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Views: 0 Author: Site Editor Publish Time: 2023-03-01 Origin: Site
The magnetic properties of ferrite magnets also show that they have high permeability at high frequencies. Therefore, ferrite magnets has become a non-metallic magnetic material widely used in the field of high frequency weak current. Because the magnetic energy stored in the unit volume of ferrite magnets is low, the saturation magnetic induction (Bs) is also low (usually only 1/3~1/5 of pure iron), which limits its use in the low frequency that requires higher magnetic energy density. Applications in the field of high power and high power.
What are the physical and chemical properties of ferrite magnets?
What are the product features and characteristics of ferrite magnets?
What is the reason for choosing ferrite magnets?
Ferrite magnets are special magnetic materials with magnetic and electrical properties. Therefore, studying them has commercial and scientific significance for electronics, home appliances, communications, automotive, energy storage devices, chip ferrite markets, etc. The application of understanding the correlation between structure, magnetism and application requires a concerted effort among chemists. Physicists and materials scientists study the basic properties and potential applications.
Significant saturation magnetization
High resistivity
Low electrical losses
Very good chemical stability
Ferrites are usually classified as "soft" or "hard" depending on their magnetic properties.
Soft ferrites - used in transformers or electromagnetic cores. They have low coercivity (Mn-Zn ferrite, Ni-Zn ferrite).
Hard ferrites - have high coercivity. They are inexpensive and are widely used in household products such as refrigerator magnets (strontium ferrite, barium ferrite).
Soft ferrites do not retain significant magnetization, while hard ferrite magnetization is considered permanent.
Ferrite components are made from powdered precursors that are pressed and then sintered (fired) in a kiln. The mechanical and electromagnetic properties of the ferrite are heavily influenced by the sintering process, which is time - temperature - atmosphere dependent.
Ferrites shrink when they are sintered. Depending on the specific ferrite, the shrinkage can range from 10% to 17% per size. Maintaining the correct dimensional tolerances and preventing the cracking and warping associated with this shrinkage is a fundamental concern of the manufacturing process.
The choice of ferrite magnets or also known as ceramic magnets is corrosion resistant - they can be used in water without corrosion at all. While not as powerful as rare earth neodymium magnets (NdFeB), their high coercivity and relatively low cost make them ideal for use in electric motors and high temperature motors.
Ferrite magnets are ideal for low cost applications.
Ferrite magnets are also electrically insulated - they do not allow eddy currents inside.
Ferrite magnets are well suited for higher temperatures, but are not ideal for very cold applications.
Ferrite magnets are also known as ceramic, Feroba magnets and hard ferrite magnets. They are one of the most widely used permanent magnet materials in the world. Ferrite magnets are a low-cost magnet material that is ideal for high-volume production. They are known as ceramics due to their excellent electrical insulating ability.
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