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7 results on '"Wortmann, Jonas"'

2. Utilizing the unique charge extraction properties of antimony tin oxide nanoparticles for efficient and stable organic photovoltaics

Author

Liu, Chao, Félix, Roberto, Forberich, Karen, Du, Xiaoyan, Heumüller, Thomas, Matt, Gebhard J., Gu, Ening, Wortmann, Jonas, Zhao, Yicheng, Cao, Yuanyuan, He, Yakun, Ying, Lei, Hauser, Alina, Oszajca, Marek F., Hartmeier, Benjamin, Rossier, Michael, Lüchinger, Norman A., Liu, Yi-Sheng, Guo, Jinghua, Nie, Kaiqi, Wilks, Regan G., Bachmann, Julien, Bär, Marcus, Li, Ning, and Brabec, Christoph J.

Published
2021
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7. Magnetic Refrigeration with Recycled Permanent Magnets and Free Rare‐Earth Magnetocaloric La–Fe–Si.

Author

Benke, Dimitri, Fries, Maximilian, Specht, Marius, Wortmann, Jonas, Pabst, Marc, Gottschall, Tino, Radulov, Iliya, Skokov, Konstantin, Bevan, Alex Ivor, Prosperi, Davide, Tudor, Catalina Oana, Afiuny, Peter, Zakotnik, Miha, and Gutfleisch, Oliver

Subjects
PERMANENT magnets, MAGNETIC cooling, MAGNETIC devices, MAGNETIC fields, ECOLOGICAL impact, RAW materials, RARE earth metals
Abstract

Magnetic refrigeration is an upcoming technology that could be an alternative to the more than 100‐year‐old conventional gas–vapor compression cooling. Magnetic refrigeration might answer some of the global challenges linked with the increasing demands for readily available cooling in almost every region of the world and the global‐warming potential of conventional refrigerants. Important issues to be solved are, for example, the required mass and the ecological footprint of the rare‐earth permanent magnets and the magnetocaloric material, which are key parts of the magnetic cooling device. The majority of existing demonstrators use Nd–Fe–B permanent magnets, which account for more than 50% of the ecological footprint, and Gd, which is a critical raw material. This work shows a solution to these problems by demonstrating the world's first magnetocaloric demonstrator that uses recycled Nd–Fe–B magnets as the magnetic field source, and, as a Gd replacement material, La–Fe–Mn–Si for the magnetocaloric heat exchanger. These solutions show that it is possible to reduce the ecological footprint of magnetic cooling devices and provides magnetic cooling as a green solid‐state technology that has the potential to satisfy the rapidly growing global demands. [ABSTRACT FROM AUTHOR]

Published
2020
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