Magnetics Business & Technology - September/October 2024 - 34

TECH TIPS
Coating from Integran Applies Nanotechology to Magnetic Shielding
In all cases, notes Integran, the plating process adds magnetic
shielding without adding unnecessary bulk and processing
steps of traditional formed magnetic shields. In addition to low
frequency shielding, it can provide high frequency shielding in
applications where skin thickness is not a concern. Alloys of
77% nickel, 16% iron, 5% copper, and 2% chromium or molybdenum
and other high nickel content specialty metal alloys
are commonly used for high performance magnetic shielding
applications, where high magnetic permeability is important
in achieving the maximum magnetic attenuation performance
-- in contrast to high frequency EMI shielding where a merely
conductive coating, like silver or copper, will suffice.
Design engineers searching for a fresh approach to their magnetic
shielding needs may want to consider the possibilities
that nanotechnology might offer by electroplating or electroforming
a magnetic shield coating onto their product. One such
solution comes from metallurgical nanotechnology specialist
Integran of Mississauga, Canada whose products based on
its electrodeposited nanocrystalline Nanovate metal platform
are frequently used in aerospace, medical and military-based
industries.
Nanovate EM from the company has good soft magnetic properties
such as high magnetic permeability and good saturation
magnetization. Aside from the obvious processing benefits of
coating a part, it is nanocrystalline and does not suffer from
shock drop or strain sensitivity in magnetic shielding performance
seen with traditional large grain size materials. When
electroplated, Nanovate EM can add magnetic shielding to a
wide variety of parts like electronics enclosures and housings,
inertial navigation sensors such as optical gyroscopes and others
made from a variety of materials:
Machined aluminum - On its own aluminum is transparent to
magnetic fields and therefore magnetic interference. This is
the most common electronics enclosure material for electronics
like optical gyroscopes, power supplies, sensors, vacuum
chambers to which Nanovate magnetic shielding can be
added, especially since good dimensional control of the shield
can be maintained. Integran can either supply the magnetic
field shielded aluminum to the drawing specifications, or plate
the aluminum parts.
Thermoplastic polymers - Similar to aluminum, polymers do
not provide any magnetic shielding on their own but Nanovate
EM can be plated directly onto a wide variety of plastics
to impart magnetic shielding. It is a particularly good solution
where weight of the final shield is of critical importance, or the
complexity of the part lends itself to injection molding.
Stamped mild steel - Mild steel has poor magnetic permeability,
but decent magnetic saturation. Adding Nanovate EM
can boost the shielding performance of mild steel. Common
applications are where cost is critical, volumes are high and
product weight is less important.
Other Materials - Adding a soft magnetic coating to a nonmagnetic
material like aluminum or stainless can create interesting
products for sensor coil coupling applications. Nanovate
EM can be selectively plated onto them.
34 Magnetics Business & Technology * September/October 2024
www.MagneticsMag.com
For more info, see www.integran.com.
http://www.integran.com http://www.MagneticsMag.com

Magnetics Business & Technology - September/October 2024

Table of Contents for the Digital Edition of Magnetics Business & Technology - September/October 2024

Contents
Magnetics Business & Technology - September/October 2024 - Cover1
Magnetics Business & Technology - September/October 2024 - Cover2
Magnetics Business & Technology - September/October 2024 - Contents
Magnetics Business & Technology - September/October 2024 - 4
Magnetics Business & Technology - September/October 2024 - 5
Magnetics Business & Technology - September/October 2024 - 6
Magnetics Business & Technology - September/October 2024 - 7
Magnetics Business & Technology - September/October 2024 - 8
Magnetics Business & Technology - September/October 2024 - 9
Magnetics Business & Technology - September/October 2024 - 10
Magnetics Business & Technology - September/October 2024 - 11
Magnetics Business & Technology - September/October 2024 - 12
Magnetics Business & Technology - September/October 2024 - 13
Magnetics Business & Technology - September/October 2024 - 14
Magnetics Business & Technology - September/October 2024 - 15
Magnetics Business & Technology - September/October 2024 - 16
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Magnetics Business & Technology - September/October 2024 - 33
Magnetics Business & Technology - September/October 2024 - 34
Magnetics Business & Technology - September/October 2024 - Cover3
Magnetics Business & Technology - September/October 2024 - Cover4
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