烧结钕铁硼永磁体是以金属氧化合物nd2fe14b为基础的稀土永磁材料。相对于al-ni-co系永磁和铁氧体永磁材料，钕铁硼具有极高的磁能积和娇顽力，理论上可等于自身重量的640倍重物。高能量密度的优点使钕铁硼永磁材料在现代工业和电子技术中获得了广泛应用，如：电动机、发电机、核磁共振、磁选机、磁传动、磁悬浮、除铁器、防泄漏（气、水、油）、仪器仪表、医疗器械、音响设备、汽车行业、通讯设备、计算机等行业和领域。

ndfeb is a permanent magnetic material with the metallic composition of nd2fe14b. compared with the casing of permanent magnetic material al-ni-co and permanent magnetic ferrite, ndfeb has stronger coactivity and (bh)max; which can attract heavy objects weighing over six hundred and forty pounds times its weight. its merit of higher energy density results in its wide use in modern industry and electronic technology such as: loudspeakers, high performance steppers, dc′s, servos, linear motors, generators, magnetic resonance′s, magnetic separations, iron removers, magnetic suspension, computer＆car parts, communication equipment, machine meters, wax＆leakage resistance (gas, water, oil and others).