The neodymium magnet, also known as the NdFeB magnet, is a kind of artificial permanent magnet, also the most powerful permanent magnet to date. NdFeB magnets can attract objects up to 640 times their own weight. If divided by shape, the NdFeB magnets can be divided into round magnets, ring magnets, rectangular magnets, square magnets, and irregular magnets, etc. If divided according to their production process, NdFeB magnets can be divided into bonded NdFeB magnets and sintered NdFeB magnets. Bonded NdFeB magnets vs sintered NdFeB magnets, what’s the difference between them? In this article, we will try to find the differences between bonded NdFeB magnets and sintered NdFeB magnets.
Bonded NdFeB Magnets
Bonded NdFeB magnet, composed of Nd2Fe14B, is a synthetic magnet. Bonded NdFeB magnets are magnets made of rapidly quenched NdFeB magnetic powder and binder by “compression molding” or “injection molding”.
Bonded NdFeB magnets have high dimensional accuracy, can be made into magnetic components with relatively complex shapes, and have the characteristics of one-time molding and multi-polar orientation. The bonded NdFeB magnets have high mechanical strength and can be formed at one time with other supporting components during forming.
Thanks to their low cost, high dimensional accuracy, the large degree of freedom in shape, good mechanical strength, and light specific gravity, bonded NdFeB magnets are widely used in office automation equipment, Denso machinery, audiovisual equipment, instrumentation, small motors and metering machinery, mobile phones, CD-ROM, DVD-ROM drive motors, hard disk spindle motors HDD, other micro special DC motors and automated instruments and other fields. Their annual growth rate has reached 35%.
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