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A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd 2 Fe 14 B tetragonal crystalline structure. [1] They are the most widely used type of rare-earth magnet .
Neodymium also has 15 known metastable isotopes, with the most stable one being 139m Nd (t 1/2 = 5.5 hours), 135m Nd (t 1/2 = 5.5 minutes) and 133m1 Nd (t 1/2 ~70 seconds). The primary decay modes before the most abundant stable isotope, 142 Nd, are electron capture and positron decay , and the primary mode after is beta minus decay .
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. ... Neodymium: 7.007: 41.5 (1.149 55 ...
Penny-sized ferrite magnet: 10 −1 T: decitesla: 100 mT: 1 kG: Penny-sized neodymium magnet: 150 mT: 1.5 kG: Sunspot: 10 0 T tesla 1 T: 10 kG: Inside the core of a 60 Hz power transformer (1 T to 2 T as of 2001) [10] [11] or voice coil gap of a loudspeaker magnet (1 T to 2.4 T as of 2006) [12] 1.5 T to 7 T: 15 kG to 70 kG
[1] [2] During this same time period, John Croat from General Motors (GM) had independently discovered the same Nd 2 Fe 14 B compound. [3] In 1988, Sagawa founded Intermetallics, a research and development company devoted to the development of neodymium magnets. [4] [5] [6] Sagawa founded NDFEB Corporation in 2012, where he is currently president.
Much like the former Alnico 5 magnets, the Neo magnets with a higher percentage of neodymium will lose their magnetic field faster than ones with less Neodymium in the alloy. The drawback of decreasing Neodymium in the magnet is that it will result in heavier magnets, having less magnetic field.
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