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AMT&C NINGBO,LLC
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Sintered Neodymium Rare Earth Magnets
| Price: | 0.1~10.0 USD |
| Payment Terms: | T/T |
| Place of Origin: | Zhejiang, China (Mainland) |
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Product Detail
Sintered Neodymium Rare Earth Magnets for sale
Sintered Neodymium Permanent Magnet Overview
Sintered neodymium magnets for sale is the most powerful permanent magnet in the contemporary. The coercive force of Sintered NdFeB is very high and its Bhmax is about ten times of that of Ferrite magnet. It can support about 640 times of its weight. As its fairly good mechanical properties, it can be processed into many different shapes or with various holes. Some of its products with high-perfomance can work under the situation up to 200. However, it is easy to be rusted for its elements.Therefore we should make surface treatment in terms with different requirements, such as zinc-coated,Nickel-coated,Ag-coated,Au-coated,Epoxy-coated etc.
At present we can manufacture the sintered NdFeB in a range of physical grades like following table. And we can realize different shapes such as disc magnets, ring magnes,rectangle magnets, arc segment magnets and some other special shaped magnets.
At present we can manufacture the sintered NdFeB in a range of physical grades like following table. And we can realize different shapes such as disc magnets, ring magnes,rectangle magnets, arc segment magnets and some other special shaped magnets.
Physical properties of Sintered NdFeB Magnets.
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Surface Treatment
The corrosion resistance of NdFeB is considered poor. Painting, coating, or plating is therefore highly recommended for neodymium magnets for sale. Plating NdFeB is a difficult process, and commercial plating plants are unlikely to be able to achieve plating with good adhesion. Nickel, Zinc, or Tin plating provides good corrosion resistance for NdFeB magnets. We are also able to make cadmium chromate or aluminum chromate as NdFeB coating by using vacuum deposition techniques. A variety of organic coatings have also been successfully developed for NdFeB, exhibiting good corrosion resistance characteristics. Especially in harsh environments, it may be advisable to use a combination of coating techniques, or to encapsulate the material in a sealed housing.
The coating of sintered NdFeB magnet and its corrosion resistance: | |||||||
Coating | Zn | Ni | Ni-Cu-Ni + Epoxy | Electro- phoresis | NiCuNi+(Sn or Au or Ag,Cr) | Chromate | |
White | Colour | Double layers | |||||
Corrosion resistance | Good | Excellent | Excellent | Excellent | Very good | Very good | good |
Magnetizing and Handling
All neodymium magnets for sale require extremely high magnetizing fields and special consideration must be given to this when designing complex assemblies, if it is intended to magnetize after assembly. We will recommand right magnetic direction for you in accord with your requirements.
Rare Earth materials are mechanically weak, and magnetically very strong. They must therefore be handled very carefully to avoid damage and injury during personnel handling the magnets. Receiving and assembly personnel should be warned about the of handling magnetized Rare Earth magnets.
Rare Earth materials are mechanically weak, and magnetically very strong. They must therefore be handled very carefully to avoid damage and injury during personnel handling the magnets. Receiving and assembly personnel should be warned about the of handling magnetized Rare Earth magnets.
Dimension Range of Sintered NdFeB: | ||||||
Length (OD) mm | Width (ID) mm | ThickF1.ss mm | ||||
Min. | Max. | Min. | Max. | Min. | Max. | |
Block | 1 | 150 | 1 | 100 | 0.5 | 150 |
Ring | 1 | 150 | 1 | 140 | 0.6 | 50 |
Disc/Bar | 1 | 150 | 0.6 | 50 | ||
Length | Chord Length | |||||
Min. | Max | Min. | Max. | |||
Segment | 3 | 50 | 5 | 150 | ||
If you need magnets with any special shape and dimensions , please feel free to contact us and we will try to help you.
Eguiped automatic machining eguipments,We will supply customers all shapes of magnets according to customers reguirement.
Bonded Neodymium Magnets for sale
Bonded Neodymium Permanent Magnet Overview
Bonded Neodymium magnets are manufactured by binding rapid-quenching NdFeB powder. The powder is mixed with resin to form a magnet by compression molding or injection molding. The bonded NdFeB Magnets material can be produced with close tolerances of tool, with little or no finishing required. The energy product of the bonded form is much lower than that of the sintered form - up to 10 MGOe. The bonded NdFeB is isotropic and can be magnetized in any direction, and with multiple poles.
Compression Molding Bonded NdFeB
Compression - this is a technique whereby a special form of NdFeB powder is blended with a plastic carrier material, die pressed and then heated. Parts made in this way can be of complex shapes and come off the tool with close tolerances, requiring no further finish machining.
Injection Molding Bonded NdFeB
Injection - NdFeB powder is blended with a plastic material and injection molded. The resulting parts have energy products in the 5 MGOe range, but can be made with extremely intricate shapes. Injection molded magnets are available using ferrite, neodymium-iron-boron, or blends of magnetic materials to achieve an extensive range of properties. The finished parts can be either very simple or complex in geometry. The injection molded magnet has a high mechanical strength and may be molded together with other matching parts.
Pressing adhesive performance parameters table NdFeB
Grade | BNP-6 | BNP-8L | BNP-8 | BNP-8SR | BNP-8H | BNP-9 | BNP-10 | BNP-11 | BNP-11L | BNP-12L |
B r T(Gs) | 0.55-0.62 | 0.60-0.64 | 0.62-0.69 | 0.62-0.66 | 0.61-0.65 | 0.65-0.70 | 0.68-0.72 | 0.70-0.74 | 0.70-0.74 | 0.74-0.80 |
H CB kA/m(kOe) | 285-370 (3.6-4.6) | 360-400 (4.5-5.0) | 385-445 (4.8-5.6) | 410-465 (5.2-5.8) | 410-455 (5.2-5.7) | 400-440 (5.0-5.5) | 420-470 (5.3-5.9) | 445-480 (5.6-6.0) | 400-440 (5.0-5.5) | 420-455 (5.3-5.7) |
H CJ kA/m(kOe) | 600-755 (7.5-9.5) | 715-800 (9-10) | 640-800 (8-10) | 880-1120 (11-14) | 1190-1440 (15-18) | 640-800 (8-10) | 640-800 (8-10) | 680-800 (8.5-10) | 520-640 (6.5-8) | 520-600 (6.5-7.5) |
(BH) max kJ/m 3 (MGOe) | 44-56 5.5-7 | 56-64 7.0-8.0 | 64-72 8.0-9.0 | 64-72 8.0-9.0 | 64-72 8.0-9.0 | 70-76 8.8-9.5 | 76-84 9.5-10.5 | 80-88 10.0-11.0 | 78-84 9.8-10.5 | 84-92 10.5-11.5 |
D g/cm 3 | 5.5-6.1 | 5.6-6.1 | 5.8-6.1 | 5.8-6.1 | 5.9-6.2 | 5.8-6.1 | 5.8-6.1 | 5.8-6.1 | 5.8-6.1 | 5.8-6.1 |
r | 1.15 | 1.15 | 1.15 | 1.13 | 1.15 | 1.22 | 1.22 | 1.22 | 1.26 | 1.26 |
B r %/ | -0.13 | -0.13 | -0.13 | -0.13 | -0.07 | -0.12 | -0.11 | -0.11 | -0.11 | -0.08 |
T w | 100 | 110 | 120 | 150 | 125 | 120 | 120 | 120 | 110 | 110 |
Injection Molding NdFeB magnetic properties and physical characteristics
Grade | BNI-3 | BNI-4 | BNI-5 | BNI-6 | BNI-6H | BNI-7 | BNI-5SR (PPS) |
B r T (Gs) | 0.2-0.4 | 0.40-0.46 | 0.45-0.51 | 0.51-0.56 | 0.48-0.56 | 0.54-0.64 | 0.45-0.50 |
H CB kA/m(kOe) | 120-240 (1.5-3.0) | 250-335 (3.1-4.2) | 280-360 (3.5-4.5) | 295-375 (3.7-4.7) | 335-400 (4.2-5.0) | 320-400 (4.0-5.0) | 300-360 (3.8-4.5) |
H CJ kA/m(kOe) | 480-640 (6.0-8.0) | 575-735 (7.2-9.2) | 640-800 (8-10) | 640-800 (8-10) | 1035-1355 (13-17) | 640-800 (8-10) | 875-1115 (11-14) |
(BH)max kJ/m 3 (MGOe) | 8-24 (1.0-3.0) | 28-36 (3.5-4.5) | 37-44 (4.6-5.5) | 44-52 (5.5-6.5) | 40-52 (5.0-6.5) | 51-59 (6.5-7.5) | 36-44 (4.5-5.5) |
D g/cm 3 | 3.9-4.4 | 4.2-4.9 | 4.5-5.0 | 4.7-5.1 | 4.8-5.2 | 5.0-5.5 | 4.9-5.4 |
r | 1.2 | 1.2 | 1.2 | 1.13 | 1.13 | 1.13 | 1.13 |
B r %/ | -0.15 | -0.13 | -0.13 | -0.11 | -0.15 | -0.11 | -0.13 |
T w | 100 | 110 | 120 | 120 | 130 | 120 | 150 |
Surface Treatment
Epoxy coating is mostly common used for bonded NdFeB magnets.
Neodymium Magnets for sale Machining
Bonded NdFeB is easily machined. Coolants must be used while machining this material in order to avoid spontaneous combustion of powder. Machining this material removes a layer of protective coating, and re-coating for corrosion resistance may be necessary.
Magnetizing and Handling
Isotropic bonded NdFeB materials can be magnetized in any direction, or with multiple poles. Special magnetizing fixtures are required in order to achieve multiple pole magnetization. Such multiple pole fixtures may cost several thousand dollars depending on complexity of design and production rate requirements.
Temperature Effects
Magnetic properties of NdFeB deteriorate rapidly above about 130 Centigrade, depending on the grade of material, and the permeance coefficient of the magnet in operation. The higher the permeance coefficient the magnet operates at, the higher the temperature it will withstand. High Hci NdFeB materials operating at a high permeance coefficient can operate to about 210 Centigrade. Shapes, Sizes, and Grades Available Isotropic bonded NdFeB can be specially formulated to meet special requirements, with energy products from 1 to 10MGOe, as required.
Dimension range of Plastic Bonded NdFeB | ||||||
Length mm (Outer Diameter) | Width mm (Inner Diameter) | Thickness mm | ||||
Min. | Max. | Min. | Max. | Min. | Max. | |
Block | 5.0 | 100 | 5.0 | 100 | 0.8 | 50 |
Ring | 5 | 100 | 3 | 95 | 0.8 | 50 |
The above table is only for reference. Any questions, please feel free to contact us.
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Company Info
AMT&C NINGBO,LLC [China (Mainland)]
Business Type:Manufacturer, Trading Company
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)
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