烧结钕铁硼磁铁是一种有色磁性材料,由于其具有优异的磁性能、耐热性和耐腐蚀性,被广泛应用于电机、变频器、空调、电视、电脑和其他电子设备中。烧结钕铁硼磁铁的制备方法包括烧结和氧化烧结。
烧结法——烧结法的基本原理是将铁粉、钕粉、硼粉和其他添加剂混合,放入高温灶中,在高温下烧结成磁性材料。烧结过程中,钕粉在烧结温度范围内熔融,分散在铁粉中,形成磁性材料。烧结后的钕铁硼磁铁具有较高的磁性能,但有一定的烧结温度要求,烧结温度过高会导致铁粉形成多孔结构、磁性损失和烧结块脆性。
氧化烧结法——氧化烧结法是在烧结过程中,加入适量的氧化剂,在氧化剂的作用下,形成一层氧化膜,使烧结后的钕铁硼磁铁表面光洁,具有良好的磁性能。氧化烧结法可以提高烧结块的强度,降低烧结温度,减少烧结时间,节约能源。
Sintered neodymium-iron-boron magnet is a kind of colored magnetic material, which is widely used in motors, frequency converters, air conditioners, televisions, computers and other electronic devices because of its excellent magnetic properties, heat resistance and corrosion resistance. The preparation of sintered neodymium-iron-boron magnet includes sintering and oxidation sintering.
Sintering method - the basic principle of sintering method is to mix iron powder, neodymium powder, boron powder and other additives into a high-temperature furnace and sinter them into magnetic materials at high temperature. During sintering, neodymium powder melts and disperses in iron powder to form magnetic materials within the sintering temperature range. The sintered neodymium-iron-boron magnet has high magnetic properties, but there is a certain sintering temperature requirement. If the sintering temperature is too high, the iron powder will form a porous structure, magnetic loss and sintered block brittleness.
Oxidation sintering method - oxidation sintering method is to add a proper amount of oxidant in the sintering process, and under the action of the oxidant, a oxide film is formed on the surface of the sintered neodymium-iron-boron magnet, which makes the surface of the sintered neodymium-iron-boron magnet smooth and has good magnetic properties. Oxidation sintering method can improve the strength of sintered block, reduce sintering temperature, reduce sintering time and save energy.
常州钕铁硼磁铁是一种新型的磁性材料,具有良好的热稳定性和高磁饱和度,因此在电机、电子电器、航天航空等领域有着广泛的应用。近年来,常州钕铁硼磁铁市场价格一直保持稳定,价格变动不大。2018年,常州钕铁硼磁铁的价格维持在11000元/吨左右,2019年价格也维持在11000元/吨左右,2020年上半年因产能过剩和出口减少,价格稳步下跌,最低跌到了10000元/吨,但随着国内市场复苏,价格又稳步上涨,最高达到了11500元/吨。现在,常州钕铁硼磁铁的价格也都在11000元/吨左右,在2020年下半年价格也有望稳步上涨。