A stir bar is th emagnetic stir barplaced within the liquid wihich provides the stirring action. The
stir bar's motion is driven by another rotating magnet or assembly
of electromagnets in the stirrer device, beneath the vessel
containing the liquid.Stir bars are typically coated in teflon, or
less often in glass. Glass coatings are used for liquid alkali
metals (exceptlye, which will eat through glass) and alkali metal
solutions in ammonia.
Both coatings are chemically inert and do notcontaminate or react
with the reaction mixture they are in.
They are bar shaped and often octagonal in cross-section (sometimes
circular), although a variety of special shapes exist for more
efficient stirring. Most stir bars have a ridge around the center
(called a pivot ring) on which they rotate. The smallest are only a
few millimeters long and the largest a few centimeters. Astir bar retrieveris a separate magnet on the end of a long stick (usually coated
with teflon) which can be used to remove stir bars from a vessel.
Specification of magnetic stir bar
1.Material: inside Alnico/NdFeB magnet, outside Teflon
2.High remanence,high coercive force ,high energy
3.Maximum working temperature: 350 degree centigrade
4.Products manufactured according to ISO:9001 quality system and we
have certificate of SGS
6.Delivery time:Within 7 days after confirmed order;
7.Service:we will do our best to serve you if we have the
opportunity to cooperate with you.