高性能永磁材料的发展（Development of high performance permanent magnetic materials）.docVIP

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高性能永磁材料的发展（Development of high performance permanent magnetic materials）.doc

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高性能永磁材料的发展（Development of high performance permanent magnetic materials）

高性能永磁材料的发展（Development of high performance permanent magnetic materials） The development of high performance permanent magnetic materials Hits: 151 release date: 2010-11-14 Provider: Jiangsu Taifeng Machinery Co. Ltd. data size: Picture type: Download: 0 times Data type: browse times: 151 times Related products: Detailed introduction: Permanent magnetic materials development rapidly in recent years, the existing aluminum nickel cobalt ferrite, and three kinds of rare earth permanent magnet. Rare earth permanent magnet and the first generation of SmCo 1:5, second generation 2:17 and third NdFeB smco. Aluminum nickel cobalt permanent magnetic material is the successful development of the century in 30s, although it has the advantages of high remanence strength, good thermal stability, but its low coercivity, anti demagnetization ability, but also to use precious metal cobalt, the high cost of these problems greatly limit its application in motor. Ferrite magnet is a permanent magnet material developed at the beginning of this century in 50s, its biggest feature is the low price, high coercive force, which is the lack of remanence and energy product are low strength. Samarium cobalt rare earth permanent magnet material coming out in the middle of 60s, it has the remanence strength of aluminum nickel cobalt as high coercivity, ferrite is high, but the high price of samarium materials. Appearance of Nd-Fe-B permanent magnetic materials at the beginning of 80s, it has high remanence strength, high coercivity, high magnetic energy product, these characteristics, especially suitable for use in motor. It is the lack of temperature coefficient, low Curie point, easy to rust and coating treatment. After a few years of continuous improvement, most of these shortcomings have been overcome, the work of the highest temperature of Nd-Fe-B permanent magnetic materials have been up to 180 DEG C, generally up to 150 DEG C, has been sufficient to meet the most requirements of the motor