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SDM Magnetics Co., Ltd.
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Model Samarium Cobalt Block -Magnet for Aerospace and Automotive Applications

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Samarium Cobalt (SmCo) block magnets, identified as the second generation of rare earth permanent magnets, consist primarily of samarium, cobalt, and iron. These magnets can be categorized into two types: SmCo 1:5 and SmCo 2:17, each differing in composition. The SmCo block magnet is defined by its dimensions of length, width, and thickness, with the thickness dictating the magnetization direction. These magnets exhibit remarkable resistance to corrosion, oxidation, high temperatures, and demagnetization, outperforming many other types of permanent magnets, including sintered neodymium magnets. Due to these properties, SmCo block magnets are extensively utilized in aerospace, automotive, and military sectors, where reliability under extreme conditions is critical. Their efficacy is further supported by their ability to maintain performance in high-stress environments, making them a preferred choice for demanding applications.
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As the second generation of rare earth permanent magnet, Samarium Cobalt magnet is mainly composed of Samarium, Cobalt, and Iron. Samarium Cobalt magnet can be classified to 1:5 type and 2:17 type according to the composition. SmCo block magnet is also measured by length (L), width (W), and thickness (T), where the last dimension indicates the magnetization direction. SmCo block magnet has excellent resistance to corrosion, oxidation, high temperature, and demagnetization in comparison with other permanent magnet material, especially sintered Neodymium magnet. It still widely uses in aerospace, automotive, and military applications.