Friday, January 3, 2014

Types and application of rare earth magnets

With the updated science and technology, the choice of materials has become the object of scientists focused discussion. And the development of new materials, rare earth magnet greatly improved their level of application of rare earth magnets of high-tech industries, and its application technology in high-tech fields. The new materials include rare earth magnets rare earth magnet permanent magnet materials, rare earth magnets luminescent materials, hydrogen storage materials of rare earth magnets , rare earth magnets catalyst materials, rare earth magnets and other rare earth magnets ceramic materials and new materials such as rare earth magnets giant magnetostrictive material , giant magnetoresistance materials, magnetic refrigeration materials, optical refrigeration materials , magneto-optical storage materials.

Rare-earth magnet alloy composition because of different magnetic materials , the current can be divided into three categories: ( 1 ) rare earth magnets - cobalt permanent magnet materials : SmCo5, Sm2Co17; (2) rare earth magnets - iron permanent magnet materials : Nd2Fe14B; (3) Rare magnet iron nitrogen (RE-Fe-N system ) or rare earth magnet iron-carbon (RE-Fe-C system ) permanent magnet materials .

The highest performance magnets are rare earth magnets , rare earth magnets and Nd-Fe is the most powerful magnet. However, in the above 200 ° C environment , is the most powerful samarium cobalt magnet .

Types of magnets
Magnet , the magnet should be called , in English Magnet, magnet now mainly divided into two categories, one is soft , one is hard magnetic ; soft includes silicon steel and soft iron core ; hard magnetic include alnico , SmCo , ferrite and NdFeB , which, samarium cobalt magnet is the most expensive , the most expensive is the ferrite magnets , NdFeB magnets are the highest performance , but the performance of the most stable , best temperature coefficient Alnico magnet is , the user can select a different hard magnetic products according to different needs.

Application magnets

Currently NdFeB permanent magnet applications we have developed have been widely used in energy, transportation, machinery, medical , computers, household appliances and other fields. Another important application of rare earth neodymium magnets luminescent materials are rare earth magnets tricolor energy-saving lamps, high-end consumer market trends of magnets , rare earth magnets trichromatic phosphor It uses photoluminescent materials, rare earth magnet high luminous efficiency energy saving lamps , saving electricity , its application has been developed around the world attention.

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