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Neodymium magnet

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43: 271: 71: 279: 1179: 1163: 1343:) and as part of the closing mechanism of modern sport parachute equipment. They are the main metal in the formerly popular desk-toy magnets, "Buckyballs" and "Buckycubes", though some U.S. retailers have chosen not to sell them because of child-safety concerns, and they have been banned in Canada for the same reason. While a similar ban has been lifted in the United States in 2016, the minimum age requirement advised by the 945: 991:) decreases as temperature increases. Neodymium-iron-boron magnets have high coercivity at room temperature, but as the temperature rises above 100 °C (212 °F), the coercivity decreases drastically until the Curie temperature (around 320 °C or 608 °F). This fall in coercivity limits the efficiency of the magnet under high-temperature conditions, such as in wind turbines and hybrid vehicle motors. 35: 20: 1171: 713: 1331: 1133:
Corporation of Japan announced their development of a new method of sintering neodymium magnet material. The method exploits an "organic/inorganic hybrid technology" to form a clay-like mixture that can be fashioned into various shapes for sintering. It is said to be possible to control a non-uniform
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This vulnerability is addressed in many commercial products by adding a protective coating to prevent exposure to the atmosphere. Nickel, nickel-copper-nickel and zinc platings are the standard methods, although plating with other metals, or polymer and lacquer protective coatings, are also in use.
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The greater forces exerted by rare-earth magnets create hazards that may not occur with other types of magnet. Neodymium magnets larger than a few cubic centimeters are strong enough to cause injuries to body parts pinched between two magnets, or a magnet and a ferrous metal surface, even causing
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output per unit volume. Higher values indicate stronger magnets. For sintered NdFeB magnets, there is a widely recognized international classification. Their values range from N28 up to N55 with a theoretical maximum at N64. The first letter N before the values is short for neodymium, meaning
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Sintered Nd-magnets are prepared by the raw materials being melted in a furnace, cast into a mold and cooled to form ingots. The ingots are pulverized and milled; the powder is then sintered into dense blocks. The blocks are then heat-treated, cut to shape, surface treated and
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has sponsored a Rare Earth Alternatives in Critical Technologies (REACT) program, to develop alternative materials. In 2011, ARPA-E awarded 31.6 million dollars to fund Rare-Earth Substitute projects. Because of its role in permanent magnets used for
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grains which are aligned in a powerful magnetic field during manufacture so their magnetic axes all point in the same direction. The resistance of the crystal lattice to turning its direction of magnetization gives the compound a very high
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and ferrite magnets in many of the myriad applications in modern technology where strong permanent magnets are required, because their greater strength allows the use of smaller, lighter magnets for a given application. Some examples are:
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boron atoms do not contribute directly to the magnetism but improve cohesion by strong covalent bonding. The relatively low rare earth content (12% by volume, 26.7% by mass) and the relative abundance of neodymium and iron compared with
1384:. These cranes lift ferrous materials like steel plates, pipes, and scrap metal using the persistent magnetic field of the permanent magnets without requiring a continuous power supply. Magnetic cranes are used in scrap yards, 1338:
The greater strength of neodymium magnets has inspired new applications in areas where magnets were not used before, such as magnetic jewelry clasps, keeping up foil insulation, children's magnetic building sets (and other
145:, neodymium magnets are the strongest type of permanent magnet available commercially. They have replaced other types of magnets in many applications in modern products that require strong permanent magnets, such as 441:, which were the first type of rare-earth magnet to be commercialized. In practice, the magnetic properties of neodymium magnets depend on the alloy composition, microstructure, and manufacturing technique employed. 1148:
tons in a "company-by-company" build-up done in 2013. China produces more than 95% of rare earth elements and produces about 76% of the world's total rare-earth magnets, as well as most of the world's neodymium.
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in its electron structure as opposed to (on average) 3 in iron. In a magnet it is the unpaired electrons, aligned so that their spin is in the same direction, which generate the magnetic field. This gives the
262:. This perspective has been criticized for failing to recognize that most wind turbines do not use permanent magnets and for underestimating the power of economic incentives for expanded production. 2370: 1435:
type monitors at a greater distance than other types of magnet. In some cases, chipped magnets can act as a fire hazard as they come together, sending sparks flying as if they were a lighter
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orientation of the magnetic field in the sintered material to locally concentrate the field, for instance to improve the performance of electric motors. Mass production is planned for 2017.
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This magnetic energy value is about 18 times greater than "ordinary" ferrite magnets by volume and 12 times by mass. This magnetic energy property is higher in NdFeB alloys than in
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Magnets that get too near each other can strike each other with enough force to chip and shatter the brittle magnets, and the flying chips can cause various injuries, especially
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magnets, and the related production processes by founding Magnequench in 1986 (Magnequench has since become part of Neo Materials Technology, Inc., which later merged into
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Gauder, D. R.; Froning, M. H.; White, R. J.; Ray, A. E. (15 April 1988). "Elevated temperature study of Nd-Fe-B–based magnets with cobalt and dysprosium additions".
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pinched between two magnets, causing injury or death. Also this could be a serious health risk if working with machines that have magnets in or attached to them.
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J. J. Croat; J. F. Herbst; R. W. Lee; F. E. Pinkerton (1984). "Pr-Fe and Nd-Fe-based materials: A new class of high-performance permanent magnets (invited)".
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of a sintered magnet. This type of corrosion can cause serious deterioration, including crumbling of a magnet into a powder of small magnetic particles, or
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sintered NdFeB magnets. Letters following the values indicate intrinsic coercivity and maximum operating temperatures (positively correlated with the
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The strength and magnetic field homogeneity on neodymium magnets has also opened new applications in the medical field with the introduction of open
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Chinese manufacturers have become a dominant force in neodymium magnet production, based on their control of much of the world's rare-earth mines.
2748: 2753: 3425: 2306: 2218:"A rare metal called neodymium is in your headphones, cellphone and electric cars like Tesla's Model 3 — and China controls the world's supply" 1508: 2785: 1576:
M. Sagawa; S. Fujimura; N. Togawa; H. Yamamoto; Y. Matsuura (1984). "New material for permanent magnets on a base of Nd and Fe (invited)".
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I.Harrison, K.Warwick and V.Ruiz (2018), "Subdermal Magnetic Implants: An Experimental Study", Cybernetics and Systems, 49(2), 122-150.
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has identified a need to find substitutes for rare-earth metals in permanent magnet technology and has funded such research. The
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Neodymium magnets are used as a surgically placed anti-reflux system which is a band of magnets surgically implanted around the
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Brown, D; Ma, Bao-Min; Chen, Zhongmin (2002). "Developments in the processing and properties of NdFeB-type permanent magnets".
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The stronger magnetic fields can be hazardous to mechanical and electronic devices, as they can erase magnetic media such as
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Nd-Fe-B powder is bound in a matrix of a thermoplastic polymer to form the magnets. The magnetic alloy material is formed by
2605: 2414: 2127: 2018: 298:, but only at low temperatures, below 19 K (−254.2 °C; −425.5 °F). However, some compounds of neodymium with 2570: 1711: 246: 355:
but is very difficult to magnetize in other directions. Like other magnets, the neodymium magnet alloy is composed of
258:, it has been argued that neodymium will be one of the main objects of geopolitical competition in a world running on 3243: 2778: 2478: 274:
Neodymium magnets (small cylinders) lifting steel spheres. Such magnets can lift thousands of times their own weight.
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In process industries, powerful neodymium magnets are used to catch foreign bodies and protect product and processes
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B compound almost simultaneously in 1984. The research was initially driven by the high raw materials cost of
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B crystal structure can be described as alternating layers of iron atoms and a neodymium-boron compound. The
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The Dependence of Magnetic Properties and Hot Workability of Rare Earth-Iron-Boride Magnets Upon Composition
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Photomicrograph of NdFeB. The jagged edged regions are the metal crystals, and the stripes within are the
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onto a water-cooled drum. This metal ribbon is crushed to a powder and then heat-treated to improve its
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have been developed that have higher Curie temperature, allowing them to tolerate higher temperatures.
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Neodymium has a negative coefficient, meaning the coercivity along with the magnetic energy density (
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NdFeB magnets can be classified as sintered or bonded, depending on the manufacturing process used.
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The strength of neodymium magnets is the result of several factors. The most important is that the
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of magnetic fields, though this is an experimental procedure only popular among biohackers and
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in A·m). This means a crystal of the material preferentially magnetizes along a specific
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on a glass plate displays the strong magnetic field of the neodymium magnet underneath.
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Neodymium is used as a magnetic crane which is a lifting device that lifts objects by
416:, this magnetic phase has the potential for storing large amounts of magnetic energy ( 3965: 3902: 3771: 3578: 3399: 3071: 3066: 2729: 2706: 2657: 2638: 2615: 2474: 1973: 1865: 1818: 1556: 1488: 1458: 1262: 1098: 1017: 867: 814: 542: 485: 466: 372: 311: 295: 131: 59: 2654:
Permanent Magnet and Electromechanical Devices: Materials, Analysis and Applications
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B nano-scale grains. This ribbon is then pulverized into particles, mixed with a
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These neodymium magnets corroded severely after five months of weather exposure.
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than many other types of magnets. Special neodymium magnet alloys that include
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General Motors (GM) and Sumitomo Special Metals independently discovered the Nd
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B magnets. Hitachi has held more than 600 patents covering neodymium magnets.
4010: 3437: 2577: 2161: 1822: 1268: 1118:. The powder is mixed with a polymer to form a mouldable putty, similar to a 1078: 1012: 307: 177: 75: 16:
Strongest type of permanent magnet from an alloy of neodymium, iron and boron
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of neodymium magnets are produced officially each year in China, and 80,000
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a thin ribbon of the NdFeB alloy. The ribbon contains randomly oriented Nd
3180: 2737: 2371:"TAVAC Safety and Effectiveness Analysis: LINX® Reflux Management System" 2131: 1813: 1440: 1428: 1424: 1420: 1215: 1162: 1130: 924: 453: 2236:"How its made - Neodymium magnets كيفية صناعة المغناطيسات الخارقة القوة" 1549:
Lucas, Jacques; Lucas, Pierre; Le Mercier, Thierry; et al. (2014).
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In its pure form, neodymium has magnetic properties—specifically, it is
2128:"World's First Magnetic Field Orientation Controlling Neodymium Magnet" 1703: 1461: – Strong permanent magnet made from alloys of rare-earth elements 1409: 1389: 1370: 1250: 992: 765: 520: 493: 481: 361: 318: 314:
well above room temperature. These are used to make neodymium magnets.
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Handbook of Modern Sensors: Physics, Designs, and Applications, 4th Ed
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Typical Physical and Chemical Properties of Some Magnetic Materials
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Journal of Achievements in Materials and Manufacturing Engineering
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There are two principal neodymium magnet manufacturing methods:
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is now 14, and there are now new warning label requirements.
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crystalline structure. They are the most widely used type of
1455: – Searching in outdoor waters for ferromagnetic objects 1436: 115: 103: 2242:
from the original on 2021-12-21 – via www.youtube.com.
1122:. This is pelletised for storage and can later be shaped by 725:
Comparison of physical properties of sintered neodymium and
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makes neodymium magnets lower in price than the other major
34: 303: 111: 19: 2287:"Feds file suit against Buckyballs, retailers ban product" 1548: 1515:. Adams Magnetic Products. October 5, 2012. Archived from 1330: 2576:. U.S. Consumer Product Safety Commission. Archived from 1727:"Pentagon Loses Control of Bombs to China Metal Monopoly" 1724: 1334:
Neodymium magnet spheres assembled in the shape of a cube
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Standard Specifications for Permanent Magnet Materials
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Peter Robison & Gopal Ratnam (29 September 2010).
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demonstrating a NdFeB magnet's force with 2 kg bottle.
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How to Understand the Grade of Sintered NdFeB Magnet?
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Rare Earths: Science, Technology, Production and Use
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B crystal structure has exceptionally high uniaxial
1680: 347:– magnetic field strength H in units of A/m versus 2754:Concern as China clamps down on rare earth exports 2707:2023 Honda Prize Honors Neodymium Magnet Inventors 2612:Permanent-Magnet Materials and their Applications 1888:As hybrid cars gobble rare metals, shortage looms 1321:in various objects (cutlery, coins, jewelry etc.) 500:Magnetic properties of various permanent magnets 484:and energy product, neodymium magnets have lower 188:B magnets, while Sumitomo developed full-density 4008: 2627:Permanent Magnet Materials and their Application 1985: 1291:require one kilogram (2.2 lb) of neodymium. 1174:Most hard disk drives incorporate strong magnets 1007:Neodymium magnets are graded according to their 2521:"How to remove a finger with two super magnets" 2270:. United Parachute Technologies. Archived from 1186:uses a neodymium magnet to generate electricity 1157: 2045:. Everbeen Magnet. Retrieved December 6, 2015. 1911: 1893: 1074:Rapid solidification or bonded magnet process 3237: 2779: 2614:, Trans Tech Publications Ltd., Switzerland, 2284: 1902:, Permanent Magnets Comparison and Selection. 1308:(only those with permanent magnet excitation) 223:B powder to bonded magnet manufacturers. The 27:-plated neodymium magnet on a bracket from a 1715:, December 2011. Accessed: 23 December 2011. 2673:Journal of Magnetism and Magnetic Materials 2670: 2629:. Cambridge University Press. p. 217. 2134:Corporation. 24 August 2015. Archived from 803:Temperature coefficient of coercivity (%/K) 3244: 3230: 2786: 2772: 2150: 1857: 979: 792:Temperature coefficient of remanence (%/K) 2469:Pearson (2009). "Chapter 12: Magnetism". 1812: 1802: 1439:, because some neodymium magnets contain 2624: 2473:. Pearson Education India. p. 505. 1914:"Corrosion of Nd-Fe-B permanent magnets" 1776: 1699: 1697: 1695: 1476: 1474: 1329: 1177: 1169: 1161: 943: 711: 277: 269: 251:Advanced Research Projects Agency-Energy 69: 41: 33: 18: 2793: 2651: 2468: 2442: 2412: 2406: 2180: 1639: 1544: 1542: 1540: 1538: 1536: 1534: 364:, or resistance to being demagnetized. 4009: 3285: 1995:. Amazing Magnets, LLC. Archived from 1883: 1881: 1851: 1480: 856:, perpendicular to magnetization (1/K) 289: 3738: 3225: 2767: 2749:Geeky Rare-Earth Magnets Repel Sharks 2518: 2215: 2120: 1858:Boysen, Earl; Muir, Nancy C. (2011). 1692: 1471: 2188:"The Permanent Magnet Market – 2015" 2036: 1864:. John Wiley and Sons. p. 167. 1783:Energy Research & Social Science 1531: 367:The neodymium atom can have a large 215:). The company supplied melt-spun Nd 203:GM commercialized its inventions of 38:Nickel-plated neodymium magnet cubes 2391:. Torax Medical Inc. 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Archived from 1689:, What are Bonded NdFeB Magnets? 1427:, and magnetize watches and the 1190:Neodymium magnets have replaced 48:transmission electron microscopy 2563: 2538: 2519:Swain, Frank (March 29, 2018). 2512: 2487: 2462: 2443:Marchio, Cathy (Apr 16, 2024). 2436: 2427: 2381: 2363: 2338: 2324: 2299: 2278: 2260: 2246: 2228: 2209: 2109: 2084: 2066: 2048: 2011: 1938: 1905: 1829: 1770: 1744: 1718: 1363:gastroesophageal reflux disease 1152: 1061:Classical powder metallurgy or 1777:Overland, Indra (2019-03-01). 1604: 1569: 1555:. Elsevier. pp. 224–225. 1501: 1287:. The electric motors of each 439:samarium cobalt (SmCo) magnets 1: 2693:10.1016/S0304-8853(02)00334-7 2092:"Bonded Magnets – Production" 1647:"What are neodymium magnets?" 1487:. USA: Springer. p. 73. 1465: 1052: 854:Thermal expansion coefficient 840:Thermal expansion coefficient 331:magnetocrystalline anisotropy 265: 2351:Questions and Answers in MRI 1365:(GERD). They have also been 1311:Retail media case decouplers 1199:Head actuators for computer 1158:Existing magnet applications 960:B tends to be vulnerable to 939: 227:facility became part of the 7: 2759:What Are Neodymium Magnets? 2652:Furlani, Edward P. (2001). 1890:, Reuters, August 31, 2009. 1708:Critical Materials Strategy 1446: 1367:implanted in the fingertips 1184:manually-powered flashlight 10: 4078: 3740: 2656:. London: Academic Press. 1947:Journal of Applied Physics 1804:10.1016/j.erss.2018.10.018 1613:Journal of Applied Physics 1578:Journal of Applied Physics 1509:"What is a Strong Magnet?" 1399: 1359:lower esophageal sphincter 1352:magnetic resonance imaging 1236:Benchtop NMR spectrometers 476:Although they have higher 159: 3287: 3265: 3200: 2866: 2801: 2471:IIT Foundations - Physics 2195:Magnetics 2013 Conference 2019:"Neodymium Magnet Grades" 1513:The Magnetic Matters Blog 1002: 541: 531: 519: 507: 504: 2742:University of Nottingham 2625:Campbell, Peter (1994). 1754:. ARPA-E. Archived from 386:saturation magnetization 153:and magnetic fasteners. 4017:Ferromagnetic materials 1653:. Conjecture Corp. 2011 1011:, which relates to the 980:Temperature sensitivity 471:samarium–cobalt magnets 143:Sumitomo Special Metals 4022:Loudspeaker technology 2610:K.H.J. Buschow (1998) 2527:. Seed Media Group LLC 1944: 1675:Sintered NdFeB Magnets 1610: 1575: 1481:Fraden, Jacob (2010). 1335: 1187: 1175: 1167: 1009:maximum energy product 949: 721: 369:magnetic dipole moment 286: 275: 79: 67: 46:Left: high-resolution 39: 31: 2056:"Grades of Neodymium" 1927:(1–2). Archived from 1837:"Magnetic Anisotropy" 1341:neodymium magnet toys 1333: 1181: 1173: 1165: 947: 715: 281: 273: 73: 45: 37: 22: 2525:The Sciencepunk Blog 2168:on 28 September 2015 1993:"Magnet Grade Chart" 1687:Bonded NdFeB Magnets 1394:manufacturing plants 1369:in order to provide 1120:glass-filled polymer 1101:into bonded magnets. 972:of a surface layer. 882:Compressive strength 686:Sr-ferrite, sintered 141:and in the 1970s by 4062:Japanese inventions 4052:Neodymium compounds 4032:Magnetic levitation 2795:Neodymium compounds 2730:"More with Magnets" 2685:2002JMMM..248..432B 2635:1996pmma.book.....C 2347:"MRI magnet design" 2238:. 9 November 2014. 1959:1988JAP....63.3522G 1795:2019ERSS...49...36O 1625:1984JAP....55.2078C 1590:1984JAP....55.2083S 1302:Electric generators 964:, especially along 780:Recoil permeability 730: 501: 290:Magnetic properties 229:Hitachi Corporation 149:in cordless tools, 2197:. February 7, 2013 1758:on 10 October 2013 1371:sensory perception 1336: 1263:Synchronous motors 1188: 1176: 1168: 1137:As of 2012, 50,000 1124:injection moulding 950: 724: 722: 642:Sm(Co, Fe, Cu, Zr) 499: 384:B compound a high 373:unpaired electrons 312:Curie temperatures 287: 276: 180:nanocrystalline Nd 80: 68: 40: 32: 4037:Rare earth alloys 4004: 4003: 3998: 3997: 3219: 3218: 2663:978-0-12-269951-1 2644:978-0-521-24996-6 2620:978-0-87849-796-6 2583:on 8 January 2013 2345:Elster, Allen D. 2274:on July 17, 2011. 2138:on 9 October 2015 2116:Bonded neo powder 2096:Allstar Magnetics 1999:on March 13, 2016 1871:978-1-118-13688-1 1562:978-0-444-62744-5 1519:on March 26, 2016 1494:978-1-4419-6465-6 1459:Rare-earth magnet 1285:electric vehicles 1279:Drive motors for 1230:Magnetic bearings 1018:Curie temperature 937: 936: 868:Flexural strength 815:Curie temperature 705: 704: 486:Curie temperature 467:rare-earth magnet 371:because it has 4 300:transition metals 296:antiferromagnetic 132:rare-earth magnet 60:crystal structure 4069: 4042:Types of magnets 3269: 3268: 3246: 3239: 3232: 3223: 3222: 2788: 2781: 2774: 2765: 2764: 2745: 2696: 2667: 2648: 2593: 2592: 2590: 2588: 2582: 2575: 2567: 2561: 2560: 2558: 2557: 2542: 2536: 2535: 2533: 2532: 2516: 2510: 2509: 2507: 2505: 2495:"Magnetic Crane" 2491: 2485: 2484: 2466: 2460: 2459: 2457: 2455: 2449:Stanford Magnets 2440: 2434: 2431: 2425: 2424: 2422: 2421: 2410: 2404: 2403: 2401: 2400: 2385: 2379: 2378: 2373:. 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Archived from 2052: 2046: 2040: 2034: 2033: 2031: 2029: 2015: 2009: 2008: 2006: 2004: 1989: 1983: 1977: 1971: 1970: 1967:10.1063/1.340729 1953:(8): 3522–3524. 1942: 1936: 1935: 1933: 1918: 1909: 1903: 1897: 1891: 1885: 1876: 1875: 1855: 1849: 1848: 1846: 1844: 1833: 1827: 1826: 1816: 1806: 1774: 1768: 1767: 1765: 1763: 1748: 1742: 1741: 1739: 1737: 1722: 1716: 1701: 1690: 1684: 1678: 1672: 1663: 1662: 1660: 1658: 1651:wiseGEEK website 1643: 1637: 1636: 1633:10.1063/1.333571 1608: 1602: 1601: 1598:10.1063/1.333572 1573: 1567: 1566: 1546: 1529: 1528: 1526: 1524: 1505: 1499: 1498: 1478: 1326:New applications 1147: 1140: 1099:injection-molded 966:grain boundaries 910:Vickers hardness 896:Tensile strength 731: 723: 718:magnetic domains 666:Alnico, sintered 502: 498: 480:and much higher 430: 426: 405: 398: 357:microcrystalline 343: 260:renewable energy 151:hard disk drives 100:permanent magnet 84:neodymium magnet 4077: 4076: 4072: 4071: 4070: 4068: 4067: 4066: 4027:Magnetic alloys 4007: 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2543: 2539: 2530: 2528: 2517: 2513: 2503: 2501: 2493: 2492: 2488: 2481: 2467: 2463: 2453: 2451: 2441: 2437: 2432: 2428: 2419: 2417: 2411: 2407: 2398: 2396: 2387: 2386: 2382: 2369: 2368: 2364: 2355: 2353: 2343: 2339: 2330: 2329: 2325: 2316: 2314: 2305: 2304: 2300: 2283: 2279: 2268:"Options Guide" 2266: 2265: 2261: 2252: 2251: 2247: 2234: 2233: 2229: 2214: 2210: 2200: 2198: 2190: 2186: 2185: 2181: 2171: 2169: 2156: 2155: 2151: 2141: 2139: 2126: 2125: 2121: 2114: 2110: 2100: 2098: 2090: 2089: 2085: 2072: 2071: 2067: 2054: 2053: 2049: 2041: 2037: 2027: 2025: 2017: 2016: 2012: 2002: 2000: 1991: 1990: 1986: 1978: 1974: 1943: 1939: 1931: 1916: 1910: 1906: 1898: 1894: 1886: 1879: 1872: 1856: 1852: 1842: 1840: 1835: 1834: 1830: 1775: 1771: 1761: 1759: 1750: 1749: 1745: 1735: 1733: 1723: 1719: 1702: 1693: 1685: 1681: 1673: 1666: 1656: 1654: 1645: 1644: 1640: 1609: 1605: 1574: 1570: 1563: 1547: 1532: 1522: 1520: 1507: 1506: 1502: 1495: 1479: 1472: 1468: 1449: 1414:digestive tract 1402: 1328: 1319:precious metals 1241:Electric motors 1212:Locks for doors 1209:firing switches 1160: 1155: 1145: 1138: 1112:splat quenching 1088: 1084: 1065:magnet process 1055: 1005: 990: 982: 959: 955: 942: 710: 645: 621: 597: 593: 569: 565: 548: 538: 537: 528: 526: 516: 514: 451: 447: 428: 424: 422: 415: 403: 396: 394: 383: 379: 349:magnetic moment 341: 339: 328: 324: 292: 268: 238: 234: 222: 218: 199: 195: 187: 183: 171: 167: 162: 147:electric motors 125: 121: 86:(also known as 57: 53: 29:hard disk drive 17: 12: 11: 5: 4075: 4065: 4064: 4059: 4057:Ferrous alloys 4054: 4049: 4044: 4039: 4034: 4029: 4024: 4019: 4002: 4001: 3996: 3995: 3992: 3989: 3986: 3983: 3980: 3977: 3974: 3971: 3967: 3963: 3960: 3956: 3952: 3949: 3946: 3943: 3939: 3938: 3934: 3927: 3923: 3919: 3912: 3908: 3904: 3897: 3893: 3889: 3882: 3878: 3874: 3867: 3863: 3859: 3852: 3848: 3844: 3837: 3833: 3829: 3825: 3821: 3814: 3810: 3807: 3803: 3796: 3792: 3788: 3781: 3777: 3773: 3766: 3762: 3758: 3751: 3747: 3743: 3742: 3739: 3736: 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1934:on 2012-04-02. 1904: 1892: 1877: 1870: 1850: 1828: 1769: 1743: 1731:Bloomberg News 1717: 1691: 1679: 1664: 1638: 1603: 1568: 1561: 1530: 1500: 1493: 1469: 1467: 1464: 1463: 1462: 1456: 1453:Magnet fishing 1448: 1445: 1405:broken bones. 1401: 1398: 1382:magnetic force 1327: 1324: 1323: 1322: 1315: 1312: 1309: 1298: 1297: 1296: 1295: 1292: 1277: 1275:power steering 1271: 1269:stepper motors 1265: 1260: 1253: 1248: 1246:Cordless tools 1238: 1233: 1227: 1222: 1213: 1210: 1203: 1159: 1156: 1154: 1151: 1105: 1104: 1103: 1102: 1086: 1082: 1072: 1071: 1070: 1054: 1051: 1050: 1049: 1046: 1043: 1040: 1037: 1034: 1031: 1028: 1004: 1001: 988: 981: 978: 957: 953: 941: 938: 935: 934: 931: 928: 920: 919: 916: 913: 906: 905: 902: 899: 892: 891: 888: 885: 878: 877: 874: 871: 864: 863: 860: 857: 850: 849: 846: 843: 836: 835: 832: 829: 828:Density (g/cm) 825: 824: 821: 818: 811: 810: 807: 804: 800: 799: 796: 793: 789: 788: 785: 782: 776: 775: 772: 769: 762: 761: 758: 755: 744: 743: 738: 735: 709: 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2273: 2269: 2263: 2255: 2249: 2241: 2237: 2231: 2223: 2219: 2212: 2196: 2189: 2183: 2167: 2163: 2162:Asahi Shimbun 2159: 2153: 2137: 2133: 2129: 2123: 2117: 2112: 2097: 2093: 2087: 2079: 2075: 2069: 2061: 2057: 2051: 2044: 2039: 2024: 2020: 2014: 1998: 1994: 1988: 1981: 1976: 1968: 1964: 1960: 1956: 1952: 1948: 1941: 1930: 1926: 1922: 1915: 1908: 1901: 1896: 1889: 1884: 1882: 1873: 1867: 1863: 1862: 1854: 1838: 1832: 1824: 1820: 1815: 1814:11250/2579292 1810: 1805: 1800: 1796: 1792: 1788: 1784: 1780: 1773: 1757: 1753: 1747: 1732: 1728: 1721: 1714: 1713: 1709: 1705: 1700: 1698: 1696: 1688: 1683: 1676: 1671: 1669: 1652: 1648: 1642: 1634: 1630: 1626: 1622: 1618: 1614: 1607: 1599: 1595: 1591: 1587: 1583: 1579: 1572: 1564: 1558: 1554: 1553: 1545: 1543: 1541: 1539: 1537: 1535: 1518: 1514: 1510: 1504: 1496: 1490: 1486: 1485: 1477: 1475: 1470: 1460: 1457: 1454: 1451: 1450: 1444: 1442: 1438: 1434: 1430: 1426: 1422: 1417: 1415: 1411: 1406: 1397: 1395: 1391: 1387: 1383: 1378: 1376: 1372: 1368: 1364: 1360: 1355: 1353: 1348: 1346: 1342: 1332: 1320: 1316: 1313: 1310: 1307: 1306:wind turbines 1303: 1300: 1299: 1293: 1290: 1286: 1282: 1278: 1276: 1272: 1270: 1266: 1264: 1261: 1258: 1254: 1252: 1249: 1247: 1244: 1243: 1242: 1239: 1237: 1234: 1232:and couplings 1231: 1228: 1226: 1225:Mobile phones 1223: 1221: 1217: 1214: 1211: 1208: 1204: 1202: 1198: 1197: 1196: 1193: 1185: 1180: 1172: 1164: 1150: 1143: 1135: 1132: 1127: 1125: 1121: 1117: 1113: 1109: 1100: 1096: 1093:, and either 1092: 1080: 1079:melt spinning 1076: 1075: 1073: 1067: 1066: 1064: 1060: 1059: 1058: 1047: 1045:N28TH – N35TH 1044: 1042:N28EH – N40EH 1041: 1039:N28UH – N42UH 1038: 1036:N30SH – N48SH 1035: 1032: 1029: 1026: 1025: 1024: 1021: 1019: 1014: 1013:magnetic flux 1010: 1000: 998: 994: 987: 977: 973: 971: 967: 963: 946: 932: 929: 926: 922: 921: 917: 914: 911: 908: 907: 903: 900: 897: 894: 893: 889: 886: 883: 880: 879: 875: 872: 869: 866: 865: 861: 858: 855: 852: 851: 847: 844: 841: 838: 837: 833: 830: 827: 826: 822: 819: 816: 813: 812: 809:−(0.30–0.15) 808: 805: 802: 801: 798:−(0.05–0.03) 797: 794: 791: 790: 786: 783: 781: 778: 777: 773: 770: 767: 764: 763: 759: 756: 753: 749: 746: 745: 742: 739: 736: 733: 732: 728: 719: 714: 700: 697: 694: 691: 688: 685: 684: 680: 677: 674: 671: 668: 665: 664: 660: 657: 654: 651: 648: 641: 640: 636: 633: 630: 627: 624: 617: 616: 612: 609: 606: 603: 600: 589: 588: 584: 581: 578: 575: 572: 561: 560: 556: 553: 552: 549: 545: 534: 527: 523: 515: 511: 503: 497: 495: 491: 487: 483: 479: 474: 472: 468: 464: 460: 455: 442: 440: 435: 433: 419: 412: 408: 401: 391: 387: 374: 370: 365: 363: 358: 354: 350: 346: 336: 332: 320: 315: 313: 309: 308:ferromagnetic 305: 301: 297: 284: 280: 272: 263: 261: 257: 256:wind turbines 252: 248: 243: 240: 230: 226: 214: 210: 206: 201: 191: 179: 175: 157: 154: 152: 148: 144: 140: 135: 133: 129: 117: 113: 109: 105: 102:made from an 101: 98:magnet) is a 97: 93: 89: 85: 77: 76:Masato Sagawa 72: 65: 61: 49: 44: 36: 30: 26: 21: 3257: 2733: 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Retrieved 1517:the original 1512: 1503: 1483: 1429:shadow masks 1425:credit cards 1421:floppy disks 1418: 1410:eye injuries 1407: 1403: 1379: 1356: 1349: 1337: 1317:Identifying 1289:Toyota Prius 1267:Spindle and 1255:Lifting and 1216:Loudspeakers 1189: 1166:Ring magnets 1153:Applications 1136: 1128: 1107: 1106: 1056: 1022: 1006: 985: 983: 974: 951: 930:(110–170)×10 806:−(0.65–0.40) 795:−(0.12–0.09) 543: 532: 521: 509: 475: 443: 436: 417: 410: 389: 366: 353:crystal axis 334: 316: 293: 244: 241: 207:Neo powder, 202: 163: 155: 136: 95: 91: 87: 83: 81: 2738:Brady Haran 2587:13 December 2132:Nitto Denko 2003:December 4, 1704:Chu, Steven 1657:October 12, 1619:(6): 2078. 1584:(6): 2083. 1523:October 12, 1441:ferrocerium 1273:Electrical 1251:Servomotors 1207:e-cigarette 1205:Mechanical 1131:Nitto Denko 1095:compression 1069:magnetized. 1033:N30H – N50H 1030:N30M – N50M 952:Sintered Nd 933:(50–90)×10 925:resistivity 923:Electrical 862:(10–13)×10 774:0.493–2.79 570:B, sintered 454:diamagnetic 423: ≈ 512 200:B magnets. 50:image of Nd 4011:Categories 2556:2021-05-27 2531:2009-06-28 2420:2016-09-30 2399:2014-05-18 2356:2018-12-26 2317:2018-08-22 2101:26 October 1466:References 1390:warehouses 1257:compressor 1220:headphones 1201:hard disks 1116:coercivity 1108:Bonded neo 1053:Production 993:Dysprosium 771:0.875–2.79 766:Coercivity 681:1292–1580 646:, sintered 622:, sintered 494:dysprosium 482:coercivity 427:kJ/m or 64 362:coercivity 319:tetragonal 283:Ferrofluid 266:Properties 209:bonded neo 128:tetragonal 58:B; right: 2292:USA Today 1823:2214-6296 1789:: 36–40. 1386:shipyards 1361:to treat 1294:Actuators 1129:In 2015, 1027:N27 – N55 962:corrosion 940:Corrosion 890:800–1000 887:1000–1100 848:(5–9)×10 787:1.05–1.1 760:0.8–1.16 748:Remanence 737:Neodymium 598:B, bonded 478:remanence 205:isotropic 178:melt-spun 108:neodymium 74:Inventor 64:unit cell 2910:Nd(acac) 2740:for the 2504:June 28, 2454:June 28, 2240:Archived 1762:23 April 1736:24 March 1447:See also 1375:grinders 1063:sintered 1048:N33VH/AH 995:(Dy) or 970:spalling 918:400–650 876:150–180 859:(1–3)×10 845:(3–4)×10 834:8.2–8.5 823:700–850 734:Property 729:magnets 689:0.2–0.78 652:450–1300 649:0.9–1.15 628:600–2000 613:590–752 604:600–1200 585:590–752 576:750–2000 469:family, 459:samarium 302:such as 225:Sumitomo 213:Molycorp 190:sintered 4047:Borides 3741:  3253:Borides 2867:Nd(III) 2713:, Vol. 2681:Bibcode 2631:Bibcode 2311:CTVNews 1955:Bibcode 1843:2 March 1791:Bibcode 1621:Bibcode 1586:Bibcode 1400:Hazards 1091:polymer 997:terbium 915:500–650 873:200–400 831:7.3–7.7 820:310–370 692:100–300 678:700–860 669:0.6–1.4 655:150–240 631:120–200 625:0.8–1.1 610:310–400 601:0.6–0.7 582:310–400 579:200–440 573:1.0–1.4 539:(kJ/m) 529:(kA/m) 505:Magnet 490:terbium 310:, with 160:History 3201:Nd(IV) 3096:Nd(ReO 3015:Nd(OH) 2987:Nd(ClO 2802:Nd(II) 2660:  2641:  2618:  2477:  2028:10 May 1868:  1821:  1559:  1491:  1392:, and 1281:hybrid 1259:motors 1192:alnico 1146:  1139:  1003:Grades 927:(Ω·cm) 904:35–40 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Index


Nickel
hard disk drive


transmission electron microscopy
crystal structure
unit cell

Masato Sagawa
permanent magnet
alloy
neodymium
iron
boron
tetragonal
rare-earth magnet
General Motors
Sumitomo Special Metals
electric motors
hard disk drives
samarium-cobalt permanent magnets
melt-spun
sintered
isotropic
bonded neo
Molycorp
Sumitomo
Hitachi Corporation
United States Department of Energy

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