In addition to iron, a permanent magnet material mainly composed of aluminum, nickel, and cobalt is mainly incorporated. In the 30s and 60s of the 20th century, it occupied an important position in the application of permanent magnet materials. However, since the 1970s, the permanent ferrite has developed rapidly. At the same time, the magnetic properties of rare earth cobalt permanent magnet materials have surpassed that of aluminum-nickel-cobalt materials, and the properties of processable plastic iron-chromium-cobalt permanent magnets can be compared with it, so its dosage is reduced. However, its demagnetization due to temperature changes is smaller than other materials, so it is still commonly used in meters.
Post time: Sep-28-2019