SmFeN magnet can replace NdFeB magnet in some processes.
Advantages of SmFeN magnet
- Price advantage: The raw material cost of SmFeN permanent magnets is significantly lower than that of NdFeB permanent magnets, because the price of rare earth raw material samarium oxide is much lower than that of neodymium oxide.
- Performance advantage: SmFeN permanent magnet materials have higher coercivity and higher magnetic energy product, which improves the magnetic properties of traditional flexible bonded magnets to a new level.
- Widely used: SmFeN permanent magnets are widely used in consumer electronics, automotive industry and other fields, and the market size is expected to grow at a compound annual growth rate of 3.5% in the next few years.
Substitution status and future trends
At present, SmFeN permanent magnets have begun to replace NdFeB permanent magnets in some fields. For example, Tesla is developing permanent magnet electric vehicle machines that do not contain rare earth elements to reduce the complexity and cost of electronic equipment. In addition, major global manufacturers such as Sumitomo Metal Mining, Daido Electronics and Nichia Corporation are also actively producing and promoting SmFeN permanent magnets.
In summary, SmFeN permanent magnets have significant advantages in performance, cost and application, and are expected to replace some NdFeB permanent magnets in more fields in the future.
Conclusion
As the third generation of permanent magnet materials, SmFeN permanent magnet materials can replace NdFeB injection magnets in some applications, and their properties are equivalent to or better than isotropic NdFeB bonded magnets. In addition, SmFeN permanent magnet materials have excellent intrinsic magnetic properties and are expected to become a new generation of rare earth permanent magnet materials.
Temperature-resistant SmFeN is a shortcoming and is not comparable to high-temperature magnets: FeCrCo, AlNiCo and SmCo. Samarium cobalt can withstand temperatures of 350 degrees, iron-chromium-cobalt can withstand temperatures of 450 degrees, aluminum-nickel-cobalt can withstand temperatures of 550 degrees. The permanent damage resistance of the material far exceeds that of samarium-iron-nitrogen.