Possible forms

 

Segments, Cylinders, Blocks, Rings, Mouldings.

Ferrite magnets have won wide acceptance due to their strong resistance to demagnetization, corrosion resistance, and low price per unit, although they offer low energy compared to rare earth magnets. It is the most common magnet used in most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors.

 

We would like to highlight the following areas of application: 

- Auto industry

- Industry automation

- Microwave communication system

- Mobile communication device

- Sensor technology

- Headset device

- Medical

household appliance

- Attachment system

- Education

Description

 

Due to the manufacturing process and mechanical properties, hard ferrites are also referred to as ceramic magnets. For production, hard ferrite powder (iron oxide + Sr carbonate) is milled, pressed and then sintered. Cracks and edge fractures do not significantly affect the magnetic properties. In the attached table, we have listed the available dimensions according to our moulds.Special dimensions can be made depending on the geometry.For products outside the scope please contact us.

Ferrite Magnet

Possible forms

 

Segments, Rectangles, Cylinders, Blocks, Rings, Discs.

Magnetic properties

Our products can be isotropic and anisotropic, a predetermined magnetization direction.

Mechanical properties


Due to the hard and brittle nature, ceramic magnets are sensitive to impact and pressure loads. 

Chemical properties


Ceramic magnet consists predominantly of iron oxide. It offers good corrosion resistance and generally does not require a coating or plating. Additional corrosion protection is necessary only in exceptional cases (for example, salts, acids). On the surface, it can easily accumulate rust and hard ferrite powder. But it does not affect magnetic performance. Strontium Sr materials are to be preferred to Barium Ba materials (heavy metals) for environmental reasons.  

Operating Temperature

 

The maximum operating temperature for a ferrite 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 room 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.

 

Processing and machining


As described hard ferrite materials are sensitive, appropriate handling should be provided. Machining can be done by cutting or grinding.This should be done without heat development with diamond tools in the unmagnetized state.Hard ferrites are not electrically conductive

Possible magnetization pattern

 

Magnetization pattern can be standard, 2-pole, multipole or radial in all shapes. Isotropic ferrite grades can be magnetized in any direction, while anisotropic grades have a preferred direction of magnetization and will only meet their full magnetic potential when magnetized along the “easy axial”.

Lizhai, Dongyang City
Zhejiang Province
China 322105​

+86 135 67 52 68 90(China)

+45 23 66 92 28 (Europe)

©2018 by First Magnetics Co. Ltd