Knowing the characteristics of both magnets and their main features, their conditions and possibilities, their disadvantages, will allow us to decide for the use of one or the other according to our needs before deciding for a specific type. In addition, we will be able to see during this article, the main utilities that are being given to one and another type of magnet at the present time.
Alnico magnets consists mainly of aluminium, nickel and cobalt. This type of magnet, increasingly used and with characteristics that make it highly recommendable for certain actions and in certain sectors, has a high remnant induction. However, we must affirm that it has a low coercitivity.
Alnico’s magnets have stability at extreme temperatures, maintaining, even in the worst conditions, their characteristics and magnetization at temperatures between -250ºC and 425ºC. The Alnico magnet has a high magnetic induction and we can see its use, above all, in measuring devices and magnetic field detection systems.
However, we must not forget that Alnico is a rather fragile material and can only be handled during the casting process, not after this process, so it is not manipulable once melted.
The orientation of the material is carried out during the heat treatment, so that a magnetic field with the defined magnetization direction can be achieved. The state and the way it behaves in the face of oxidation is good.
Today they are the most powerful magnets on the market. They have a high coercitivity and a high remanence, which allows to design new models and their introduction in new fields for their application, above all, in limited spaces, with little space, or where a high magnetic field is necessary.
However, we must warn that the temperature can condition us when using these magnets, although we have a wide range ranging from 200 º C to 350 º C. These magnets do not present any oxidation problems either. Moreover, we can say that these types of magnets have a high resistance to corrosion. Cobalt-Samarium magnets withstand and operate at temperatures below 0°C.
Samarium Magnets are among the strongest and are mainly used in generators, electric motors, sensors and measurement technology. In highly technological processes, the samarium magnet is indispensable. It is a special permanent magnet and we must highlight its high performance.
As already mentioned, Samarium magnets belong to the rare earth family. Samarium, in combination with cobalt, is an alloy used primarily in the production of permanent magnets.
Today Samarium magnets are mainly used in the motor industry. They can be found in electric, direct current, linear and servo motors, as well as in brake technology. Also in sensor technology.
In general we can say that both rare earth magnets are very versatile. And some of its properties such as flexibility, functionality and precision stand out, which makes us able to give it almost unlimited uses. There are many fields of application in which we can see your application.
For all this we can say that the resistance to corrosion, as well as the density of energy and its perfect use at high temperatures are its main characteristics and what makes it different from many others.