FERRITE MAGNET

Ferrite Magnets

A ferrite is a type of  ceramic  compound composed of  iron oxide  (Fe 2 O 3 ) combined chemically with one or more additional  metallicelements . [1]  They are both  electrically nonconductive  and  ferrimagnetic , meaning they can be  magnetized  or attracted to a magnet. Ferrites can be divided into two families based on their magnetic  coercivity , their resistance to being demagnetized. Hard ferrites have high  coercivity ; they are difficult to demagnetize. They are used to make  magnets , for devices such as  refrigerator magnets ,  loudspeakers and small  electric motors . Soft ferrites have low  coercivity . They are used in the electronics industry to make  ferrite cores  for  inductors  and transformers , and in various  microwave  components. Yogoro Kato and Takeshi Takei of the  Tokyo Institute of Technology  invented ferrite in 1930. [2]

  • Isotropic / anisotropic hybrid magnets can cover a very large range of magnetic properties. Magnetic properties can be tailor made over a very broad spectrum.
  • Sintered ferrite magnets can be replaced in a lot of applications by proper selection of magnetic material.
  • It is an very promising material for the future due to advantages of higher magnetic properties than ferrite magnets and lower costs than the rare earth magnets.

  • Very high magnetic properties compared to injection molded ferrites.
  • Greater cracking and chipping resistance than compression molded magnets.
  • Excellent mechanical strength.
  • Very good surface finish.

  • Injection bonded magnet manufactureing process has a unique advantage of in-situ molding of steel shafts, brass bushes etc while molding of the magnets.
  • Monobloc molding with metal and other objects make a wide range of applications possible.
  • Monobloc moldings also reduces the number of operations required to manufacture the magnet assembly.
  • Moreover, it leads to reduction in costs and at the same time enhances the bond between the metal insert and the magnet.
  • Insert molding / over molding is preferred wherever possible so as to improve the mechanical strength of the assembly of magnets.

  • Using its vast expertise MAXIMA offers to provide consultancy to assembly manufactures to select the currect type and grade of the magnet which would be apt for their application.
  • MAXIMA associates across the continents support MAXIMA to procure, characterize and supply other type of magnets like ALNICO, sintered NdFeB, sintered SmCo, etc which are not manufactured at MAXIMA.
  • MAXIMA is currently procuring a lot of ALNICO and sintered NdFeB magnets from experienced and quality makers around the world to satisfy the demands of lot of customers in the country.

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