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Mag Applications |
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| Frequent Asked Questions | ||
What is "Neodymium"? Neodymium (Nd) is an element. In the periodic table, Nd is found in the lanthanide, or "Rare Earth" section. Nd is only one of the necessary components in an NdFeB magnet. The other important parts are: Fe or iron. and a trace amount of B or boron. Neodymium magnets are smaller, stronger and cheaper than the rest of the magnets and get the most "Bang For Your Buck". What metals are magnets attracted to? Magnets attract to ferrous metals such as iron, nickel, cobalt, certain steels and other alloys. Brass, aluminum, copper, and most stainless steels, however, are non ferrous. What are magnetic fields? Magnetic fields are moving electrical charges that attract and repel one another. Why is the grade of a magnet important? The grade of a magnet (N35, N38, N40, N45, etc) is important because it specifies the quality of material used to construct the magnet. Usually the higher the grade of the magnet, the greater the magnetic strength. What is induction? Induction is a term used to define how changing magnetic fields generate electric currents. This process happens when copper is exposed to changing magnetic fields, it then "induces" an electrical current. What is an electromagnet? An electromagnet is a magnet with magnetic force that is generated by passing an electrical current through a copper wire when the wire is wound into a coil. An electromagnet can be made stronger simply by adding a stronger electrical current to the coil. Anisotropic (orientation) - The material has a preferred direction of magnetic field. Coercive Force/Hc - The demagnetizing force, in oersteds, required to reduce the residual induction, Br, of a fully magnetized magnet to zero. Curie Temperature - Temperature at which a material loses its magnetic properties. Gauss - Unit of measure of magnetic induction, B, or flux density in the CGS system. Intrinsic Coercive Force, Hci - Oersted measurement of the material's inherent ability to resist self-demagnetization. Isotropic (non-oriented) - The material 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. Maximum Energy Product, BHmax - The maximum product of (BdHd) which can be obtained on the demagnetization curve. Maximum Operating Temperature - The maximum temperature of exposure that a magnet can forego without significant long-range instability or structural changes. North and South Pole - Each magnet is built in with a North pole and a south pole. If you break a magnet into a smaller piece, a new pair of N and S poles will ocur. N pole attracts the geographic North Pole. Residual Induction, Br - Flux density, measured in gauss, of a magnetic material after being fully magnetized in a closed circuit. |
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