Know about Ferrite magnets manufacturing process

Ferrite magnets manufacturing Process

In the 1960s, ferrite magnets (also known as Ceramic magnets) were developed as a low-cost
alternative to metallic magnets. Iron oxide and strontium carbonate make up their composition. Ferrite
magnets have gained widespread appeal due to their corrosion and demagnetization resistance, as well
as their inexpensive price per pound, despite their hard, brittle nature and low energy. Ferrite accounts
for more than 75% of global magnet use (by weight). For most types of DC motors, magnetic
separators, magnetic resonance imaging, and automotive sensors, it is the preferred choice.
Ferrite magnets are used in countless applications. Ferrite magnetics, on the other hand, aren't usually
made up of solid blocks of raw iron. Rather, they require manufacturing. Keep reading to learn more
about the Ferrite manufacturing process,
Manufacturing Process
Powder technology procedures are used to make Ferrite magnets. Iron oxide and strontium carbonate
are used to make the primary raw material ferrite. These materials are combined and heated to
temperatures between 1800 and 2000 degrees Fahrenheit. They undergo a chemical reaction at this
temperature, and the final material is ferrite.
Injection Molding
Many Ferrite magnets are made using injection molding, despite the fact that there are other methods.
Injection molding is a molding technique that involves injecting a material into a mold cavity, such as
ferromagnetic powder. Plastic injection molding follows the same basic steps. A machine that injects a
material into a hollow mold is connected to it. A ferromagnetic substance is injected into the mold
cavity in the case of Ferrite magnets.
The following are some of the advantages of injection molding for Ferrite magnets:

• Complex shapes are supported.

• Tight tolerances are available.
• Assists in the creation of a smooth surface.
• It's possible to mass-produce it.

Pressing
Some Ferrite magnets are made via pressing rather than injection molding. The same ferromagnetic
substance is used in pressing as it is in injection molding. The ferromagnetic material is "pressed" into
the mould cavity rather than being injected into it. For Ferrite magnets, there are two basic pressing
techniques: wet and dry. Wet pressing entails using a damp or wet ferromagnetic material, whereas dry
pressing requires using a dry ferromatnetic material.
Sintering and pressing are usually done at the same time. Sintering, also known as frittage, is a fusing
process that uses either heat or pressure. When heat or pressure is applied to certain materials,
including ferromagnetic ones, they fuse together. Often, Ferrite magnets are made by pressing and then
sintering their respective ferromagnetic materials. Sintering is the process of fusing ferromagnetic
materials together to form a solid object.
The following are some of the advantages of pressing for Ferrite magnets:

• Allows the manufacture of high-quality Ferrite magnets.
• Custom shapes and sizes are supported.
• Magnetic characteristics superior than injection molding
In Conclusion
Injection molding or pressing are the most common methods of producing Ferrite magnets. Injection
molding is a more simple procedure in which a ferromagnetic substance is injected into a mould cavity.
Pressing, on the other hand, is a manufacturing method that involves pressing a ferromagnetic material
into a mould cavity and then sintering it together.
Cosmo Ferrites Limited is well-versed in the use of toroidal core transformers and other Soft ferrite
products to help reduce high-frequency electronic noise, and they are available for consultation at any
time during the testing process.

If you are looking for E Core, ER Core, and Toroidal cores for your transformer or Application, you
will want to source them from a well-established and ISO 9001 certified manufacturer. Cosmo Ferrites
Limited has been manufacturing quality Soft Ferrites of various types for many years. The company
can provide you soft ferrites core in various sizes to help you meet your application requirements.