Among all the rare earth magnetic materials, samarium cobalt permanent magnet is one of the best permanent magnetic materials known to have the best temperature resistance, which can be categorized into powder metallurgy method (sintering) and bonding method according to the difference of production process. According to the time of development and application, samarium cobalt permanent magnet material can be divided into the first generation of samarium cobalt (SmCo5) and the second generation of samarium cobalt (Sm2Co17), the following is the introduction of the difference between SmCo5 and Sm2Co17 magnets.
1. Different Composition
SmCo1:5 magnet is also known as SmCo5, the main ingredients are samarium, cobalt, praseodymium, or just pure samarium cobalt without iron.
SmCo2:17 magnets are also known as Sm2Co17, the main components are samarium, cobalt, copper, iron and zirconium, the iron content means that it may corrode slightly in high humidity environments, so Sm2Co17 magnets are coated with nickel in some cases.
2. Magnetic Property Differences:
SmCo5 magnets have relatively low coercivity (coercivity is the ability of a magnetic material to resist a magnetic field that destroys its own magnetism), but have a high remanent magnetism to coercivity ratio, and therefore exhibit better stability in harsh environments.
Sm2Co17 magnets have a higher coercivity and are capable of generating higher magnetic field strengths, but have a lower remanent magnetization to coercivity ratio, and therefore exhibit better performance at high temperatures or in strong magnetic field environments.
3. Different physical characteristics
The above figure lists the physical property parameters of SmCo5 and Sm2Co17 for you in detail, including temperature resistance, density, temperature coefficient, resistivity, etc. ......
4. Price difference
The cobalt content of SmCo5 is higher than that of Sm2Co17, so the price of SmCo5 is higher than that of Sm2Co17 under the same specification, Now the samarium cobalt magnets on the market are basically 2:17 samarium cobalt magnets.
Overall, there are some differences between SmCo5 and Sm2Co17 in terms of chemical composition, magnetic properties, operating temperature, physical properties, and price, which allows for the selection of a suitable material based on the needs of a particular application.
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