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AlNiCo magnets, are made up of a composite of aluminum, nickel and cobalt with small amounts of other elements, have good temperature stability, good resistance to demagnetization, high residual induction, and relatively high energies. By strength, they are much weaker than NdFeB magnets, SmCo magnets and Ferrite magnets.
Alnico magnets are produced by two typical methods, casting or sintering. Casting delivers higher energy products and allows for the design of intricate shapes. Sintering is usually restricted to smaller sizes and offers slightly lower magnetic properties, but has tighter dimensional tolerances due to its processing.
AlNiCo magnets can be produced with either is otropic or anisotropic
properties. Alnico 5 and Alnico 8 are anisotropic and exhibit a preferred
direction of orientation, Magnetic orientation should be specified
on your drawing when you send an order to us. Cast Alnico 5 is the
most commonly used of all the cast Alnico's. It combines high indications
with a high energy product of 5 MGOe or more and is used extensively
in rotation machinery, communications, meters and instruments, sensing
devices and holding applications.
AlNiCo magnets have wide range of working temperatures, up to 550oC.
They have experienced renewed interest in recent years in such temperature-sensitive
applications as hall-effect and MR-based automotive and electronic
sensors, in addition to the traditional magnetron, TWT amplifiers,
actuators, motors and instruments applications that have long relied
upon Alnico. |
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