Microstructural control and tuning of thermal conductivity in La0.67Ca0.33MnO3±δ

SCRIPTA MATERIALIA

卷:68

Article

Turcaud, J. A.¹  Morrison, K.¹  Berenov, A.²  Alford, N. McN.²  Sandeman, K. G.¹  Cohen, L. F.¹ 

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2AZ, England

[2] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England

关键词: Magnetocalorics;    Thermal conductivity;    Manganites;    Magnetic refrigeration;    Silver;   

DOI  :  10.1016/j.scriptamat.2012.11.036

来源: Elsevier

【 摘 要 】

Manganites are one of only a small number of material families currently being trialled as room-temperature magnetic refrigerants. Here we examine the dependence of the thermal conductivity, kappa, of La0.67Ca0.33MnO3 +/-delta as a function of density, grain size and silver impregnation around room temperature. We use a simple effective medium model to extract relevant trends in the data and demonstrate a 3-fold increase in thermal conductivity by silver impregnation. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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