To Know Neodymium magnet

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

The uses of industrial magnets

Magnets used in industrial settings must be more durable and emit more magnetism than the everyday ones you use on your fridge. Compared to the soft and pliable rubberized magnets most people use in their homes, industrial magnets are made from much stronger materials, such as ceramic or magnetite. Coupled with the strength of the materials industrial magnets are composed of, their magnetic force also makes it extremely hard for industrial magnets to be cut. Do not waste your time trying to cut one of these magnets with a regular saw; this will only dull the blade. Instead, use a diamond-plated blade and a dremel to cut an industrial magnet.
Industrial magnets come in a wide range of types, shapes, sizes and strengths. They are utilized across a diverse spectrum of industries for an equally diverse set of purposes. Particular uses of industrial magnets depend upon particular requirements.

The Magnetic Materials Producers Association (MMPA) and the Magnetic Distributors and Fabrications Associations (MDFA) set the industry standards for magnet production and testing. It is helpful to refer to their publications when selecting magnets for a particular industry. Some commonly used industrial magnets include permanent magnets, electromagnets, ferrite, samarium, rubber magnets, sheet magnets and neodymium.

The industries that regularly use industrial magnets in their operations are the automobile, electronics, plastics, glass and ceramics, shipping, construction, mining, food and pharmaceutical industries. They use magnets to facilitate production and for generating energy. Magnets are also used in implementing industry safeguards.

Magnets may be used in conveyors, plates, assemblies, separators, magnetized pulleys, tube grates, chutes and cranes. Magnets are required to separate ferrous impurities from non-ferrous matter. They separate metals from ore in the mining industry.

In the food and pharmaceutical industry, magnets pick out any iron particles that might have inadvertently mixed with the food or medications. Magnetic sweepers in airports, docks and construction sites pick up any waste iron scrap that would otherwise endanger traffic or puncture tires. By detecting the scrap before any harm is done, they prevent the expense of repairs.

Industrial magnets lift, hold, convey, stack and drop heavy loads. This is very useful in construction, shipping, manufacturing and mining. Magnets are also used in salvage operations and can help dredge large items from the ocean floor.

Magnets, in permanent and electromagnet combination, are used in electric motors for converting electric energy into mechanical energy. The same combination is used in generators to convert mechanical energy into the electrical.

Electronic goods like televisions, radios, CRT computer monitors, CD drives, loudspeakers, microphones, clocks, and sensors have magnets in them. Magnets are used in amplifiers, electric guitar pickups, transformers, actuators, compasses and toys.

Magnets are used in Maglev trains. The full form of Maglev is magnetically levitated. The magnets in the underside of the train and in the rail tracks repel one another. Due to this repulsion, these trains actually float or levitate above the train tracks. This lessens friction and increases train speed. Maglev trains, which were first introduced in Japan in 1997, can travel at speeds up to 480 km/hr.