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Directory:Magnets:Ceramic

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Ceramic Magnets

Info from Bunting Magnetics

Economical Magnets Stocked For A Wide Range of Applications - excerpts below from bunting-magnetics.com

: "CERAMIC GRADES 5, 8, & 1 have become the most widely specified magnetic materials. Low cost, light weight, a relatively high energy product, and good resistance to demagnetization account for the widespread use of ceramic magnets."

: "CERAMIC 5 MAGNETS become highly oriented during the manufacturing process and must be magnetized in the direction of their orientation."

: "Ceramics are sintered from Barium or Strontium Ferrite."

: "They retain about 45 percent of their room-temperature magnetic specifications at 350 degrees Fahrenheit."

: "Degradation with increasing temperature is nearly linear, and changes in magnetization are essentially reversible up to approximately 840 degrees F, at which temperature Ceramic magnets become completely demagnetized."

: Demagnetization Curves for Ceramic 5 & 8 Magnets shown (see link above)

: "CERAMIC 5 MAGNETS become highly oriented during the manufacturing process and must be magnetized in the direction of their orientation."

: "CERAMIC 8 MAGNETS are made from a premium strontium base material that exhibits an excellent peak energy product and even greater resistance to demagnetization than its Ceramic 5 counterpart. Its higher coercive properties result in a more useful operating slope. Like Ceramic 5, it is a highly oriented material and must be magnetized in the direction of orientation."

: "Ceramic 8 is an excellent choice wherever magnet length is at a minimum or where the magnetic circuit is subject to severe demagnetizing fields. Some typical uses include holding magnets, motors, reed switches, and Hall-Effect devices."

: "CERAMIC 1 MAGNETS are not oriented during manufacture but will exhibit slightly greater magnetic strength along the direction of the pressing (along their shortest dimension)."

More Info

Except the Grades mentioned above, there are also several other grades of magnets: There are C1, C5, C7, C8, C10.

For more information, please check it on Stanford Magnets

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