Ceramic Magnets

Ceramic Magnets from Adams Magnetic Products

Versatile and economical, ceramic magnets (also known as hard ferrites) are often the first option considered when a magnetic solution is required due to their low cost.

Why Choose Adams?

Adams stocks a variety of ring magnets, disc magnets, rectangular magnets and block magnets in ceramic grades 1,5 & 8. Other configurations can be produced but are not stocked except for specific customer requirements. The standard sizes can be cut and ground to meet your specific requirements. We also produce stock and custom magnetic assemblies using ceramic magnets.

Common applications

• DC motors
• Magnetic separators
• Automotive sensors
• Craft projects
• Refrigerator magnets

Products Overview

Adams offers a wide selection of ceramic magnet products.

Click on your desired product type for product specifications.

Ceramic Ring Magnets

Ceramic Rings

Ceramic Disc Magnets

Ceramic Discs

Ceramic Rectangle Magnets

Ceramic Rectangle

Ceramic Block Magnets

Ceramic Blocks

Machining and tolerances

Ceramic magnets are very hard and brittle, consequently machining must be done with a diamond wheel, and is easier when done prior to magnetization. Standard tolerances for ceramic magnet dimensions are +/-.005" for ground dimensions and +/- 2% of feature size for as sintered dimensions. Because of their brittleness these magnets will not withstand impact or flexing. We recommend that they not be used for structural purposes. Ceramic magnets are chemically inert non-conductors, which is a benefit in many applications. However, this feature does eliminate the use of the EDM process to produce samples or special shapes.

Temperature constraints and methods of magnetization

Maximum operating temperature for a ceramic magnet is 250°C. Although you will experience magnetic losses when operating at elevated temperatures, the losses are recovered when the material is brought down to normal ambient temperature. However, operating in very cold temperatures (-20°C) can result in permanent losses of magnetic strength unless the circuit has been designed for such extremes.

Magnetization: ceramic magnets must be magnetized in the direction of orientation, which is the same as the direction of pressing.