Glossary of Neodymium magnets:

• Air Gap- An air-filled gap in a magnetic circuit; the space between the field-magnet poles and the armature;
  
  
• Anisotropic (oriented) magnet – The magnet has a preferred direction of magnetic orientation.
  
  
• Coercive Force, Hc - The demagnetizing force, in oersteds, required to reduce the residual induction, Br, of a fully magnetized magnet to zero. The coercive force, measured in amperes per metre
  
  
• Curie Temperature - Temperature at which a material loses its magnetic properties. The temperature  which a ferromagnetic substance loses its ferromagnetism (magnetic properties) and becomes paramagnetic
  
  
• Flux- A measure of the quantity of magnetism, being the total number of magnetic lines of force passing through a specified area in a magnetic field.
  
  
• Gauss, Gs - Unit of measure of magnetic induction, B, or flux density in the CGS system. A unit of magnetic field intensity equal to to 10-4 tesla.
  
  
• Gauss Meter - An instrument that measure the instantaneous value of the magnetic induction.
  
  
• Magnetic Induction- The process of the material becomes magnetized by a magnetic field. The induced magnetism is produced by the force of the field radiating from the poles of a magnet.
  
  
• Intrinsic Coercive Force, Hci - Oersted measurement of the material’s inherent ability to resist self-demagnetization.
  
  
• Isotropic (non-oriented) Magnet- The magnet has no preferred direction of magnetic orientation, which allows magnetization in any direction.
  
  
• Magnetic Induction, B - Flux per unit area of a section normal to the direction of the magnetic path. Measured in gauss.
  
  
• Magnetic Field- A region around a magnet within which the force of magnetism acts.
  
  
• Magnetic Flux Density- The amount of magnetic flux through a unit area taken perpendicular to the direction of the magnetic flux. Also called magnetic induction.
  
  
• Magnetic Force - The force exerted between magnetic poles, producing magnetization.
  
  
• BHmax - The maximum product of (BdHd) which can be obtained on the demagnetization curve. Hcmax is the maximum of the coercive force, Hcmin is the minimum of the coercive force
  
  
• Maximum Operating Temperature - The maximum temperature of exposure that a magnet can forego without significant long-range instability or structural changes.
  
  
• Neodymium magnets- As the most powerful and affordable type of rare earth magnets, Neodymium magnets is more formally referred to as neodymium-iron-boron (NdFeB) magnets, have the highest magnetic field strength. It is made from Nd, Fe, B and some other microelement. NdFeB magnets have been extensively applied to VCM, Machinery equipment, Linear Motors, Acoustic systems, MRI, Auto industry and so on.
  
  
• North Pole - That magnetic pole which attracts the geographic North Pole.
  
  
• Orientation Direction- The direction that an anisotropic magnet should be magnetized through.
  
  
• Paramagnet- Magnet made of a substance whose magnetization is proportional to the strength of the magnetic field applied to it.
  
  
• Rare Earths Magnet- a strong permanent magnet made from alloys of rare earth elements, or lanthanide and actinide metals, with other metals. Neodymium magnets and Samarium-Cobalt magnets are the two types of rare–earth magnets.
  
  
• Remnant Induction, Bd- The magnetic induction remains in the magnetic circuit after the magnetizing force was removed.
  
  
• Residual Induction, Br - Flux density, measured in gauss, of a magnetic material after being fully magnetized in a closed circuit.
  
  
• Coating—Neodymium magnets without coating are very easy to be corrosive which required surface coating to be protected from the corrosion. Various coating methods could be applied to neodymium magnets as below:
  The coating of NdFeB magnets can be Zn, Ni, Ni-Cu-Ni, Epoxy, CR3+ZN, NI+AG, NI+AU.
  Coating Terms:

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