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The following is a list of the world's largest manufacturing companies, ordered by revenue in millions of U.S. dollars according to the Fortune Global 500. Currently the 50 biggest companies by revenue are included.
Agricultural machinery manufacturers of the United States (4 C, 36 P) Aircraft manufacturers of the United States (17 C, 144 P, 1 F) Audio equipment manufacturers of the United States (13 C, 220 P)
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 samarium cobalt (SmCo) magnets, which were the first type of rare-earth magnet to be commercialized. In practice, the magnetic properties of neodymium magnets depend ...
On January 18, 1960, Rea Magnet Wire was purchased by Alcoa. Sales manager Robert L. “Bob” Whearley—another Dudlo employee—was named President in late 1960 when brothers Samuel and David Rea left the company. Jim Vann, who had been president of Rea since 1982, joined with several others to buy Rea Magnet Wire from Alcoa.
Alnico's anisotropy is oriented along the desired magnetic axis by applying an external magnetic field to it during the precipitate particle nucleation, which occurs when cooling from 900 °C (1,650 °F) to 800 °C (1,470 °F), near the Curie point. There are local anisotropies of different orientations without an external field due to ...
Ferrofluid on glass, with a rare-earth magnet underneath. A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements.Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.
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