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Nanocrystalline magnetic core has high Bs, high effective permeability, high DC bias stability, high temperature stability, wide frequency adaptability, low power consumption, low-cost new soft magnetic material, used in high power, high frequency, Miniaturized, high conversion rate switching power supply transformers and choke coils.
Now solar industry inverters, water energy, air energy, and electric energy conversion and charging of hybrid vehicles have a large market space and future, because the performance of nanocrystalline magnetic cores is extremely controllable.
The nanocrystalline magnetic core is subjected to surface insulation treatment, mixed evenly with the binder, pressed and annealed. There are basically three ways to obtain nanocrystalline powder: the amorphous strip is broken after annealing and crystallization, mechanical alloying, and molten alloy atomization. At present, mechanical alloying is still in the stage of laboratory research, and the crystallization method of amorphous strips is produced in small batches by a few companies in China, but the market cannot be expanded due to cost reasons. Compared with other methods, the molten alloy atomization method has high efficiency and low cost. The disadvantage is that the powder produced has low amorphous content and high loss.