Fine control of Curie temperature of magnetocaloric alloys La(Fe,Co,Si)13 using electrolytic hydriding
Fine control of Curie temperature of magnetocaloric alloys La(Fe,Co,Si)13 using electrolytic hydriding
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DOI：
10.1016/j.scriptamat.2019.08.017
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发表时间：
2020-01
影响因子：
6
通讯作者：
Liya Guo;E. Lovell;Q. Tang;D. Boldrin;C. Tang;S. Day;L. Cohen;M. Ryan
中科院分区：
文献类型：
--
作者：
Liya Guo;E. Lovell;Q. Tang;D. Boldrin;C. Tang;S. Day;L. Cohen;M. Ryan
这项工作展示了精确控制La（Fe，Co，Si）13Hδ中的氢含量，以开发环境友好的基于磁热的冷却技术，使用电解冷却技术。我们表明居里温度，一个关键的参数，直接决定了有效冷却的温度窗口，可以很容易地和可重复地改变在1 K的步骤范围内274 K至402 K。重要的是，部分（高达10%）和完全包覆的组合物都保持了与基础组合物相当的有利的熵变值。重要的是，我们发现在这些二级相变化合物中，部分包结是稳定的，并且不容易发生相分离。
This work demonstrates precision control of hydrogen content in La(Fe,Co,Si)13Hδfor the development of environmentally friendly magnetocaloric-based cooling technologies, using an electrolytic hydriding technique. We show the Curie temperature, a critical parameter which directly governs the temperature window of effective cooling, can be varied easily and reproducibly in 1 K steps within the range 274 K to 402 K. Importantly, both partially (up to 10%) and fully hydrided compositions retain favorable entropy change values comparable to that of the base composition. Crucially, we show in these second-order phase transition compounds, partial hydriding is stable and not susceptible against phase separation.