Near field communication magnetic sheet with low magnetic permeability and temperature coefficient and preparation method thereof

The invention provides a near field communication magnetic sheet with low magnetic permeability and temperature coefficient, and a preparation method thereof, belonging to the field of near field communication. The near field communication magnetic sheet with low magnetic permeability and temperature coefficient comprises principal components and auxiliary components. The principal components comprise, by mol, 48 to 55% of Fe2O3, 12 to 20% of ZnO, 15.5 to 20% of NiO, 13 to 16% of CuO, 0 to 3% of MnCO3, 0.01 to 0.025% of Bi2O3 and 0 to 0.05% of Co2O3; and the auxiliary components comprise, by mol, 1% of SiO2 and 0 to 3% of WO3. The preparation method comprises the following steps: mixing the principal components, water and grinding balls, carrying out ball milling so as to obtain slurry and successively carrying out separating, drying and pre-burning; carrying out crushing and sieving, adding the auxiliary components, adding water, successively carrying out ball milling, sieving, drying and mixing with water-based tape casting slurry so as to obtain tape casting slurry and subjecting the tape casting slurry to ball milling, sieving and defoaming so as to obtain defoamed tape casting slurry; carrying out tape casting so as to obtain a ferrite sheet blank and subjecting the ferrite sheet blank to drying and heat treatment; and sintering the treated ferrite sheet blank and bonding the sintered ferrite sheet blank with an adhesive tape so as to obtain the near field communication magnetic sheet.