We are one of the enterprises specializing in
manufacturing ceramic magnets in china. The quality
and characteristics of our ceramic ferrite
magnet products have being fit for the standard of Y30BH, Y35,
which are equal to C7, C8A, C8B, C9~C12 in MMPA, the American
We are good at manufacturing super-large, super-hin and big radian
segment permanent ferrite magnet, with good magnetic property and
quality which equal to international advanced counterparts's, its
products are marketable and popular.
Ceramic magnets are sintered permanent magnets composed of Barium
or Strontium Ferrite. This class of magnets, aside from good
resistance to demagnetization, has the popular advantage of low
Ceramic magnets are very hard and brittle, and require
specialized machining techniques. Moreover, they should be machined
in an unmagnetized state. We are equipped to machine these
materials to specifications.
Anisotropic grades are oriented in the manufacturing direction, and
must be magnetized in the direction of orientation. Isotropic
grades are not oriented and can be magnetized in any direction,
although some degree of greater magnetic strength will be found in
the pressing dimension, usually the shortest dimension.
Due to their low cost, Ceramic ferrite magnets enjoy a very wide
range of applications, from motors and loudspeakers to toys and
crafts, and are the most widely used permanent magnets today.
Pressing and sintering involves pressing very fine ferrite powder
in a die, and then sintering this pressed magnet. All fully dense
Ferrite magnets are produced this way. Ferrite ceramic magnets can
be wet pressed or dry pressed. Wet pressing yields better magnetic
properties, but poorer physical tolerances. Generally, the powder
is dry for grade 1 or 5 materials, and wet for grade 8 and higher
materials. Sintering involves subjecting the material to high
temperatures to fuse the pressed powder together, thus creating a
solid material. Magnets produced through this process usually need
to have some finish machining, otherwise surface finishes and
tolerances are not acceptable. Some manufacturers extrude instead
of press wet powder slurry and then sinter the material. This is
sometimes done for arc segment shapes, where the arc cross-section
is extruded in long lengths, sintered, and then cut to length.
Injection Molding: Ferrite powder is mixed into a compound and then
injection molded in the same way as plastic.
Tooling for this manufacturing process is usually very costly.
However, parts produced through this process can have very
intricate shapes and tight tolerances. Injection molded ferrite
properties are either lower or about the same as grade 1 Ferrite.
For more detail info, please feel free to visit our website or
inquire us at any of your convenience.