Since
the first Neodymium Magnets were produced back in 1982, they have been growing
more and more popular. It
is
clear that these magnets are
studied,
developed and produced by a well-known and
respected company, General
Motors. It was not long before their use spread way beyond the initial one required. Neodymium ball magnets can be made by two
methods
-
either the bonded process
or the sintered
process.
With the sintered process, the products are melted and then set to the shape of
an ingot. Once cooled, the ingot will be shattered into tiny pieces and then
the small pieces are reformed into blocks which then have their surface treated
before they are magnetized.
With
bonded magnets, thin slices are melt-spun and then smashed to small pieces.
Then a polymer is added and then the magnet is formed into the shape required including
the ball or spherical shape. The bonded magnets are easier to shape and when
there is the need for a ball or arc battery then this is the way to do it. In
2013, China produced most
of these magnets, which
is estimated to be 75%
of the worlds’ consumption.
Classified
as rare-earth magnets,
they have
usage hazards that do not appear in
other types of magnets. There is possibility
to cause physical injury due to the strong magnetic force
these magnets
possess, but this will only be the case if they are not used appropriately.
One
of the great advantages of neodymium
ball magnets is that they never lose their strength. There is no need to
worry that they are going to have to be replaced regularly as they will do the
job they are intended to do for a long time. In many cases there will be two
years of hard use before there are any problems at all.
One big problem when using a ball magnet is exposure to heat, but it would have
to be more than 100°C.This will be the ideal type of magnet to use when there
is the need for a very high magnetic force and a lot of electric current needs
to be provided. Their use is as wide and varied as can be imagined. They can be
found in spacecraft instruments and loudspeakers, medical instruments and
magnetic therapy products.
Although
they are strong and have some amazing
applications,
they are also widely available online and have many applications
at home.
Many scientific
projects that children bring home from school will require them, apart from which they
can be used to stick freshly painted pictures to the fridge. If this is done
however, children should be warned not to play with neodymium block magnets, especially if there is
more than one,
as they can be dangerous. There were
cases of bones broken and also if swallowed, they can cause digestive problems
and have been known to kill.
Based in
California, Stanford Magnets has been involved in the R&D and sales of
licensed Rare-earth permanent magnets, Neodymium magnets and SmCo magnets,
ceramic magnets, flexible magnets and magnetic assemblies since the mid of
1980s. We supply all these types of magnets in a wide range of shapes, sizes
and grades.
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