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Last updateThu, 12 Aug 2021 11am

Back You are here: Inicio New materials Technological offers A greener technology for producing permanent strontium ferrite magnets with high coercive field

A greener technology for producing permanent strontium ferrite magnets with high coercive field

CSIC has developed a permanent magnet with high coercive field through a sintering process with hard magnetic ferrite particles and an organic solvent. This material can replace magnets based on rare earths in applications that require a high working temperature.

A strontium ferrite ceramics refined microstructure with increased magnetic properties.Permanent magnets are crucial materials as they allow storing, supplying and converting electrical energy into mechanical energy and vice versa. The most competitive magnets are based on rare earths, however the crisis associated with these elements has highlighted the importance of finding alternative magnets.

Advantages of a new technology for permanent magnets

A scientific team from the Institute of Ceramics and Glass (ICV-CSIC, by its Spanish acronym), leaded by researchers José Francisco Fernández Lozano and Adrián Quesada Michelena, has developed a permanent magnet based on ferrite and obtained through a sintering process, in which magnetic particles are compacted by an organic solvent. The mixing process is simple and inexpensive.

This technology allows manufacturing ferrite sintered magnets using temperatures around 10% lower than usual, and it leads to an energy saving of approximately 7 billion kilowatt-hour.

Main applications

The main applications for these new permanent magnets can be found within the sector of generation and storage of renewable energies (for instance, wind turbines and flywheels) and in the automotive sector, by using magnets for alternators and motors for electric or hybrid vehicles. The newly developed product can replace rare earth magnets in many applications that require a high working temperature.

The license for this patent is currently being offered.

 

For more information please contact:

Marisa Carrascoso Arranz

Deputy Vice-Presidency for Knowledge Transfer

Spanish National Research Council (CSIC)

 Tel.: (+34) 91 568 15 33 

 This email address is being protected from spambots. You need JavaScript enabled to view it.