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source:eurekalertResearchers from the Department of Energy’s Critical Materials Institute (CMI) and Ames National Laboratory have improved the properties of a rare-earth-free permanent magnet material and demonstrated the process can be upscaled for manufacturing. The researchers developed a new method of manufacturing manganese bismuth (MnBi) magnets based on microstructure engineering. This process is a step towards making compact, energy-efficient motors without the use of rare earths.High-power permanent magnets are increasingly important for a variety of renewable energy technologies, inc...
Release time: 2022 - 11 - 09
source:phys.orgA team of researchers at the MPQ has pioneered the integration of erbium atoms with special optical properties into a silicon crystal. The atoms can thus be connected by light at a wavelength that is commonly used in telecommunications. This makes them ideal building blocks for future quantum networks that enable calculations with several quantum computers, as well as the secure exchange of data in a quantum internet. Since the new experimental results were achieved without sophisticated cooling and are based on established methods of semiconductor production, the method appears...
Release time: 2022 - 11 - 08
Facile and cost-effective technique to control europium oxidation states in glassy fluorophosphate matrices with tunable photoluminescence source:natureAbstractInorganic fluorophosphate glasses doped with Eu2+/Eu3+ are potential candidates for phosphors for commercial white LEDs. This report presents a fast, inexpensive and effective method of controlling the relative concentrations of Eu2+/Eu3+ photoluminescent centers in these glasses. The technique consists of a fast quenching of the melt of initial reagents under appropriate conditions. Eu2+/Eu3+ ratio was controlled by carrying out t...
Release time: 2022 - 11 - 07
source:arstechnicaA variety of modern technologies, including permanent magnets that have been used in everything from earbuds to wind turbines, rely on rare earth elements. While the metals aren't actually especially rare, they don't occur at high concentrations in the Earth's crust. As such, extracting them is expensive and tends to produce a lot of environmental damage, meaning that most of the supply comes from a small number of countries (see the chart here), leaving the supply at risk of political fights.So the potential to get much more out of existing rare earth mines is ob...
Release time: 2022 - 11 - 04
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