toroid nanocrystalline core
Iron nanocrystalline alloys consist of iron, silicon, boron, niobium and cuprum. The iron-based amorphous alloy containing Cu and Nb will form very fine grain structure when it is annealed above the crystallization temperature. The grain size is only 10-20 nanometers, and this amorphous alloy can form crystalline materials by special crystallization annealing which are called nanocrystalline alloys. Nanocrystalline materials have the excellent properties of high saturation magnetic induction intensity, high permeability, low coercivity, low loss and good stability, high toughness,wear and corrosion resistance, etc. Because the nanocrystalline materials has optimum performance and price in metal soft magnetic materials, it can replace silicon steel, premalloy and ferrites to be the ideal materials for middle and high frequency transformer, mutual inductor, inductance component.