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Samarium Cobalt Block Magnet Description

samarium cobalt block magnet, a type of rare-earth magnet, is a strong permanent magnet made of an alloy of samarium and cobalt. They are generally ranked similarly in strength to neodymium magnets but have higher temperature ratings and higher coercivity. They are brittle and prone to cracking and chipping.

Samarium Cobalt Block Magnet Application

SmCo block magnets are widely used in sensors, speakers, reed switches, motor, rotor, wind turbines/generators, AC/DC motors, drive motors, servo motors, etc.

Stanford Magnets is specialized in manufacturing and supplying SmCo block magnets applied in various industrial applications. We have advanced technology, rich experience, and professional engineering technicians in this field. If you require a specific size, please contact us for a custom SmCo magnet quote.


What is a SmCo block magnet?
A SmCo block magnet is a type of rare-earth magnet made from an alloy of samarium and cobalt, shaped into a rectangular or square block. These magnets are known for their high magnetic strength, excellent temperature stability, and resistance to corrosion.
How strong are SmCo block magnets?
SmCo block magnets are very strong, with magnetic properties that allow them to be used in various high-performance applications. While not as strong as the highest grades of Neodymium magnets, they offer sufficient magnetic strength for most applications requiring high temperature stability and corrosion resistance.
What are the main advantages of SmCo block magnets?
The main advantages include high magnetic strength, exceptional temperature stability (with some grades functioning up to 300°C or 572°F), and excellent resistance to corrosion, which eliminates the need for protective coatings.
Can SmCo block magnets be used at high temperatures?
Yes, one of the defining features of SmCo magnets is their ability to maintain magnetic properties at high temperatures, making them suitable for applications in environments up to 300°C (572°F) for some grades.
Do SmCo block magnets need protective coatings?
No, SmCo magnets have excellent corrosion resistance and generally do not require protective coatings, making them ideal for use in harsh or corrosive environments.
What applications are SmCo block magnets used in?
They are used in a variety of applications, including aerospace and defense, automotive (especially in electric vehicle motors and sensors), medical devices like MRI machines, and industrial machinery requiring high-temperature operation.
Are SmCo block magnets brittle?
Yes, like other rare-earth magnets, SmCo magnets are brittle and can chip or crack if not handled carefully. It's important to avoid letting them snap together or strike hard surfaces.
How do SmCo block magnets compare to Neodymium magnets?
SmCo magnets offer better temperature stability and corrosion resistance than Neodymium magnets, making them more suitable for high-temperature and harsh environmental conditions. Neodymium magnets, however, provide higher magnetic strength at room temperature and are generally more cost-effective.
How are SmCo block magnets manufactured?
The manufacturing process involves melting the raw materials, casting the alloy, pulverizing it into a fine powder, pressing the powder in a magnetic field, sintering, and then machining the magnet to its final block shape. The magnets are magnetized after final machining.
What factors should I consider when choosing a SmCo block magnet for my application?
Consider the required magnetic strength, operating temperature range, exposure to corrosive environments, and any specific size or shape requirements. The unique advantages of SmCo magnets, such as their temperature stability and corrosion resistance, make them suitable for specific applications where these properties are critical.

Protocols and articles

Related Articles
How Are Samarium Cobalt Magnets Made?
Common Applications of Samarium Cobalt Magnets
How Does Temperature Affect Samarium Cobalt Magnets?
What Are SmCo Magnets, and How are They Made?
Samarium Cobalt Magnets: Features and Applications


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