High-magnetism ferroferric oxide material and preparation method thereof

The invention relates to the field of novel magnetic materials, and provides a high-magnetism ferroferric oxide material and a preparation method thereof.The method comprises the steps that S1, electrolyte soaking is conducted, specifically, a ferroferric oxide workpiece material is cleaned and put into an electrolyte to be soaked for set time; s2, hydrogenation modification treatment: performing electrochemical atom hydrogenation treatment by taking the ferroferric oxide workpiece material soaked in the electrolyte as a cathode, adsorbing atom hydrogen generated by a cathode electrolytic reaction on the surface of the ferroferric oxide workpiece material, and diffusing into the material under the action of concentration gradient to modify the ferroferric oxide workpiece material; and S3, cleaning and drying. The saturation magnetization and coercive force of the ferroferric oxide material prepared by the method are greatly improved, the residual magnetization is strengthened, the material still keeps high ma