Specialists at NUST MISIS are working on creating a new magnet that, in some cases, can replace analogs containing rare earth elements.
The research group is investigating materials based on barium and strontium ferrites, which can be used to create permanent magnets. Scientists synthesized BaFe₁₂O₁₉ powder with a particle size of less than 0.5 micrometers. Tests have shown that this material has a high coercive force — a key characteristic that determines the magnet's resistance to demagnetization.
We obtained a coercive force of 5.6 kOe, while commercial magnets based on barium or strontium ferrites have a coercive force of about 3 kOe. That is, our material is almost twice as resistant to remagnetization
Currently, rare earth elements, such as lanthanum, are added to ferrites to increase the coercive force. The new material will reduce dependence on them, which can reduce the cost of magnet production and reduce the use of scarce metals.
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