NdFeB permanent magnet

cylindricalrectangulararc

Permanent magnets have become indispensable in today’s technology-focused world. The many different magnetic materials and their manifold characteristics have firmly established permanent magnets as important elements in countless application fields. In addition to the proven materials ferrite and AlNiCo, modern magnets are also made from rare earth materials such as neodymium-iron-boron and samarium-cobalt. Even small magnets made from these materials offer strong magnetic force and thereby cater to the growing demand for smaller and stronger magnets. Permanent magnets also play a key role in the growing field of automation technology, where it is essential to continue the development of drives, actuators and sensors. A particular leap in the direction of future technologies was the discovery of the new materials samarium-cobalt and neodymium-iron-boron. Neodymium-iron-boron (NdFeB) is a material that is composed of the rare earth metal neodymium (Nd), iron (Fe) and boron (B). Magnets made from neodymium-iron-boron are often just called neodymium magnets; they boast the highest energy density of all magnetic materials and are used in applications that require extreme forces in the smallest possible space. Permanent magnets made from neodymium can often be worked to conform with the desired geometry, which allows for the production of small quantities at reasonable prices. When used in open spaces, it is recommended to apply metallic or non-metallic coatings to the NdFeB magnets in order to prevent corrosion and use them at higher temperatures of up to 200 °C (392 °F).