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A groundbreaking technique produces tetrataenite, a material used in permanent magnets only found in meteorites. source:advancedsciencenewsPermanent magnets are widely used in industry, playing a particularly important role in power generators and motors. The best magnets are made of rare-earth metals, but as their name suggests, these elements are not ubiquitous in nature.Moreover, mining them is not environmentally friendly, and there are also concerns over the security of the rare-earth supply chain, prompting researchers to look for alternatives. The most popular, so far, is an alloy ...
Release time: 2022 - 11 - 18
source:.lpi.usraMeteorites and asteroids fascinate planetary scientists because they represent the building blocks of the planets and offer unique insights into the earliest moments of our solar system. Meteorites can be identified as such due to unique chemical signatures, and some types (iron meteorites) show beautiful textures called Widmanstätten patterns, which could only form over millions of years. Moreover, these extraterrestrial materials are important for their potential as in-situ resources for space exploration and industrialization, with the most attention given to water (imp...
Release time: 2022 - 11 - 17
source:theswaddleLast month, two teams of scientists — from USA’s Northwestern University and UK’s Cambridge University — came up with methods to synthesize a material that doesn’t exist on Earth. The scientists devised their own methods to create tetrataenite — a complex iron and nickel alloy present exclusively in meteorites landing from outer space. In the long run, this development holds the potential to revolutionize green energy.A vital component of building renewable energy options is permanent magnets. Magnets and magnetic materials’ ability to generate electricity provides a cleaner, ...
Release time: 2022 - 11 - 16
source:natureAbstractWe investigated the random lasing process and Replica Symmetry Breaking (RSB) phenomenon in neodymium ions (Nd3+) doped lead-germanate glass–ceramics (GCs) containing MgO. Glass samples were fabricated by conventional melt-quenching technique and the GCs were obtained by carefully devitrifying the parent glasses at 830 °C for different time intervals. The partial crystallization of the parent glasses was verified by X-ray diffraction. Photoluminescence (PL) enhancement of ≈ 500% relative to the parent glasses was observed for samples with a higher crystallinity degree...
Release time: 2022 - 11 - 15
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