| Title | Toyota's New Magnet Won't Depend on Some Key Rare-Earth Minerals | |
| Date | Thursday March 01 2018, @09:48AM | |
| Author | martyb | |
| Topic | ||
| from the Very-attractive-idea dept. | ||
Toyota says it has invented a new magnet for high-energy applications like electric motors that uses a fraction of the amount of neodymium (a rare-earth element) of a standard iron, boron, neodymium (NdFeB) magnet.
Rare-earth magnets are used in many hybrid vehicles, some all-electric vehicles, and in other applications like wind turbines and robotics.
Although "rare" is a bit of a misnomer for a material like neodymium (high demand has led to relatively high production volumes), Toyota notes that "there are concerns that shortages will develop as electrified vehicles, including hybrid and battery electric vehicles, become increasingly popular in the future." That concern is compounded by the concentration of rare-earth mining: although attempts have been made to mine rare-earth metals in the US [Ed note: paywalled] and other parts of the world, a preponderance of rare-earth mining occurs in China. That country threatened to stop exporting neodymium and other rare earths in 2011, which sent prices for the metals soaring. If China were to use rare-earth access as a geopolitical tool again, it could significantly impact companies like Toyota that depend on rare earths to build flagship products like the Prius.
The new magnet Toyota developed also uses no terbium or dysprosium, which can be added to neodymium to improve its operability at high heat, above 100 degrees Celsius (212 degrees Fahrenheit). (In fact, mining consultancy Roskill notes that few automakers use terbium in magnets anymore, though dysprosium is still commonly added to magnets with neodymium.)
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printed from SoylentNews, Toyota's New Magnet Won't Depend on Some Key Rare-Earth Minerals on 2023-06-18 08:28:05