Ferrite magnetic material is the simplest and the earliest natural magnetic material in the world. Modern ferrites are generally divided into permanent ferrites, soft ferrites, and spin ferrites. Ferrite has low cost, good performance, simple production process, and can save a lot of precious metals. It is a promising non-metal magnetic material. Ferrite magnets are hard and brittle with low magnetic energy. However, it is not easy to demagnetize, not easy to corrode, the production process is simple, and the price is low. Therefore, the ferrite magnet has the highest output in the entire magnet industry and is widely used in industrial production.