Ferrite ring magnets for Speakers

Ceramic ring magnets can operate in higher temperature applications where a strong magnetic field is not needed. Ceramic is low cost, but the lower magnetic field produced by ceramic / ferrite magnets requires a larger size to get the field required.

Ceramic ring magnets are a dark charcoal gray in color and do not appear metallic.

Ceramic magnets are not suited for high-temperature applications (over 250° C)

Ferrite ring magnets are great for use in many applications, which include use as motor magnets, sensor magnets, hobby magnets, craft magnets, consumer electronics magnets, and speaker magnets.

Features:

Dimensions: OD220.00 x ID110.00 x 20.00mm Thickness

Tolerances: +/-0.1mm

Material: Ferrite Ceramic C8

Plating/Coating: N/A

Magnetization Direction: Axially (Poles on the Flate Faces)

Inexpensive yet strong; a good balance between strength and affordability.

Does not demagnetize easily.

Can be magnetized with multiple poles if necessary.

Does not rust.

Key Challenges Of Ceramic Magnet Material

Hard and brittle.

Properties degrade linearly with temperature. At 350°F (177°C), about 75% of room temperature magnetization is retained, and at 550°F (288°C), about 50% is retained.

Application：

- Speaker Magnets

- DC brushless motors

- Magnetic Resonance Imaging (MRI)

- Magnetos used on lawnmowers and outboard motors

- DC permanent magnet motors (used in cars)

- Separators (separate ferrous material from non-ferrous)

- Used in magnetic assemblies designed for lifting, holding, retrieving and separating