What is Maximum Working Temperature of a Permanent Magnet?

What is Maximum Working Temperature of a Permanent Magnet? Permanent magnets are widely applied in various motors, sensors/instruments and electronics, their temperatures almost vary more or less during work. These temperature variations are resulted from eddy current effect and/or ambient temperature variation. Due to thermal fluctuation and magnetic domain evolution, a permanent magnet loses some or all magnetic flux when its temperature elevates. Here comes a question, how high temperature can a permanent magnet withstand to work? For a commercial… Read More

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How to Understand the Grade of Sintered SmCo Magnet?

How to Understand the Grade of Sintered SmCo Magnet? Samarium cobalt (SmCo) magnets include 1:5 type (SmCo5) and 2:17 type (Sm2Co17) magnets. For both of sintered SmCo5 and Sm2Co17 magnets, their grades basically include three parts, i.e. “letter 1” + “number” + “letter 2”. Similar to sintered NdFeB magnets, the three parts in sintered SmCo magnets’ grades also present material type, (BH)max value (in CGS unit) and Hcj level, respectively. The difference is that the left part “letter 1” are… Read More

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