SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Magnetic Materials for Efficient Energy Conversion
MA 3.5: Vortrag
Montag, 27. März 2023, 10:30–10:45, HSZ 401
Shaping and functionalizing of Gd for a magnetocaloric cooling application — •Lukas Beyer1,2, Bruno Weise1, Julia Kristin Hufenbach1,2, and Jens Freudenberger1,2 — 1Leibniz IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069, Dresden, Germany — 2TU Bergakademie Freiberg, Institute of Materials Science, Gustav-Zeuner-Str. 5, 09599, Freiberg, Germany
Magnetic refrigeration based on the magnetocaloric effect aims to substitute conventional cooling solutions, still, shaping and use of magnetocaloric materials remains challenging [1]. A combination with so-called thermal switches could improve the heat transport resulting in higher operating frequencies and therefore, an increase in the power density of magnetic cooling [2]. This could be beneficial for battery thermal management systems [3]. In this work we studied the influence of mechanical deformation on Gd while producing Gd-substrates that could be combined with fast thermal switches by ElectroWetting On Dielectric. We prepared Gd-substrates via cold-rolling and strip casting and investigated these in regards of sufficient surface quality and substrate dimensions. Heat treatments have been performed to restore the magnetocaloric effect after deformation. By means of magnetic and heat-capacity measurements we calculated the isothermal entropy and adiabatic temperature change and proved the recovery of the magnetocaloric effect in Gd-substrates. [1] J. S. Brown, et al.;Appl. Therm. Eng. 64 (2014). [2] A. Kitanovski, et al.;Int.J. Refrig. 33 (2010). [3] J. Kim et al.;Appl. Therm. Eng. 149 (2019).