Influence of manganite powder grain size and Ag-particle coating on the magnetocaloric effect and the active magnetic regenerator performance
Source abstract
Abstract
Abstract The magnetocaloric performance of La 0.67 Ca 0.27 Sr 0.06 Mn 1.05 O 3 is investigated as a function of the powder grain size and also as a function of decoration of grains with highly conductive silver particulates as a coating layer. We demonstrate that the thermal and electrical conductivities can be significantly modified by the Ag-particle coating when the material is examined in sintered pellet form and we compare results with a second manganite composition La 0.67 Ca 0.33 MnO 3 with significantly smaller grain size. However, we find that this microstructural engineering does not improve the performance of the active magnetic regenerator cycle using the silver decorated material in powder form. The regenerator performance is improved by the reduction of the powder grain size of the refrigerant which we attribute to improved thermal management due to increased surface to volume ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Magnetic heat pumping near room temperature10.1063/1.323176 ↗
2. Thirty years of near room temperature magnetic cooling: where we are today and future prospects10.1016/j.ijrefrig.2008.01.004 ↗
3. Magnetic refrigeration at room temperature – from magnetocaloric materials to a prototype10.1088/1742-6596/303/1/012082 ↗
4. Magnetocaloric materials: the search for new systems10.1016/j.scriptamat.2012.02.045 ↗
5. Developments in magnetocaloric refrigeration10.1088/0022-3727/38/23/R01 ↗
6. The magnetocaloric effect and its applications10.1016/S1369-7021(03)01134-9 ↗
7. Hysteresis and magnetocaloric effect at the magnetostructural phase transition of Ni–Mn–Ga and Ni–Mn–Co–Sn Heusler alloys10.1103/PhysRevB.85.014430 ↗
8. Corrosion behavior of magnetic refrigeration material La–Fe–Co–Si in distilled water10.1016/j.jallcom.2010.12.122 ↗
9. Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3±δ10.1016/j.scriptamat.2012.11.036 ↗
10. The influence of the solid thermal conductivity on active magnetic regenerator10.1088/0022-3727/45/14/145001 ↗
11. Reducing extrinsic hysteresis in first-order La(Fe Co, Si)13 magnetocaloric systems10.1063/1.3276565 ↗
12. Connection between hysteresis and thermal relaxation in magnetic materials10.1103/PhysRevB.61.1278 ↗
13. Thermodynamic aspects of first-order phase transformations with hysteresis in magnetic materials10.1016/j.jmmm.2007.03.177 ↗
14. Electrolytic hydriding of LaFe13−xSix alloys for energy efficient magnetic cooling10.1002/adma.201200112 ↗
15. Novel composite cermet for low-metal-content oxygen separation membranes10.1021/cm501490n ↗
16. Thermal and electronic transport in La0.7Sr0.3−xAgxMnO3 compounds between 50 and 450 K10.1016/j.physb.2005.11.001 ↗
17. Thermal conductivity of silver doped lanthanum manganites between 10 and 300 K10.1016/j.jpcs.2004.06.014 ↗
18. Structural, magnetic and transport study of monovalent Na-doped manganite Pr0.55Na0.05Sr0.4MnO310.1016/j.jallcom.2013.01.008 ↗
19. Local lattice distortions and thermal transport in perovskite manganites10.1103/PhysRevB.56.R8495 ↗
20. Thermal conductivity of manganite perovskites: colossal magnetoresistance as a lattice-dynamics transition10.1103/PhysRevLett.78.3947 ↗
21. Thermal transport properties of magnetic refrigerants La(FexSi1−x)13 and their hydrides, and Gd5Si2Ge2 and MnAs10.1063/1.1643774 ↗
22. Magnetic, transport and thermodynamic properties of Ce5Ni2Si3 compound10.1016/j.solidstatesciences.2012.08.022 ↗
23. Thermal property of magnetic materials for hydrogen magnetic refrigeration and effect of magnetic field on them10.1109/TASC.2004.831058 ↗
24. Recent developments in magnetocaloric materials10.1088/0034-4885/68/6/R04 ↗
25. Direct and indirect measurement of the magnetocaloric effect in La0.67Ca0.33−xSr×MnO3 (x∊[0;0.33])10.1088/0953-8984/17/39/011 ↗
26. High performance magnetocaloric perovskites for magnetic refrigeration10.1063/1.3695338 ↗
27. A versatile magnetic refrigeration test device10.1063/1.2981692 ↗
28. Functionally graded ceramics fabricated with side-by-side tape casting for use in magnetic refrigeration
29. On the manufacture of silver-BaCe0.5Zr0.3Y0.16Zn0.04O3−d composites for hydrogen separation10.1016/j.ijhydene.2015.01.146 ↗
30. Structural deformation, melting point and lattice parameter studies of size selected silver cluster10.1140/epjd/e2005-00319-x ↗
31. Kitanovski · 2015