The preparation method of magnesy neodymowe

 　　The first is vaccum quenched method (melt spun), it means injecting the melting magnesy neodymowe alloy liquid to the surface of water-cooled metal roller which is in high speed rotating, making the molten alloy set and jilt into thin belt with an extremely fast cooling speed. The thickness of this kind of thin tape is commonly 30 ~ 50 µ m, so it is very crisp, and extremely easy to break into flaky powder, and then we can get magnesy neodymowe magnetic powder after crystallization processing.

　　The second is Hydrogenation method, this method is using the hydrogen absorption characteristics of rare earths and transition metal compounds to make the magnesy neodymowe ingot break into small pieces of 2 ~ 5 cm, and put them in the hydrogen, then elevate temperature to make it disproportionation. Finally, after dehydrogenation treatment, we can get magnesy neodymowe powder of fine grain and high coercive force.

　　Finally, other preparation methods are reducing diffusion method, atomization method and mechanical alloying method.

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