High-frequency transformer nanocrystalline magnetic core material and preparation method thereof

The invention belongs to the technical field of nanocrystalline materials, and particularly provides a nanocrystalline magnetic core material for a high-frequency transformer and a preparation method thereof.The nanocrystalline magnetic core material comprises, by weight, 60-80 parts of nanocrystalline soft magnetic powder with the molecular formula of FeaSibBcXdCue, X is one or more of Nb, Co, Mo and Ce, 60 < = a < = 68, 10 < = b < = 15, 2 < = c < = 6, 4 < = d < = 6, 6 < = e < = 13, a + b + c + d + e = 100, 10-20 parts of graphene quantum dots, 10-15 parts of zinc oxide quantum dots and 4-6 parts of dopamine. According to the preparation method, the nanocrystalline soft magnetic powder, the graphene quantum dots and the zinc oxide quantum dots are combined, and the nanocrystalline magnetic core material is synthesized through dopamine adjustment and multi-stage heating heat treatment re-crystallization, so that the overall electromagnetic performance of the magnetic core material is effectively improved, and