Low-loss amorphous and nanocrystalline magnetic sheet and preparation method thereof
A nanocrystalline, low-loss technology, applied in the manufacture of inductors/transformers/magnets, preventing/reducing unwanted electric/magnetic effects, transformers, etc., can solve problems such as large losses, reduce losses, and slow down saturation flux The effect of reduction, high permeability
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Embodiment 1
[0028] Heat the nanocrystalline strips at 380 degrees Celsius for 1 hour and 550 degrees Celsius for 1 hour to perform embrittlement treatment, and then use double-sided adhesive to bond the PET substrate film, and roll the bonded nanocrystalline strips to crush them. The formation average area is 0.25mm 2 fragments; nitric acid is mixed with ethanol, and the volume fraction of nitric acid is 10%, to obtain a passivation solution; the passivation solution is uniformly sprayed on the nanocrystal fragments after rolling, and the spray thickness is 5 μm; the nanocrystals sprayed with the passivation solution The strip is dried in an oven at a temperature of 40 degrees Celsius, and then die-cut to obtain a nanocrystalline magnetic sheet with low magnetic loss.
[0029] The magnetic performance test was carried out on it. At 100KHz, the real part of its magnetic permeability is 1200, and the imaginary part of its magnetic permeability is less than 180.
Embodiment 2
[0031] Heat the amorphous strip at 380 degrees Celsius for 1 hour, carry out embrittlement treatment, and then use double-sided adhesive tape to bond it with the PET substrate film, and roll the bonded amorphous strip to form an average area of 1mm. 2 Fragments; mix nitric acid and propanol, and the volume fraction of nitric acid is 30%, to obtain a passivation solution; spray the passivation solution evenly on the amorphous fragments after rolling, and the spray thickness is 2 μm; the amorphous fragments sprayed with passivation solution The strip is dried in an oven at a temperature of 60 degrees Celsius, and then die-cut to obtain an amorphous magnetic sheet with low magnetic loss.
[0032] The magnetic performance test is carried out on it. At 100KHz, the real part of its magnetic permeability is 1250, and the imaginary part of its magnetic permeability is 182.
Embodiment 3
[0034] Heat the nanocrystalline strip at 380°C for 0.5 hours and at 545°C for 1 hour to perform embrittlement treatment, and then use double-sided adhesive to bond it to the PET substrate film, and roll the bonded nanocrystalline strip to form an average Area is 2mm 2 fragments; mix nitric acid with isopropanol, and the volume fraction of nitric acid is 50%, to obtain a passivation solution; spray the passivation solution evenly on the nanocrystalline fragments after rolling, and the spray thickness is 12 μm; The crystal strips are dried in an oven at a temperature of 70 degrees Celsius, and then die-cut to obtain nanocrystalline magnetic sheets with low magnetic loss.
[0035] The magnetic performance test is carried out on it. At 100KHz, the real part of the magnetic permeability is 1300, and the imaginary part of the magnetic permeability is 192.
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