2) Grade:N33-N52,33M-48M,33H-48H,30SH-45SH,30UH-38UH and 30EH-35EH;29AH-34AH,28/30TH
3) Shape: ring,block,disc,bar and so on;
4) Size: according to customers' request;
5) Coating: Expoxy Resin Ni
6) Application: sensors,motors, rotors, wind turbines,wind generators, loudspeakers,magnetic holder, filters automobiles and so on.
The table below compares the magnetic performance of neodymium magnets with other types of permanent magnets.
Magnet | Mr (T) | Hci (kA/m) | BHmax (kJ/m3) | TC (°C) |
Nd2Fe14B (sintered) | 1.0–1.4 | 750–2000 | 200–440 | 310–400 |
Nd2Fe14B (bonded) | 0.6–0.7 | 600–1200 | 60–100 | 310–400 |
SmCo5 (sintered) | 0.8–1.1 | 600–2000 | 120–200 | 720 |
Sm(Co, Fe, Cu, Zr)7 (sintered) | 0.9–1.15 | 450–1300 | 150–240 | 800 |
Alnico (sintered) | 0.6–1.4 | 275 | 10–88 | 700–860 |
Sr-ferrite (sintered) | 0.2–0.4 | 100–300 | 10–40 | 450 |
sical and mechanical properties
Comparison of sical properties of sintered neodymium and Sm-Co magnets | ||
Property | Neodymium | Sm-Co |
Remanence (T) | 1–1.3 | 0.82–1.16 |
Coercivity (MA/m) | 0.875–1.99 | 0.493–1.59 |
Permeability | 1.05 | 1.05 |
Temperature coefficient of remanence (%/K) | –0.12 | –0.03 |
Temperature coefficient of coercivity (%/K) | –0.55..–0.65 | –0.15..–0.30 |
Curie temperature (°C) | 320 | 800 |
Density (g/cm3) | 7.3–7.5 | 8.2–8.4 |
CTE, magnetizing direction (1/K) | 5.2×10–6 | 5.2×10–6 |
CTE, normal to magnetizing direction (1/K) | –0.8×10–6 | 11×10–6 |
Flexural strength (N/mm2) | 250 | 150 |
Compressive strength (N/mm2) | 1100 | 800 |
Tensile strength (N/mm2) | 75 | 35 |
Vickers hardness (HV) | 550–650 | 500–550 |
Electrical resistivity (Ω·cm) | (110–170)×10–6 | 86×10–6 |
SICAL PROPERTIES OF SINTERED NdFeB
Temp.Coeff.of Br | -0.09~-0.11%/? | Specific Heat | 0.12Kcal/(kg,?) | ||||
Density | 7.4-7.6g/cm3 | Young’s Modulus | 1.6x1011N/m2 | ||||
Vickers hardness | 600Hv | Poisson’s Ratio | 0.24 | ||||
Tensile Strength | 8.0Kg/mm2 | Curie Temperature | 310~340? |
Temp.Coeff.of Hc | -0.50~-0.60%/? | Thermal Conductivity | 7.7Kcal/(m.h.?) | ||||
Electrical Resistivity | 114μΩ.cm | Rigidity | 0.64N/m2 | ||||
Flexural Strength | 25Kg/mm | Compressibility | 9.8x10-12m2/N | ||||
Coeff. Of Thermal Expansion | 4x10-6/? | Relative recoil permeabilityμrev | 1.05 |
Introduction of sintered ndfeb magnetic: 1,Metal injection molding, made from the stainless steel, tungsten, Iron-base alloy, tool steel, hard metal alloy. 2,Rare earth magnet, including sintered Neodymium-Iron-Boron, bonded Neodymium-Iron-Boron, sintered Samarium-Cobalt. All magnets are supplied in a wide range of shapes such as: rectangular blocks, discs, rings and segments. 3,Ferrite magnet: Hard ferrite magnet and soft ferrite magnet including the MnZn and NiZn. 4,Die-cast component, made from zinc, aluminum, magnesium alloys.
Picture of sintered ndfeb magnetic:
Other quality management SPC dada statistics., Advanced inspection equipments, Staff education, APQP FMEA , PPAP , SPC , MSA , 6 sigma , MIL-STD M105E Standard Ac=0 Sampling Method ( Zero Defect Plan ) , Traceable lot naming method .
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1.Drawings or samples (offering both will be preferred).
2.Purchasing quantity.
3.Materials and other requirements.