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Neodymium-Iron-Boron(NdFeB)
magnets are
recently
developed
magnetic
materials
in1980's,
with
magnetic
characteristics
far
exceeding
those of the
Alnico and
Ceramic/Ferrite
types. They
are alloys
of the Rare
Earth group
of
element-neodymium.
The
composition
is Nd2Fe14B.
Offering the
highest
energy
products
ever
available in
production
permanent
magnet
materials,
NdFeB has
been widely
used in high
performance
stepper, DC,
servo, and
linear
motors,
actuators,
loudspeakers,
headphones,
instrumentation,
switches,
relays,
magnetic
imaging for
medical and
geophysical
applications,
holding
systems,
magnetic
bearings,
magnetic
couplings,
hard disk
drives,
etc..
Magnets made
from NdFeB (
Neodymium
Iron Boron)
are the most
powerful
permanent
magnetic
materials
commercially
available,
possesses
high energy
ranging from
8 MGOe to
50MGOe and
wonderful
coercive
force. As
the third
generation
of Rare
Earth
permanent
magnet,
NdFeB
products are
less brittle
than SmCo,
Nd-Fe-B
magnet is
widely used
in motor,
instrument,
aviation and
the
high-tech
field.
Neodymium
magnets are
highly
susceptible
to
corrosion.
We offer a
variety of
coating and
plating
options to
prevent
corrosion
and
mechanical
damage, such
as Metallic
Zinc,
Nickel,
Nickel+Nickel,
Copper+Nickel,
Nickel+Copper+Nickel,Gold,
Organic
Epoxy,
Nickel+Epoxy
coating.
Super-Strength
Rare Earth
Magnet----Sintered
NdFeB
magnets,
have the
characteristics
of :
-
Super
strong
Br
Resident
induction.
-
Excellent
demagnetization
resistance
capability.
-
Good
Price
relative
to its
high
magnetic
properties.
-
Coating
is
needed
for
NdFeB
(Painting,
coating,
or
plating
is
therefore
highly
recommended
for
NdFeB.
Plating
NdFeB is
a
difficult
process,
and
commercial
plating
houses
are
unlikely
to be
able to
achieve
plating
with
good
adhesion.
Nickel,
Zinc, or
Tin
plating
provides
good
corrosion
resistance
for
NdFeB
magnets.
We are
also
able to
cadmium
chromate
or
aluminum
chromate
plate
NdFeB
using
vacuum
deposition
techniques.
A
variety
of
organic
coatings
have
also
been
successfully
developed
for
NdFeB,
exhibiting
good
corrosion
resistance
characteristics.
For
especially
harsh
environments,
it may
be
advisable
to use a
combination
of
coating
techniques,
or to
encapsulate
the
material
in a
sealed
housing)
NdFeB are
available in
sintered as
well as
bonded
forms.
Sintered
NdFeB parts
however,
will produce
the highest
magnetic
properties.
NdFeB is
sensitive to
heat and
should not
be used in
the
environments
that exceed
200 degree
centigrade.
Bonded NdFeB
are
generally
low in
properties
due to the
special
process of
gluing the
powder in a
mold. The
sintered
form usually
some
finishing
operations
in order to
hold close
mechanical
tolerances.Although
bonded
magnets do
not possess
magnetic
properties
as advanced
as those of
sintered
magnets,
they can be
made in
shapes and
sizes that
are
difficult to
achieve with
sintering.
NdFeB
magnets are
brittle
(though not
as brittle
as the SmCo
types), and
machining
operations
should be
performed
prior to
magnetization,
using
diamond
tools. We
are equipped
to fabricate
these
materials to
blueprint
specifications.
All NdFeB
magnets,
except the
bonded NdFeB
material,
are
anisotropic,
and can only
be
magnetized
in the
orientation
direction.
Bonded NdFeB
material is
isotropic
and can be
magnetized
in any
direction,
and with
multiple
poles,
although
special
magnetizing
fixtures are
required for
this.
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