Dailymag Neodymium Iron Boron Magnets
Neodymium Iron Boron (NdFeB) Magnets are the world’s strongest permanent magnet because it provides superior permanent magnetic qualities and high-cost performance, unlike traditional magnets. They are widely used in the manufacturing of industrial, medical equipment, home appliances, energy, and transportation-related products.
With many years of design and R&D experience, Dailymag has dedicated itself to the development and manufacturing of high coercive force, low reversible temperature coefficient, and low weight loss NdFeB. It features high-performance consistency and excellent quality. We can provide customers with customized neodymium iron boron magnets and solutions.
Grade: N30-N54
Plating: zinc coat, nickel coat, black epoxy, or customized
Shape: Customized
Uses: Electric equipment, 5G mobile phone, refrigerator, audio, automobile, printer, etc.
Grade: N30-N54
Plating: zinc coat, nickel coat, or black epoxy
Shape: Customized
Uses: VCM, MRI, separator, printer, 5G mobile phone, artwork, audio, motor, etc.
Grade: N35 to N54
Plating: zinc coat, nickel coat, or black epoxy
Shape: Customized
Uses: Automotive electric equipment, separator, motor, audio, 5G mobile, etc.
Grade: N48SH N50SH
Plating: Nicuni coat or customized
Shape: Arc segment
Uses: Electric motor, starter servo motor, generator, electric tools, automobile, printer, etc.
Grade: N48SH N50SH
Plating: Nicuni coated or customized
Shape: Tile
Uses: 5G mobile, electric motor, electric tools, refrigerator, VCM, etc.
Grade: N35-N52
Plating: nickel coat, zinc coat, or Black Epoxy
Shape: Block
Uses: Speakers, artwork, audio, automobile, refrigerator, separator, motor, etc.
Grade: N33H-N46H
Plating: Zinc coat, Black Epoxy, Nickle coat
Shape: Block
Uses: MRI, printer, mobile, speakers, etc.
Grade: N52
Plating: Nickle coat, zinc coat, black epoxy
Size: 60 X 30 X 10
Uses: Artwork, speakers, electric motor, VCM, MRI, motor, automobile, etc.
Diameter: D60 (or custom)
Thickness: T2 T3 T4 T5 T10 T 20 T25 (or custom)
Shape: Round Ring
Uses: Refrigerator, 5G mobile, audio, automobile, etc.
Grade: N35-N52
Shape: Countersink Ring
Magnetization Direction: Axial or Diametrical
Uses: Sensors, separator, 5G mobile, speakers, motor, etc.
Grade: N48
Plating: Nickel coat, zinc coat, black epoxy
Shape: Round Ring
Magnetization Direction: Diametrical or axial
Grade: N35-N52
Diameter: D8 D10 D12 D14 D18 etc. (Customized)
Thickness: T2 T3 T4 T5 T10 T20 T25 (Customized)
Shape: Disc
Grade: N35-N52
Plating: Nickel coat, black epoxy, zinc coat, custom coat
Shape: Disc
Uses: Used in small components like small speakers, sew-in wearing, headphones, and 5G smartphone.
Grade: N35-N52 (or Customized)
Size: D12X25
Shape: Cylinder
Certification: ROSH, SGS, TS16949, ISO14000, ISO9000
Grade: N35 to N52
Plating: nickel coat, black epoxy, or zinc coat
Shape: Irregular
Uses: For smartphone, neodymium magnets are used in voice coil motors because it is small magnet yet powerful at the same time. It can operate the auto-focus system in a second.
Maximum Curie Temperature
The NdFeB or neodymium iron boron magnets have a Curie temperature ranging from around 310 C for 0% cobalt to more than 370 C for 5% cobalt. In addition, neodymium magnets have a relatively high Reversible Temperature Coefficient of Induction, which reduces overall magnetic power as temperature rises.
Because of its corrosion nature, neodymium iron boron magnets have some limitations as well. For that reason, Dailymag provides protective coating or plating for humid conditions. E-coating, powder coating, nickel plating, zinc plating, perylene, and mixtures of these coatings have all been effectively applied to these magnets.
Surface Coatings for Neodymium Iron Boron Magnets
NdFeB magnets with nickel, zinc, or tin plating have good corrosion resistance, although longer lead times or higher volumes may be necessary. Ion vacuum deposition (IVD) techniques can also be used to plate neodymium magnets. This particular plating offers exceptional adherence to the material and is very controllable in thickness.
A number of organic coatings with good corrosion resistance have also been successfully produced for NdFeB. In particularly harsh settings, a combination of coating processes or encapsulating the material in a sealed housing may be preferable.
APPLICATIONS
Dailymag neodymium iron boron magnets are widely used in machinery, video and audio equipment, telecommunication technologies, medical devices, office automation systems, spacecraft and aviation, and many more applications. More than 95% of our products are used in energy-efficient PM motors, particularly Servo Motors, New Energy Vehicles Drive Motors, Compressor Motors, Elevator Motors, High-Speed Motors, Explosion-proof Motors, and so on.
Production Process of Neodymium Iron Boron Magnets
There are two primary processes for producing neodymium iron boron magnets:
Sintered magnet method or traditional powder metallurgy:
Sintered neodymium iron boron magnets are made by melting raw materials in a furnace, casting them into a mould, and cooling them to create ingots. The alloys are ground and milled, and the powder is sintered into dense blocks. After that, the blocks are heat-treated, cut to shape, surface-treated, and magnetized.
Bonded magnet technique or rapid densification:
Melt spinning a narrow ribbon of the NdFeB alloy produces bonded neodymium iron boron magnets. The ribbon is made up of nano-scale Nd2Fe14B grains that are randomly arranged. This ribbon is then pulverized into particles before being combined with a polymer and compression- or injection-molded into bonded magnets.
Higher grades indicate more powerful magnets.
- N30 – N55
- N30M – N50M
- N30H – N50H
- N30SH – N48SH
- N30UH – N42UH
- Greatest energy product (BHmax), magnetic energy density, is defined as the maximum value of magnetic flux density (B) times magnetic field strength (H).
- The temperature at which a substance loses its magnetic is known as the Curie temperature (TC).
- The magnetic field strength is measured by remanence (Br).
- Coercivity (HCI), is the material’s resistance to demagnetization.
Under the following situations, do NOT use Neodymium Iron Boron magnets:
- In an alkaline, corrosive, or chemical solvent
- In either water or oil, unless hermetically sealed
- In an electrically conducting liquid, such as a water-containing electrolyte
- In a hydrogen-containing environment, particularly at high temperatures.
- Corrosive gas environments, such as Cl, NH3, Nox, and so on.
- Extremely powerful.
- Relatively low cost: by weight, about 20x Ferrite magnets, by “Dollar per BHmax,” approximately 1.5x Ferrite magnets
- When compared to alnico and samarium cobalt magnets, it is relatively easy to process.
- Properties deteriorate significantly at temperatures over around 150°C, depending on the grade and permeance coefficient of the magnet.
- Most grades of NdFeB magnets require oxidation protection through coating or plating the magnets.
Neodymium magnets (sometimes called “NdFeB”, “Neo”, or “NIB”) are permanent magnets composed of neodymium, iron, and boron. They belong to the Rare-Earth magnet family and have the most powerful magnetic qualities of any permanent magnet, outperforming Samarium Cobalt (SmCo), Alnico, and Ferrite.
Different alloys, such as NdFeB (neodymium, iron, and boron alloy), retain their domains aligned and are utilized to manufacture permanent magnets.
Neodymium magnets are permanent magnets that lose a percentage of their performance every 100 years if kept in optimum operational conditions.
