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Nanocrystalline cores have high Bs, high effective permeability, high DC bias stability, high temperature stability, wide frequency adaptability, low power consumption, low-cost new soft magnetic materials, applied to high-power, high-frequency, Miniaturized, high conversion rate switching power supply transformers and chokes.
Nowadays, solar energy industry inverters, water energy, air energy, and electric energy conversion and charging of hybrid vehicles have a great market space and future, because the performance of nanocrystalline magnetic cores has extremely high controllability.
The nanocrystalline magnetic core undergoes surface insulation treatment, and is uniformly mixed with the bonding agent, then pressed into shape and annealed. There are basically three ways to obtain nanocrystalline powder: amorphous strips are crushed after annealing and crystallization, mechanical alloying, and molten alloy atomization. At present, mechanical alloying is still in the laboratory research stage, and the amorphous strip crystallization method has a small number of domestic companies producing in small batches, but it is unable to expand the market due to cost reasons. Compared with other methods, the molten alloy atomization method has high efficiency and low cost. Its disadvantage is that the powder produced has low amorphous content and high loss.
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