Skokov, K. P. ; Karpenkov, D. Yu. ; Kuz'min, M. D. ; Radulov, I. A. ; Gottschall, T. ; Kaeswurm, B. ; Fries, M. ; Gutfleisch, O. (2014)
Heat exchangers made of polymer-bonded La(Fe,Si)13.
In: Journal of Applied Physics, 115 (17)
doi: 10.1063/1.4868707
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report on magnetocaloric properties of polymer-bonded La(Fe,Si)13 heat exchangers with respect to the grain size of the powder used and the pressure applied for compaction of plates. Quite remarkably, it was found that the values of the adiabatic temperature change of polymer-bonded plates are 10% higher than in the initial bulk material. A critical value of the pressure applied during the compaction was found. Exceeding this value leads to a drastic reduction of the magnetocaloric effect due to cracking and comminution of the initial 50–100 μm grains down to 1–10 μm fragments. Compacting the LaFe11.6Si1.4 powder with 5 wt. % of silver epoxy under an optimal pressure of 0.1 GPa resulted in the production of 0.6 mm-thick plates. These plates were subsequently stacked and glued together into a simple porous heat exchanger with straight 0.6 mm-width channels.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Skokov, K. P. ; Karpenkov, D. Yu. ; Kuz'min, M. D. ; Radulov, I. A. ; Gottschall, T. ; Kaeswurm, B. ; Fries, M. ; Gutfleisch, O. |
| Art des Eintrags: | Bibliographie |
| Titel: | Heat exchangers made of polymer-bonded La(Fe,Si)13 |
| Sprache: | Englisch |
| Publikationsjahr: | 2014 |
| Verlag: | AIP Publishing LLC |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 115 |
| (Heft-)Nummer: | 17 |
| DOI: | 10.1063/1.4868707 |
| Kurzbeschreibung (Abstract): | We report on magnetocaloric properties of polymer-bonded La(Fe,Si)13 heat exchangers with respect to the grain size of the powder used and the pressure applied for compaction of plates. Quite remarkably, it was found that the values of the adiabatic temperature change of polymer-bonded plates are 10% higher than in the initial bulk material. A critical value of the pressure applied during the compaction was found. Exceeding this value leads to a drastic reduction of the magnetocaloric effect due to cracking and comminution of the initial 50–100 μm grains down to 1–10 μm fragments. Compacting the LaFe11.6Si1.4 powder with 5 wt. % of silver epoxy under an optimal pressure of 0.1 GPa resulted in the production of 0.6 mm-thick plates. These plates were subsequently stacked and glued together into a simple porous heat exchanger with straight 0.6 mm-width channels. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 31 Mär 2014 07:37 |
| Letzte Änderung: | 31 Mär 2014 07:37 |
| PPN: | |
| Sponsoren: | The research leading to these results has been partially funded by from the European Community's 7th Framework Program under the grant agreement No. 310748 (DRREAM). , We also gratefully acknowledge financial support from the German Federal Ministry of Education and Research under the VIP Project No. 03V0540 (MagKal). |
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