Samarium Cobalt Magnets VS Neodymium Magnets

Differences Between Samarium Cobalt and Rare Earth Neodymium Magnets:

1. Magnetic Strength: Rare earth NdFeB magnets are renowned as the "king of magnetism" for their formidable strength, surpassing samarium cobalt magnets, which rank just below neodymium iron boron in magnetic performance.

2. Temperature Resistance: Rare earth neodymium magnets reaches a maximum temperature of 220 degrees only with materials of 28AH and above, while Sm2Co17 can withstand temperatures up to 350 degrees. Around 300 degrees, neodymium iron boron loses magnetic force, while samarium cobalt can operate normally without requiring demagnetization.

3. Stability: Rare earth neodymium magnets exhibits a large residual magnetism temperature coefficient, decreasing residual magnetism with rising temperatures. In contrast, samarium cobalt magnets have a smaller residual magnetism temperature coefficient, with minimal demagnetization and higher stability. Neodymium requires plating to prevent oxidation, corrosion, and weathering, while samarium cobalt with cobalt coating often doesn't require plating, ensuring a longer lifespan and appealing aesthetics.

4. Price: Neodymium rare earth magnets contain small amounts of rare earth elements neodymium and boron, making it relatively more affordable. On the other hand, samarium cobalt magnets contain a higher proportion of rare earth elements samarium and cobalt, resulting in a higher price.

Conclusion: Compared to rare earth NdFeB magnets, samarium cobalt magnets excel in higher temperatures and more corrosive environments. While neodymium magnets boast stronger magnetic fields and the highest BHMax in today's permanent magnets, samarium cobalt provides superior performance in specific conditions and is priced higher due to its composition of rare earth elements samarium and cobalt.