The rapid development of the electronic information industry has also put forward various new requirements for high-frequency inductive components (such as high-frequency transformers, small inductors, etc.), and it is also required to improve and improve the main components of the inductor components - ferrite The performance of the body core. Therefore, higher material standards and requirements have been proposed for soft ferrite materials and magnetic core components, such as miniaturization, chip formation, high frequency, high performance, and low loss of components. Among soft ferrites, the most demanding materials and the most pressing requirements for performance improvement are high frequency low power loss ferrite materials and high permeability ferrite materials. High-frequency low-power loss ferrite materials are mainly used in various high-frequency miniaturized switching power supplies (such as AC-DC, DC-AC converters) and display flyback transformers; high-permeability ferrite materials are mainly It is used for anti-electromagnetic interference devices for broadband transformers and pulse transformers. It has been reported that the production of these two materials already accounts for more than 60% of the total production of soft ferrite. The main requirements for power ferrite materials are: high magnetic permeability (mi2000), high Curie temperature (Tc), high apparent density (d), high saturation magnetic induction (Bs) and high frequency. Ultra low core loss (Pc). The main requirements for high permeability ferrite materials are: high magnetic permeability (mi12000), high apparent density (d), low core loss (tand/mi) at high frequency and low field, and excellent Frequency extension characteristics (f-L). The main requirements for the ferrite core element itself are: optimum electromagnetic performance and performance consistency, precise mechanical dimensions and sufficient mechanical strength and good process quality (including appearance quality and shape defects).
Looking at the changes in the production of soft ferrites in various countries in recent years, it can be seen that the production pattern of the world soft ferrite has changed a lot.