First, what is samarium cobalt magnet?
Samarium-cobalt magnets were introduced in the 1970s and were the first commercial rare earth collider. Their launch was revolutionary, three times the maximum energy product of any other collider at the time. Before the introduction of samarium-cobalt magnets, the standard for magnetic materials was an aluminum-nickel diamond alloy magnet. Samarium-cobalt magnets have been the strongest knock-iron until their increasing production costs prompted engineers to look for cheaper alternatives and formulate Ndfeb magnets, which are now the strongest magnets in the world.
The most commonly used grade of samarium-cobalt magnets is made of about 35% (Sm) and 60% (Co) and a small amount of iron (Fe), copper (Cu), (Hf) alloy (Z) and praseodymium (Pr). Some grades of samarium cobalt magnets are made entirely of samarium and cobalt and have excellent corrosion resistance.
Two, samarium cobalt magnet temperature
Samarium cobalt magnets are called SmCo magnets, which belong to the rare earth permanent magnet system column like Ndfeb magnets. Although they are not as powerful as neodymium magnets, they have two distinct advantages over neodymium magnets. They are in a higher temperature range and are more resistant to corrosion. And from 150 degrees Celsius will be better than the high temperature resistance of the Ndfeb magnet. Usually, the maximum working temperature of ordinary Ndfeb magnets is only 80 degrees Celsius. Therefore, in relatively high temperature environments or applications, samarium cobalt magnets are also a good choice.
Samarium-cobalt magnets not only perform well at high temperatures, but also retain their magnetic properties even at temperatures below absolute dew (-273 degrees Celsius), making them popular in low-temperature applications.
Three, samarium cobalt magnet corrosion resistance
Since most grades of samarium cobalt magnets contain little or no iron, this gives them excellent corrosion resistance, while neodymium magnets typically contain 60-75% iron. Therefore, samarium cobalt magnets generally do not require electroplating treatment.
Four, samarium cobalt magnet magnetic properties
Compared with the NdFeb magnet, the magnetic properties are not as good as the samarium cobalt magnet, but the magnetic properties are stronger than the general magnetic ferrite, which is equivalent to a low grade NdFeb magnet.
Five, samarium cobalt magnet price
Due to the cost of producing samarium, samarium cobalt magnets have the disadvantage of being expensive compared to neodymium magnets. Like other rare earth magnets, they are also very brittle and therefore best suited for applications that do not require direct impact.
Six, samarium cobalt magnet use
Because of their properties, samarium-cobalt magnets are most commonly used in applications that require high temperature work, such as generators, pump couplings, sensors, motors, Marine applications, and automotive, aerospace, military, food, and manufacturing industries.
