Teflon (PTFE) Coated Magnets, Teflon Coating Alnico / Rare Earth Magnets, PTFE Stirring Magnets, Teflon Coated Neodymium – Smco Magnet Bars / Stirrer, Magnetic Stir Bar

As the teflon material has great property of high temperature resistance ,magnets should be matched with high temperature grades accordingly.

Usually, the grade of "H" is needed for neodymium magnets at the least.

Advantage:

a. Hight temperature resistance, permanent,steady.
b. smooth, very small frictional force.
c. Resistance to acid and alkali

d.Plenty of sizes for choose

Disadvantage:

The thickness of teflon is 1mm at the least, which reduce part of the magnetic field and magnetic force.

One of the important application is stir magnet for lab:

A Teflon PTFE Coated Magnets stirring rod and a stir bar are tools used to mix liquids for thorough blending and to speed up chemical reactions in solutions.  Stir bars have a  plastic casing around a magnet, and are used with a magnetic stirrer. Certain models have an FDA-approved polytetrafluoroethylene (PTFE) casing for use in food, drug, and cosmetic applications. A magnetic stir bar, or spin bar, is available in various shapes and sizes, and may have a pivot ring to reduce friction and improve spinning. An octagonal shape creates a stronger vortex than round or cylindrical shapes. Cross or star shapes spin with greater stability and less vibration. Cell shapes produce minimal vortexing and are typically used in cuvettes.

Teflon coated magnets are for applications that require low friction and high resistance to liquids and ultrasonic cleaning. Teflon also helps protect the magnet from chipping or breaking. PTFE coated magnetic stirring bars with a raised ring in the middle to aid stirring stability and reduce noise. Sizes are carefully selected to cover a wide range of applications. If you require a specific size that is not available on our website, please contact us for a custom stirring magnet quote.

Basic Principle:

To use the magnetic field of the same poles mutual repulsion and opposite poles attract. Using constantly changing magnetic field drives the stir magnet circular motion to achieve the purpose of stirring liquid,makes the samples evenly mixed .

Stir magnets running under heating control system can better achieve the purpose of stirring liquid.

The shape and sizes are available: