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Rare earth permanent magnet materials, main types of _ ndfeb strong magnet manufacturers

by:Newland     2020-04-02
The main kind of rare earth permanent magnet, rare earth permanent magnet material has two kinds big, three generations of products. The first is the rare earth - category Cobalt alloy system ( The RE - Co permanent magnet) , it consists of two generations products. 1996 K. Strant SmCo5 type alloy has a very high magnetic anisotropy abnormal number, produced the first generation of rare earth permanent magnet type 1:5 SmCo alloy. Began the research and development of rare earth permanent magnet materials, and put into production in 1970; The second generation of rare earth permanent magnet type is 2:17 SmCo alloy production is about 1978 years. They are all based on cobalt metal matrix permanent magnet alloy. The second major categories is ndfeb alloy ( The Nd - Fe- B series permanent magnet) 。 Japan and the United States in 1983 also found that the ndfeb alloy, known as the third generation of permanent magnetic material, when a Nd and Fe atoms respectively by different RE atoms and other metals. Atomic substitution can be developed into a variety of different components, different Nd - performance Fe- B department of permanent magnet materials. Its preparation methods mainly include sintering process, restore fast diffusion method, melt quenching method, bonding method, such as casting process, the sintering process and bonding method is the most widely used in the production. The following table lists the different rare earth permanent magnet material of magnetic energy. Material residual flux maximum magnetic energy product magnetic induction coercive force intrinsic coercive force - the Curie temperature 3 / T /卡。 m - 1 /卡。 m - 1 0 / Kj。 SmCo5 m/C is 100. 76 550 680 740 SmCo5 ( High Hc) 160 0. 90 700 1120 740 Sm Co 240 1. 10, 510, 530, 920, 217 series 217 series ( High Hc) 280 0. 95 640 800 920 Sm sintering Nd - Co Fe- Series 240 - B 400 1. 1 - 1. Four 800 - - 310-2400 Bonding Nd - 510 Fe- Department 56 - B 160 0. 6 - 1. 1, 800 - 2100 - Sm - Fe - N is 56-310 160 0. 6 - 1. 1, 600 - - 310-2000 600 can be seen from the table above ndfeb permanent magnet materials of integrated magnetic is best, and the sintering process is superior to the bonding process.
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