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As a highly cost-effective metallic soft magnetic material, iron-based nanocrystalline alloys are composed of iron, silicon, boron, niobium, and copper. Through a specialized crystallization annealing process, an ultra-fine nanocrystalline grain structure of 10–20 nm is formed internally. This material not only boasts superior magnetic properties, including high saturation magnetic induction, high permeability, and low core loss, but also exhibits excellent toughness and corrosion resistance. Currently, it is progressively replacing silicon steel, permalloy, and ferrites, becoming the preferred choice for manufacturing mid-to-high-frequency transformers, instrument transformers, and common-mode inductors.


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Square cores are a common cross-sectional shape for electromagnetic components such as transformers and reactors. They are manufactured by winding or stacking iron-based nanocrystalline, amorphous, or silicon steel sheets, followed by a shaping and setting process.


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Iron-based amorphous bulk alloys (also known as iron-based bulk metallic glasses) represent a significant product form of iron-based amorphous alloys. They refer to bulk amorphous alloy materials with centimeter-scale thicknesses, fabricated through specialized processes. Unlike traditional iron-based amorphous ribbons (which are only 20–80 μm thick), iron-based amorphous bulk alloys achieve a breakthrough from "micron-scale ribbons" to "centimeter-scale bulk materials" while maintaining their amorphous atomic structure, thereby opening up entirely new possibilities for the application of amorphous alloys.


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Common mode inductors, also commonly referred to as common mode chokes, are vital passive components in electronic circuits. Their core function is to suppress common mode interference signals while allowing normal differential mode signals or DC power to pass through without attenuation. This ensures the stable operation of electronic equipment and helps meet electromagnetic compatibility (EMC) standards.


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