A neodymium magnet
(also known as NdFeB, NIB or Neo magnet), the most widely used type of
rare-earth magnet, is a permanent magnet made from an alloy of
neodymium, iron and boron to form the Nd2Fe14B tetragonal crystalline
structure. Developed in 1982 by General Motors and Sumitomo Special
Metals, neodymium magnets are the strongest type of permanent magnet
made. They have replaced other types of magnet in the many applications
in modern products that require strong permanent magnets, such as motors
in cordless tools, hard disk drives and magnetic fasteners.
Neodymium magnets are a type of rare earth magnet. They are the strongest rare earth magnets and can be very dangerous if handled improperly. They are often referred to as rare earth magnets because they belong to the rare earth elements on the periodic table. But they are not the same as rare earth magnets. There are different types of rare earth magnets and Neodymium magnets are just one type. Neodymium magnets are the strongest permanent magnets available today.
Neodymium magnets are also known as Neodymium-Iron-Boron or Nd-Fe-B or NIB super magnets since they are composed of these elements. These magnets are extremely strong for their small size and are metallic in appearance.
Neodymium magnets are part of the rare earth magnet family and are also called NdFeB magnets (NIB) because of their composition: Nd = Neodymium, Fe = Iron, and B = Boron.
Neodymium magnets can be found in head actuators for computer hard disks. They can also be found in magnetic bearings and couplings. Electric motors contain neodymium magnets also.
Neodymium magnets are produced by two different methods, the classical powder metallurgy or sintered magnet process and the rapid solidification or bonded magnet process. Sintered neodymium magnets are prepared by pulverizing.
The strength of neodymium magnets is noted as the letter “N” followed by a number, with a range from N24 to N55. In theory, it is possible to make one that is as strong as N64, but this remains a mostly theoretical possibility. These magnets have some odd properties when they interact with certain other materials because of their impressive strength-to-size ratio.
Most of the neodymium magnets in use are small, and even these can be dangerous if improperly handled. For example, if a child is left unattended and swallows two small magnets, they can pinch together internal organs and cause fatal injuries or infections. Even more care must be taken with larger magnets, such as those that are as large as the palm of a person’s hand. These magnets are strong enough to affect everything magnetic or electronic in a room, often with unpleasant results.
Edit by RUISEN MAGNETICS CO.LTD
http://www.senmagnetics.com/blog/?p=24
Neodymium magnets are a type of rare earth magnet. They are the strongest rare earth magnets and can be very dangerous if handled improperly. They are often referred to as rare earth magnets because they belong to the rare earth elements on the periodic table. But they are not the same as rare earth magnets. There are different types of rare earth magnets and Neodymium magnets are just one type. Neodymium magnets are the strongest permanent magnets available today.
Neodymium magnets are also known as Neodymium-Iron-Boron or Nd-Fe-B or NIB super magnets since they are composed of these elements. These magnets are extremely strong for their small size and are metallic in appearance.
Neodymium magnets are part of the rare earth magnet family and are also called NdFeB magnets (NIB) because of their composition: Nd = Neodymium, Fe = Iron, and B = Boron.
Neodymium magnets can be found in head actuators for computer hard disks. They can also be found in magnetic bearings and couplings. Electric motors contain neodymium magnets also.
Neodymium magnets are produced by two different methods, the classical powder metallurgy or sintered magnet process and the rapid solidification or bonded magnet process. Sintered neodymium magnets are prepared by pulverizing.
The strength of neodymium magnets is noted as the letter “N” followed by a number, with a range from N24 to N55. In theory, it is possible to make one that is as strong as N64, but this remains a mostly theoretical possibility. These magnets have some odd properties when they interact with certain other materials because of their impressive strength-to-size ratio.
Most of the neodymium magnets in use are small, and even these can be dangerous if improperly handled. For example, if a child is left unattended and swallows two small magnets, they can pinch together internal organs and cause fatal injuries or infections. Even more care must be taken with larger magnets, such as those that are as large as the palm of a person’s hand. These magnets are strong enough to affect everything magnetic or electronic in a room, often with unpleasant results.
Edit by RUISEN MAGNETICS CO.LTD
http://www.senmagnetics.com/blog/?p=24
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