In 1930, a permanent magnet with a spinel (MgA12O4) structure was discovered. Due to its brittle nature, complex process, low magnetic properties, and cobalt content, this type of magnet was not widely used at that time. After 20 years of continuous development, a high resistance non-metallic magnetic material - ferrite - was born on the basis of spinel. This brought revolutionary changes to the radio industry, pulse, and microwave technology at that time. In the 1970s, due to the easy oxidation, low Curie temperature, and high cost of metal permanent magnet materials, ferrite had the opportunity to develop. At present, ferrite has become the highest production permanent magnet ferrite material.

Magnetic materials are the fundamental functional materials in the electronics industry. Permanent magnet materials, as an important component of magnetic materials, play an important role in industries such as electronics, information technology, motorcycles, electric tools, and automobiles. Permanent magnet ferrite materials are functional materials that generate magnetic fields.

The current era is the electronic age, without permanent ferrite, there would be no electronic industry. As a basic functional material in the electronic industry, permanent ferrite has penetrated into various fields of human production and life. It has been widely used in automobiles, motorcycles, televisions, audio systems, computers, communication terminals, medical instruments, and other fields, and is an important aspect of energy development.

Introduction to Permanent Magnet Ferrite Materials

Permanent magnet ferrite, also known as ferrite permanent magnet, is a compound with uniaxial anisotropy and a hexagonal structure. It is a composite oxide permanent magnet material with Fe2O3 as the main component. According to different production processes, it can be divided into sintered permanent magnet ferrite and bonded permanent magnet ferrite. Among them, sintered permanent magnet ferrite can be divided into dry compression molding and wet compression molding, while bonded permanent magnet ferrite can be divided into extrusion molding, rolling molding, and injection molding. Bonded permanent magnet ferrite has softness, elasticity, and torsion.