toroid iso

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Going Above Curie Temperatures

Curie temperature can be defined as the temperature at which materials will lose all their magnetic properties. Simply put, excessive and high heat diminishes the magnetic qualities of materials. It is named after Pierre Curie, who was the man responsible for showing that magnetism can be lost at critically high temperatures. Different materials have different Curie temperature points depending on their characteristics.

toroid coils

When a material or device goes beyond the high-temperature point, it will lose all of its useful properties in the circuit. A core that has an insulated coating will be ruined as temperatures begin to reach the Curie temperature.
Strip wound cores can be permanently altered because of exceeding Curie temperature. It does not need long exposure for this to happen. Strip and powder core have high Curie temperatures (450°C). Manganese-zinc ferrites have a lower Curie temperature (120°C – 300°C). Lowering temperature below Curie temperatures, can makes devices function correctly. If the material has been oxidized or held at high temperatures for too long, they will be permanently broken.

All devices come with a temperature rating that should not be exceeded. Exceeding temperature ratings will prevent machines from functioning correctly. For more information on dealing with Curie temperatures of the toroid coils, reach out to our team today.

 

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