Ferrite Magnet

Ferrite magnets are permanent magnets made primarily from iron oxide combined with barium or strontium carbonate. They are one of the most widely used types of magnets due to their low cost, good resistance to demagnetization, and excellent corrosion resistance.

Key Features:
-Moderate magnetic strength compared to rare earth magnets (NdFeB, SmCo)
-Very cost-effective for mass production
-Excellent resistance to corrosion and oxidation (often used without coating)
-High electrical resistivity, reducing eddy current losses in motor applications
-Can operate at relatively high temperatures (up to ~250°C depending on grade)
- Require mold pressing during manufacturing; standard sizes typically have existing molds, and custom molds can be made for special orders
- Ferrite is a hard sintered ceramic material — economical and durable
- General tolerance is ±0.2%; precision grinding can be applied for special requirements
- Available in isotropic and anisotropic grades; before mold design, dimensions, shape, magnetic orientation, and intended application must be specified

Common Applications:
-Loudspeakers
-DC motors and generators
-Magnetic separators
-Household appliances
-Automotive sensors
-Toys and educational products

Coating Options:
Ferrite magnets are naturally corrosion-resistant, so they are often used without coating. However, coatings may be applied for mechanical protection or aesthetic purposes:

Epoxy coating: Adds mechanical strength and moisture resistance
Nickel plating: Provides a metallic finish for decorative or specialized uses
Rubber coating: Improves durability and handling in consumer products