Permanent magnet for electromagnetic device and method of making
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United States of America Patent
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Jul 22, 2003
Grant Date -
Apr 17, 2003
app pub date -
Aug 14, 2001
filing date -
Aug 14, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Permanent magnets, devices including permanent magnets and methods for manufacture are described with the permanent magnet comprising, for example: iron-boron-rare earth alloy particulate having an intrinsic coercive force of at least about 1591 kiloamperes/meter (about 20 kiloOersteds) and a residual magnetization of at least about 0.8 tesla (about 8 kiloGauss), wherein the rare earth content comprises praseodymium, a light rare earth element selected from the group consisting of cerium, lanthanum, yttrium and mixtures thereof, and balance neodymium; and a binder bonding the particulate.
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