The nature and application of NdFeB magnets magnet
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2014 年 1 月 14 日 星期二
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The nat ure and applicat ion of NdFeB magnet s magnet
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NdFeB magnets can be divided into two kinds of sintered NdFeB and bonded NdFeB . Injection molding is actually bonded ,
sintered is heated by high temperature vacuum forming ! NdFeB magnets - still excellent magnetic : Material grades have N35N52; various shapes according to specific requirements of processing: , round , square , punching, magnetic tile , magnetic ,
convex , trapezoidal ; Despite these advantages , However, surface rust , so usually require some protective surface
treatment: nickel, zinc , gold-plated, epoxy · NdFeB magnets applicable environmental temperature is below 200 degrees.
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• The nature and appli...
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NdFeB is the third generation rare earth permanent magnet materials, known as the " King of the permanent magnet ,"
appeared in the 1980s , it is a high intensity magnetic and relatively low cost of the permanent magnet materials have been
unprecedented reused in various fields. It is a tetragonal crystal structure is composed of two symmetrical fourteen neodymium
iron atoms and the atoms of boron atoms a . It nature's most abundant and most spontaneous magnetic iron and iron can make
a fixed combination of magnetic rare earth neodymium in the same direction. This combination not only like a strong magnetic
NdFeB magnets can pick up to 1000 times its own weight of iron , and cheap .
Using rare earth permanent magnet electrical instrumentation and electronic components can be further reduced product size ,
performance greatly improved , adapted electronics light, thin , small demand trends , but also makes efficient permanent
magnet transportation vehicles and parts and electronic products , small and lightweight as possible.
For example, instead of using NdFeB permanent magnet speaker conventional ferrite or alnico magnets , can make the
speaker weight under the circumstances to reduce the spread of power does not become 2-3 times , but also greatly improve
the sensitivity of the speaker .
The rare earth NdFeB material can be applied to significantly reduce the weight of the motor on the development of various
motor , the motor can be reduced dimensions , they can obtain efficient energy-saving effect and improve the performance of
the motor, power electronics combined with the new technology , mechatronics product can be achieved on the application and
development of themotor permanent magnet plays a major role. Recent specialty television Shenyang University Institute
developed 1,120 kilowatts permanent magnet motor is the current world 's largest rare earth NdFeB permanent magnet motor ,
its mechanical power up to 97.5% , than it can replace a large common power level 1-2 motors.
Now NdFeB rare earth materials are penetrating into all areas of the national economy, small stereos, cell phones , DVD
players , large automobiles, electrical equipment, magnetic levitation trains , NdFeB permanent magnet materials are showing
great prospect .
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