China Disc SmCo Manufacturer, Supplier, Factory

In the demanding world of magnetic applications, from aerospace and defense to high-performance motors and sensors, engineers and procurement specialists relentlessly seek components that deliver unwavering reliability and peak energy. Among the advanced solutions available, Disc SmCo magnets stand as a premier choice. Sintered Samarium Cobalt magnets are renowned for their exceptional performance in extreme environments where other magnet types might falter. This comprehensive guide delves into the intricacies of Disc SmCo magnets, providing detailed technical specifications, application insights, and answers to frequently asked questions to inform your next critical design or purchasing decision.

Understanding Disc SmCo Magnets

Disc SmCo magnets are a specific form of Samarium Cobalt permanent magnets, shaped into a flat, circular geometry. This shape is particularly advantageous for applications requiring a concentrated magnetic field from a compact axial direction. The "SmCo" denotes their composition—an alloy of Samarium (Sm) and Cobalt (Co), often with additional elements like Iron, Copper, and Zirconium to fine-tune magnetic and physical properties. They belong to the rare-earth magnet family, offering significantly higher performance than traditional ferrite or Alnico magnets. Their key advantages include:

They maintain magnetic performance at temperatures up to 350°C, with some grades functional beyond 500°C.

They offer a high energy product, providing strong magnetic fields from small volumes.

Unlike Neodymium magnets, SmCo magnets are highly resistant to oxidation and corrosion, often not requiring protective coatings.

Their magnetic properties change very little with temperature fluctuations, ensuring consistent performance.

They are highly resistant to being demagnetized by external magnetic fields or high temperatures.

Key Product Parameters and Specifications

Selecting the right Disc SmCo magnet requires a detailed understanding of its technical parameters. Below are the critical specifications presented in both list and table formats for clarity.

Primary Magnetic Properties

 Indicates the material's magnetic performance. Common series include SmCo 1:5 (e.g., 18, 20, 22) and SmCo 2:17 (e.g., 26, 28, 30, 32). Higher numbers generally indicate a higher maximum energy product (BHmax).

Measures the magnetic flux density the magnet can produce in a closed circuit, expressed in milliTesla (mT) or kiloGauss (kG).

Indicates the magnet's resistance to demagnetization. Intrinsic Coercivity (Hcj) is especially critical for high-temperature operation.

The peak value of magnetic energy density, representing the strongest magnetic field the magnet can produce per unit volume. Measured in Mega-Gauss Oersteds (MGOe).