Application of the magnet is not uncommon in daily life, this paper introduces some knowledge about neodymium iron boron magnets.
of all, many people may wonder how long the magnetism of neodymium iron
boron magnet can last. About this question, neodymium iron boron magnet
has high coercive force, so generally, in the natural environment and
the general conditions of magnetic field there would not be
demagnetization or changes of magnetism. Assuming the environment is
appropriate, even after a long time of use, the loss of magnetism will
not be great. So in practical application, we often ignore the factor of
time effect on the magnetic properties. But if working in harsh
environments for a long time, the magnet can appear demagnetization as
So, what is the main influence factor of neodymium
iron boron magnet’s magnetism? It is the environmental temperature.
Since the sintered NdFeB is very sensitive to temperature, the
instantaneous maximum temperature and sustained maximum temperature of
environment may lead to different degrees of magnet demagnetization,
including reversible and irreversible demagnetization, and recoverable
and unrecoverable demagnetization.