Introduction To Common Magnets
October 08, 2021

Neodymium iron boron magnet:

Characteristics: It is a permanent magnet material based on intermetallic compound Nd2Fe14B. It has very high magnetic energy product and coercivity. At the same time, the advantages of high energy density make NdFeB widely used in modern industry and electronic technology, which makes it possible to miniaturize, lightweight and thin equipment such as instruments and electroacoustic motors.

Material features: NdFeB has the advantages of high cost performance and good mechanical properties; The disadvantage is that the Curie temperature point is low, the temperature characteristics are poor, and it is easy to be powdered and corroded. It must be improved by adjusting its chemical composition and adopting surface treatment methods in order to meet the requirements of practical application.

Manufacturing process: Nd-Fe-B is manufactured by powder metallurgy process.

Shape: rare earth neodymium magnet can produce cylindrical, circular, rectangular, tile and special-shaped.

Neodymium iron boron magnet

Ferrite magnet:

Features: the main raw materials include BaFe12O19 and SrFe12O19. It is made by ceramic process. It is a brittle material with hard texture. Because ferrite magnet has good temperature resistance, low price and moderate performance, it has become the most widely used permanent magnet; It has high magnetic properties, good time stability and low temperature coefficient.

Application: widely used in electric meters, instruments, motors, automatic control, microwave devices, radar and medical devices.

Magnetization direction: it can be magnetized axially, radially or as required.

Shape: it can produce cylindrical, annular, rectangular and tile shapes.

Ferrite Magnet

Al Ni Co magnet:

Features: 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 with good machinability. Cast alnico permanent magnet has the lowest reversible temperature coefficient, and the working temperature can be as high as more than 600 ℃. Alnico permanent magnet products are widely used in various instruments and other application fields.

Magnet classification: it can be divided into cast Al Ni Co and sintered al Ni Co.

Application place: Cast Al Ni Co products are mainly used in automotive parts, instruments, electroacoustics, motors, teaching, aerospace, military and other fields. They have the advantages of low temperature coefficient, high temperature resistance, moisture resistance, not easy oxidation and good working stability. Sintered al Ni Co is produced by powder metallurgy. It is suitable for producing products with complex shape, light, thin and small. It is widely used in instruments, communications, magnetoelectric switches and various sensors.

Shape: can produce cylindrical, circular, rectangular, tile, horseshoe.

Alnico Magnet

Samarium cobalt magnet:

It is a kind of magnetic material made of samarium, cobalt and other rare earth metal materials through proportioning, solution refining into alloy, crushing, molding and sintering. It has high magnetic energy product and extremely low temperature coefficient. The maximum working temperature can reach 350 ℃, and the negative temperature is unlimited. When the working temperature is above 180 ℃, its maximum magnetic energy product, temperature stability and chemical stability exceed that of Nd-Fe-B permanent magnetic material. It has strong corrosion resistance and oxidation resistance; Therefore, it is widely used in aerospace, national defense and military industry, microwave devices, communication, medical equipment, instruments, meters, various magnetic transmission devices, sensors, magnetic processors, motors, magnetic cranes, etc.

Shape: disc, ring, square strip, tile shape and special shape can be processed according to the requirements.

Samarium Cobalt (SmCo) Magnets

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