Rare earth magnets are the strongest type of permanent magnet
currently made.They are composed of neodymium iron boron magnetic
material and are plated in nickel-copper-nickel for a shiny
corrosion resistant finish. They are magnetized through the
thickness. They are can customizzed sizeand have innumerable uses.
SmCo5 magnet is composed of SmCo alloy with Sm Co ratio of 1:5.
According to weight, Sm accounts for 36% of the total. This SmCo
alloy usually contains 36% Sm and a small amount of Co. This series
of SmCo magnets can provide a maximum magnetic energy product of 25
MGOe and a reversible temperature coefficient of - 0.05% / ℃. In
addition, this series is easier to calibrate to a specific magnetic
field than Sm2Co17 series. The Sm2Co17 magnet consists of SmCo
alloy with a SmCo ratio of 2:17. It also contains other elements,
such as iron, copper, zirconium and hafnium in a small amount. The
magnetic energy product of this property is higher, up to 32 MGOe,
and the reversible temperature coefficient is - 0.03% / ℃.
| Raw Material Ratio | Energy Density | ReversibleTemp.coefficient |
| SmCo5 | Sm:Co=1:5 | 25MGOe | - 0.05% / ℃ |
| Sm2Co17 | Sm:Co=2:17 | 32 MGOe | - 0.03% / ℃. |
Samarium cobalt permanent magnet is a rare earth permanent magnet
made of rare earth elements such as samarium and cobalt. Compared
with NdFeb, samarium cobalt permanent magnets are better suited to
work at high temperatures. It can maintain good temperature
stability and chemical stability above 180°. Samarium cobalt
permanent magnets are mainly used in defense, aerospace, microwave
equipment, medical equipment, communications, instrumentation,
various magnetic transmission equipment, magnetic processors,
sensors, voice coil motors, magnetic cranes, etc. Samarium cobalt
permanent magnet can withstand high temperature 250~ 350 degrees
and Curie temperature 700~ 840 degrees. This is the unique samarium
cobalt permanent magnet, high magnetic, high operating temperature.
However, if an aesthetically pleasing or corrosion-resistant
coating is desired, nickel, zinc, gold, or epoxy or other coating
may be used. As for the application of samarium cobalt permanent
magnets, they are mainly used in very complex working environments
due to their good magnetic stability. Therefore, they are very
suitable for manufacturing a variety of high-performance permanent
magnet rotors.
