Introduction to soft magnetic materials
First, the development of soft magnetic materials
The application of soft magnetic materials in the industry began in the late 19th century and was accompanied by the rise of electric power and telecommunications technology, and its application range is extremely wide. Soft magnetic materials are not only used in the home appliance field, information technology field, automobile field and other supporting fields, but more importantly, soft magnetic materials have brought a constant demand as the main raw material for the production of electronic components. In recent years, its market demand has increased year by year, and the variety of products has also increased, becoming a highlight of the development of the magnetic materials industry.
Second, the classification of soft magnetic materials and market conditions
From the application range, the current mainstream soft magnetic materials on the market include soft ferrite, silicon steel sheet, metal soft magnetic powder core, amorphous, nanocrystalline magnetic materials. According to Seri research, the global soft magnetic material market in 2017 was around RMB 55 billion, of which the soft ferrite market was about RMB 10.6 billion.
Third, the trend of soft magnetic technology
In the early 1970s, TDK, FDK, Philips, etc. developed the first generation of power ferrite materials, mainly used in switching power supplies, but at the time there were many defects in the products, and the power consumption was high. After decades of development, ferrite materials have undergone continuous technological advancement and have developed into two widths (wide temperature, wide frequency), two high (high magnetic flux, high DC-Bias), and two low (low loss, low). Distortion) One of the basic functional materials.
With the increasing efficiency and miniaturization of electronic devices, new requirements have been placed on soft ferrites. In the next 10 years, the key development directions are: power ferrite development towards high frequency, low power consumption and high saturation flux density; high permeability ferrite highlights high initial permeability μi, wide frequency, wide Temperature characteristics requirements.