Permanent Magnet Assembly Magnetic Coupling, Flexible magnets
What are the components of samarium and cobalt?
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% / ℃.
SmCo Series 1:5
SmCo Series 1:5 has one atom of rare earth samarium and five atoms
of cobalt. By weight this magnet alloy will typically contain 36%
samarium with the balance cobalt. SmCo magnets generally have a
reversible temperature coefficient of -0.05%. The maximum working
temperature is about 350 ℃.
SmCo Series 2:17
SmCo Series 2:17 are age-hardened with a composition of two atoms
of rare-earth samarium and 13-17 atoms of transition metals(TM).
The TM content is rich in cobalt, but contains other elements such
as iron and copper.
Other elements like zirconium, hafnium, and such may be added in
small quantities to achieve better heat treatment. By weight, the
alloy
will generally contain 25% of samarium. The maximum energy of these
alloys ranges from 24 to 30 MGOe. SmCo magnets generally have
a reversible temperature coefficient of -0.03% ℃. The maximum
working temprature is 350℃
| Raw Material Ratio | Energy Density | ReversibleTemp.coefficient |
| SmCo5 | Sm:Co=1:5 | 25MGOe | - 0.05% / ℃ |
| Sm2Co17 | Sm:Co=2:17 | 32 MGOe | - 0.03% / ℃. |
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