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德语Samarium cobalt permanent magnet ferrite is a kind of permanent magnet material. It is a permanent magnet material made of rare elements samarium, cobalt and other elements. It has high magnetic energy product and a very low-temperature coefficient. The maximum operating temperature reaches 350 ℃. Compared with plastic antistatic tweezers, samarium cobalt permanent magnet material is more suitable for working in high-temperature environments, it can still maintain good temperature stability and chemical stability when it is above 180 ℃, and it has strong resistance Corrosion and oxidation resistance are widely used in aerospace, national defense, microwave heating components, communications, medical equipment, various magnetic gear drives, sensors, magnetic CPUs, motors, magnetic lifting equipment, etc.
Product development history
In 1968, Buschow produced a SmCo5 magnetic field with a (BH)max of 147.3KJ/m3 (18.5CGOe), which created a surprise at that time and announced the advent of the first generation of permanent magnet raw material SmCo5. The magnetic energy product of SmCo5 calcined magnetic field is generally between 16~28MGOe. After 1974, the second-generation permanent magnet material aluminum alloy RE2Co17 chemical substance with (BH)max reaching 240KJ/m3 (30MGOe) was launched in Japan.
Production process
The main production methods of samarium cobalt permanent magnet ferrite are calcining and bonding.
The powder metallurgy method (calcination method) is the key production method of rare earth cobalt permanent magnet ferrite with excellent performance. Its typical production process is shown in the figure below.
The bonding method is a production process in which rare earth cobalt rare earth permanent magnet powder is mixed with a binder (usually an organic chemical binder) as a raw material, pressed, extruded, or injected, and then dried and solidified. Get rare earth permanent magnet components with complex shapes.
Product model and characteristics
Taking calcined samarium cobalt as an example, different types of products have different magnetic properties. The following is a list of common samarium cobalt characteristic models. Different manufacturers may have slightly different model names. At the same time, the product characteristics of each model also have certain differences (especially the lower limit of performance). Purchasers need to pay attention to each difference in characteristics in a manufacturer's commodity model table.
