The difference between NdFeB magnets and SmCo magnets

1. Different components: There is no obvious difference in the appearance of the two finished magnets. In terms of material components, NdFeB is made of rare earth metal neodymium, metallic element iron, non-metallic element boron, and a small amount of dysprosium, terbium, etc.; samarium cobalt magnets are made of rare earth metals Samarium, cobalt, metal elements iron, copper, and a small amount of zirconium are added.

2. Different performance: Samarium cobalt magnetic steel has high magnetic energy product, extremely low temperature coefficient, the maximum working temperature can reach 350 ℃, and the negative temperature is not limited. When the working temperature is above 180 ℃, its temperature stability and chemical stability are equal. Exceeds NdFeB permanent magnet materials. However, if the overall performance of samarium cobalt magnets is slightly weaker than that of neodymium iron boron if they are evaluated and compared in terms of application fields, manufacturing costs, and comprehensive performance.

3. The ability of high temperature resistance, oxidation resistance and corrosion resistance is different. The content of iron in NdFeB is very high, which is easy to be oxidized and corroded, and needs to be treated by electroplating. The iron content in samarium cobalt magnets is relatively small, the surface coating process is relatively low, and the application fields and terminals are wider than NdFeB magnets.

4. Different values: For samarium cobalt magnets and NdFeB magnets with the same performance and size, the market price of NdFeB is slightly lower than that of samarium cobalt. The main reason is that the content of iron in NdFeB magnets is high, the content of rare earth elements is low, and the price of iron is cheap, so the price of NdFeB is cheaper. The rare earth elements samarium and cobalt in samarium cobalt magnets account for about 70%, so the price is slightly higher.