Bismuth ferrite-based ceramic with excellent magnetoelectric properties and preparation method thereof

The invention discloses bismuth ferrite-based ceramic with excellent magnetoelectric properties and a preparation method of the bismuth ferrite-based ceramic. The bismuth ferrite-based ceramic is a bismuth ferrite-based ceramic material with co-doping at an A position and a B position, the Curie ferroelectric transition temperature TC of the bismuth ferrite-based ceramic material is higher than the Neel temperature TN, and the difference value between the TC and the TN ranges from 10 DEG C to 60 DEG C. The bismuth ferrite-based ceramic is prepared by adopting a standard solid-phase reaction sintering method, and the method comprises the following steps: proportioning raw materials according to a stoichiometric ratio, carrying out primary ball milling, conducting sieving, conducting presintering at 860-880 DEG C to obtain pre-synthesized powder, and carrying out secondary ball milling, sieving, granulating, tabletting and other processes to obtain a BiFeO3-based ceramic green body withexcellent magnetic proper