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- Japan developed a strong magnet does not contain rare earth elements dysprosiumPublished??2012??08??20??
- Japan's Toshiba Corp., Tokyo, August 18, recently announced the development of an engine with high iron concentration of samarium cobalt magnet, this magnet is completely free of rare earth elements dysprosium, but the magnetic force stronger than the now widely used in heat-resistant Neodymium magnet.
Toshiba press release said heat-resistant Neodymium part replacement neodymium magnet neodymium, dysprosium to commonly used to act as the demanding automotive and railway rolling stock engine with a magnet on the heat resistance. The distribution of dysprosium in nature, concentrated in a very small part of the region, With raw material prices in recent years, people need a non-dysprosium but still has a strong magnetic force of the magnet in the environment for more than 100 degrees Celsius.
The newly developed high iron concentration of samarium cobalt magnets Toshiba independent research and development of heat treatment technology, so that the original magnetic than neodymium magnets, samarium cobalt magnets in the environment for more than 100 degrees Celsius with a strong magnetic force beyond the heat-resistant Neodymium magnet.
In order to increase the magnetic force, R & D personnel will be the weight of iron than the upgrade from the original 15% to 20-25%, and adjustment in the sintering temperature, time, pressure to achieve the best state, thereby reducing the increased oxidation of hindered magnetic material and other factors.
The communique says that the engine of the R & D magnet in the experiment to achieve equal performance with the use of heat-resistant Neodymium magnet the same size engine. The company plans to market in the 2012 annual weekend of this new magnet.
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