Post by Eagle Racing on May 2, 2015 3:55:58 GMT -7
Modern Magnet Materials:
Since the early days there has been many developments in magnet materials, modern materials can be summarized into five different types:
* Neodymium-Iron-Boron
* Samarium-Cobalt
* Ceramic (Barium ferrite or Strontium-Ferrite)
* Alnico (Al-Ni-Co)
* Flexible or Plastic magnets
Neodymium and Samarium-Cobalt are referred to as Rare Earth Magnets because they contain Rare Earth Elements Neodymium or Samarium and are the strongest of the magnets available.
Ceramic magnets have good coercive properties, and are low cost.
Alnico magnets were commercialized in the 30's and are still used today, especially in areas where very high operating temperatures are required.
Plastic magnets are simply magnet powder bonded by a plastic or rubber binder. Because of the binder, the strength is never the same as a magnet made out of the powder by itself. The plastic magnet, however is lower cost, and can be made into different shapes easily, and of course can be made as a flexible magnet.
(Thank You Slick 7)