Magnets are arranged according to their magnetic force: NdFeB magnets, AlNiCo magnets, and Ferrite magnets
1. NdFeB magnet
Characteristics: NdFeB magnet is a permanent magnet material based on the intermetallic compound Nd2Fe14B. NdFeB magnets have extremely high magnetic energy product and coercive force. At the same time, the advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology, thus making instrumentation, electroacoustic motors, magnetic separation etc.
Material characteristics: The advantages of NdFeB magnets are high performance and good mechanical properties. The disadvantages are low Curie temperature point, poor temperature resistance, and easy to powder and corrode. It is necessary to adjust its chemical composition and adopt surface treatment methods.
2. Ferrite magnet
Features of ferrite magnets: Its main raw materials include BaFe12019 and SrFe12019. Made through ceramic technology, it is relatively hard and brittle material. Because ferrite magnets have good temperature resistance, low price, and moderate performance, they have become the most widely used permanent magnets.
Ferrite magnet application areas: widely used in electricity meters, instruments, motors, automatic controls, microwave devices, radar and medical equipment, etc.
3. Alnico magnet
Characteristics of Alnico magnet: It is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. The casting process can be processed into different sizes and shapes, and the machinability is very good. Cast AlNiCo permanent magnets have the lowest reversible temperature coefficient and the operating temperature can be as high as 600 degrees Celsius or more. AlNiCo magnets are widely used in various instrumentation and other application fields