Teflon
Teflon Coating Magnets
Teflon-coated magnets, also known as PTFE-coated magnets, are permanent magnets—typically neodymium-iron-boron (NdFeB)—that have been encapsulated or covered with a layer of Polytetrafluoroethylene (PTFE). PTFE is a synthetic fluoropolymer known for its exceptional chemical inertness, high-temperature stability, and non-stick properties. The primary purpose of this coating is to protect the underlying magnet from environmental degradation, such as corrosion, moisture, and exposure to harsh chemicals, which can otherwise compromise the structural integrity and magnetic performance of the material.
Teflon Coating Magnets
The application of a Teflon / PTFE coating provides several distinct advantages. Physically, the coating offers a very low friction coefficient (often less than 0.1), making it ideal for applications requiring sliding or non-stick surfaces. Chemically, it is highly resistant to strong acids, alkalis, and organic solvents, allowing the magnets to function in aggressive environments where standard nickel-plated magnets would fail. Furthermore, PTFE Teflon coatings provide excellent electrical insulation and can withstand continuous operating temperatures typically ranging up to 260°C. It is important to distinguish between “coated” magnets, which have a thin layer applied via electrostatic spraying or powder coating, and “encased” magnets, which are fully enclosed using methods like compression molding or welding to provide a seamless, robust barrier for extreme conditions.
When designing with these components, engineers must account for the coating thickness. For instance, high-performance Teflon coatings can be approximately 4 mm thick, which significantly reduces the effective dimensions and pull force of the internal magnet. Alternatively, thinner coatings like Xylan (20–30 microns) are available for applications where space is constrained and magnetic performance must be preserved. Common industrial and laboratory applications include magnetic stirrer bars, metallic impurity detection in lithium-ion battery manufacturing, and use in corrosive chemical processing environments.
Teflon PTFE Octahedral Rare Earth Magnets
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Teflon Oval Egg Shaped Rare Earth PTFE Magnets
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PTFE ELLIPTICAL RARE EARTH MAGNETS
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Rare Earth Cylindrical PTFE Magnets
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Ball Sphere Magnetic Stirring Bar Teflon PTFE
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PTFE Spherical Magnetic Stirring Bar 12mm
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Ball Magnetic Stirring Bars
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Borosilicate Glass Encased Magnetic Stirring Bars
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PTFE White Glass Coated Magnetic Stir Bars
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Glass Encapsulated Magnet Stirring Bar
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Borosilicate Magnetic Stir Bar For High Temperature Reactions
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Disposable Magnetic Stirring Bars Teflon PTFE
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PTFE SQUARE Magnetic Stir Bars
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V-Shaped PTFE Magnetic Stir Vane
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Wing Style Magnetic Stir Bars PTFE
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Color-Coded Magnet Dumbbell-Style Stir Rods
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Circulus Dumbbell-shaped Magnets PTFE Stir Bars
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Colorful Magnetic Dumbbell Stirring Bar
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Dumb Bell Stirring Bar Magnet
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Dumbell Shape Magnetic Stir Bar AlNiCo
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Double Ended Magnetic Stir Bar
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Teflon PTFE Triangle Magnet Stir Bars
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Teflon Coated Triangular Bar Magnets
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Plastic Rectangular Triangle Magnetic Stirring Bar
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Triangular Bar PTFE ALNICO V MAGNET
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PTFE Triangular Magnetic Stirring Bars
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Spinstar Teflon Magnetic Stirring Bar fits Beakers
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PTFE Beaker Bar Magnetic Stirrer
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