Emphatically reviewed four systems of permanent magnet material: Al-Ni-Co magnet, ferrite magnet, rare-earth magnet and glue magnet.

着重评介了铝镍钴系永磁材料、铁氧体永磁材料、稀土永磁材料和粘结永磁材料四大系列。

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The invention has the advantages that the nano permanent magnet material in the true sense is obtained, and the preparation method is simple.

本发明的优点在于：实现了真正意义上的纳 米尺寸永磁材料，制备方法简单。

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The superiority and inferiority of PM machine is closely related with the function parameter of permanent magnet material which is being used.

永磁电机性能的好坏，直接与所采用的永磁材料的性能参数有着密切的关系。

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That is because a permanent magnet's maximum strength is dictated by the material it is made from, while an electromagnet's strength depends on the current passing through it.

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Of course, a device of that size also poses a number of problems, but Insound appears to have all those sorted out, with it employing a special "spongy material" that allows moisture to escape and prevent infection, and a magnet to actually remove the device from the ear.

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It's an incredibly sleek and solidly built device that won't leave us worried about durability, since it consists of aluminum on the sides and a soft-touch polycarbonate on the back that is quite similar to the material used on the 8X. (Unfortunately, it's also a fingerprint magnet.) Gorilla Glass 2 graces the display with the promise of preventing that beautiful screen from getting scuffed.

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