Neodymium (NdFeB) Magnet, known as the Third-Generation Permanent Magnet, is the most widely used type of Rare-Earth Magnet, and also the strongest type of magnet available commercially.
NdFeB Magnets can be divided into two subcategories – Sintered NdFeB and Bonded NdFeB according to different production processes.
They have replaced other types of magnets in many applications, such as electric motors in cordless tools, hard disk drives , and magnetic fasteners.
Samarium Cobalt (SmCo) magnets, known as the Second Generation of Rare-Earth Magnets, are generally ranked similarly in strength to Neodymium magnets.
Because of their higher coercivity and could survive in higher temperatures & worse environments than NdFeB magnets, they are widely used in Military Industry(such as Radar and Torpedo) and the Aerospace Industry
It can be divided into two subcategories, SmCo5 and Sm2Co17, according to different formulations.
Ferrite Magnets, also called Ceramic Magnets, are known as the First Generation of Permanent Magnet.
Most Ferrites are not electrically conductive, making them useful in applications like magnetic cores for transformers.
It can be divided into two families “Hard Ferrites” & “Soft Ferrites” based on their resistance and magnetic coercivity.
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