What are the components of samarium cobalt magnets? What is the proportion of each?

SmCo5 magnet is composed of samarium cobalt alloy with SM CO ratio of 1-5, that is, one samarium atom and five cobalt atoms. Samarium accounts for 36% of the total by weight. This samarium cobalt magnet alloy usually contains 36% samarium and a small amount of cobalt. This series of SmCo magnets can provide a maximum magnetic energy product of 25MGOe and a reversible temperature coefficient of -0.05% /℃. In addition, this series is easier to calibrate to a specific magnetic field than Sm2Co17 series.

Sm2Co17 magnet is composed of samarium cobalt alloy, and the SmCo ratio is 2:17, that is, 2 samarium atoms and 17 cobalt atoms. It also contains other elements, such as iron, copper, zirconium and hafnium, but the quantity is very small. The magnetic energy product of this property is higher, up to 32MGOe, and the reversible temperature coefficient is -0.03% / ℃.

The specific proportion is rare earth metal samarium SM: 23-28%

Rare metal cobalt Co: 48-52%

Metallic element Fe: 14-17%

Metallic element Cu: 5-7%

Add a small amount of zirconium Zr: 2-3%