Epoxy-bonded La-Fe-Co-Si magnetocaloric plates

Pulko, Barbara (author), Tušek, Jaka (author), Moore, James D. (author), Weise, Bruno (author), Skokov, Konstantin (author), Mityashkin, Oleg (author), Kitanovski, Andrej (author), Favero, Chiara (author), Fajfar, Peter (author), Gutfleisch, Oliver (author), Waske, Anja (author), Poredoš, Alojz (author)

We report the processing, analysis and testing of magnetocaloric composite materials consisting of La-Fe-Co-Si particles of various size fractions and a polymer matrix. All of the composites have working temperatures close to room temperature. The composites were pressed into thin plates, a geometry favorable for testing the composites in an active magnetic regenerator (AMR). In order to investigate the influence of particle size and binder type (epoxy), eight different epoxy-bonded La-Fe-Co-Si plates were made and analyzed. We found that the higher filling factor that can be achieved by using a mixture of several particle size fractions has beneficial influence on the thermal conductivity. Tests in the AMR revealed that a maximum temperature span of approximately T=10 K under magnetic field change of 0H=1.15 T can be obtained at no cooling load conditions. The stability of the measured T values and the mechanical integrity of sample after cyclic application of a magnetic field have been monitored for 90,000 cycles and showed no significant changes. We therefore conclude that epoxy-bonded La-Fe-Co-Si magnetocaloric composites have good magnetocaloric properties at low material-processing costs and hence represent a competitive way to produce magnetocaloric materials to be used in AMR.

• Language: English
• Keywords: magnetocaloric effect, magnetic refrigeration, La-Fe-Co-Si, active magnetic regenerator, epoxy
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2015
• Number of pages: Str. 65-73
• Numbering: Vol. 375
• PID: 20.500.12556/RUL-126300
• UDC: 621.565.8:697.97:620.1(045)
• ISSN on article: 0304-8853
• DOI: 10.1016/j.jmmm.2014.08.074
• COBISS.SI-ID: 13703963
• Publication date in RUL: 15.04.2021

Record is a part of a journal

• Title: Journal of magnetism and magnetic materials
• Shortened title: J. magn. magn. mater.
• Publisher: Elsevier
• ISSN: 0304-8853
• COBISS.SI-ID: 25758720

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
• Licensing start date: 15.04.2021

Secondary language

• Language: Slovenian
• Keywords: magnetokalorični efekt, procesiranje materialov, magnetokalorični material, magnetno hlajenje