Samarium cobalt magnet:

Samarium cobalt magnet (SmCo) is the second generation of rare earth permanent magnets. It is a magnetic tool material made of samarium, cobalt and other metal rare earth materials after being mixed into alloys, crushed, pressed and sintered. Currently, there are mainly 1:5 type (SmCo5) and 2:17 type (Sm2Co17). Its main characteristics are high magnetic properties, good temperature performance, the highest operating temperature up to 250-350 Degrees Celsius, Curie temperature from 700 to 800 degrees Celsius, negative temperature is not limited. At a temperature above 180¡æ, BHmax, coercivity, temperature stability and chemical stability are superior to ndfeb permanent magnet. Compared with the ndfeb magnets, samarium cobalt magnet is more suitable for working in high temperature environment, strong corrosion resistance and oxidation resistance, generally do not need to electroplating processing, so the surface is very suitable for manufacturing various high performance permanent magnet motor and working environment is very complex application products, such as aerospace, national defense, microwave devices, communication, medical equipment, instruments, meters, all kinds of magnetic processor, magnetic actuator, sensor, motor, magnetic crane, etc.

Samarium, the main component of cobalt magnets, is very expensive and vulnerable to price fluctuations (the cobalt market is sensitive) because samarium is found in low stocks on Earth.

Smco magnet | permanent magnet

Parameters of samarium cobalt magnet:

Maximum magnetic energy product :(Bhmax)

160-150 KJ/m3 (15-35 MGoe)

Maximum operating temperature (TEMP.TW)

250-350.

Intrinsic coercive force (HcJ)

KA/m

Magnetic induction coercivity - Hcb

650-870 (KA/m),4-12(Koe)

Residual magnetism - Br

8 and 12 (KGs), 0.8 1.2 (T)

Reversible temperature coefficient of remanence (Br)

0.04-0.01

Samarium cobalt magnet production process:

Ingredients - > vacuum smelting -- -- -- -- -- -- -- -- > > system powder molding sintering -- -- -- -- -- -- -- -- > > performance - > mechanical processing -- -- -- -- -- -- -- -- > > cleaning test -- -- -- -- > packaging

These alloys are usually in the unmagnetized state of processing. Samarium cobalt for wet fine grinding (water-cooled cooling) and diamond grinding wheels. This process is required if drilling holes or other functions are limited. The waste produced by grinding must not be completely dried, because samarium cobalt has a low ignition point. A small spark, such as produced with static electricity, can be easily burned. The temperature of a fire can be very high and difficult to control.