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Glossary


Air Gap: A non-magnetic space between the poles of magnets in a magnetic circuit, no matter space is filled with plastic parts or brass or other non-magnetic material.


Anisotropic: The material has preferred magnetized direction determined during the pressing process, it can’t be changed in the magnetizing process.


B/H Curve: The curve graphic generated from plotting the resultant flux density B against the magnetic field H, which represents the qualities of a magnet when magnetized and demagnetized.


Br, Residual Induction: Also called Residual Flux Density, measured in gauss or tesla. The magnetic induction remaining in a magnet compared to zero after it is saturated by the magnetizing field.


Coercive Force, Hc: The value of demagnetizing force, as measured by Oersteds or kA/m, required to reduce the magnetization saturation to zero.


Curie Temperature: The temperature above which magnets become nonmagnetic, losing all magnetic properties.


Demagnetization Force: A magnetizing force, the opposite direction of the magnetic field of a magnet. Which removes magnetic properties from fully magnetized.


Ferrous Metal: Ferrous metals are often magnetic, but not exclusively. The material source or conductor of magnetic flux often contains elements of iron or nickel.


Gaussmeter: An instrument that directly measures the strength of a magnetic field in gauss at any point.


Intrinsic Coercive Force, Hci: The value of resist demagnetization force, as measured by Oersteds or kA/m, shows how stable one magnet is put in a demagnetizing space.


Isotropic: The material doesn’t have magnetized direction determined during the pressing process, thus magnetization through any direction is allowable.


Magnetic Induction: Flux per unit space range of a section normal to the direction of the magnetic path.


Magnetic Saturation: The maximum energy can be achieved that a magnet can put over another magnet.


Grade: The number indicates how strong of magnetic strength with a magnet, generally a higher number means a stronger magnet. For example, the N54 magnet is much stronger than the N35 magnet.


Maximum Energy Product, BHmax: The magnetic field yields when the product of Bd and Hd at the point of maximum energy.


Orientation: Describes the optimum direction of magnetization of an anisotropic, which direction can obtain the magnet’s maximum magnetic properties.



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