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High magnetic-refrigeration performance of plate-shaped La0.5Pr0.5Fe11.4Si1.6 hydrides sintered in high-pressure H-2 atmosphere
N. K.; Guo Sun, J.; Zhao, X. G.; Si, P. Z.; Huang, J. H.; Zhang, Z. D.
2015
Source PublicationApplied Physics Letters
ISSN0003-6951
Volume106Issue:9
AbstractLa(Fe,Si)(13) hydride is regarded as one of the most promising room-temperature refrigerants. However, to use the alloys in an active magnetic regenerator machine, it is vital to prepare thin refrigerants. In this work, a high H-2 gas pressure of 50 MPa was employed to suppress the desorption of hydrogen atoms during the sintering process of plate-shaped La0.5Pr0.5Fe11.4Si1.6 hydrides. At 330K, a high-density sintered thin plate shows a large magnetic-entropy change Delta S-m of 15.5 J/kg K (106 mJ/cm(3) K) for a field change of 2 T. The volumetric Delta S-m is almost twice as large as that of bonded La(Fe,Si)(13) hydrides. Favorably, hysteresis is almost absent due to the existence of micropores with a porosity of 0.69% which has been analyzed with high-resolution X-ray microtomography. (C) 2015 AIP Publishing LLC.
description.department[sun, n. k. ; guo, j.] shenyang ligong univ, sch sci, shenyang 110159, peoples r china. [zhao, x. g. ; zhang, z. d.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [si, p. z.] china jiliang univ, coll mat sci & engn, hangzhou 310018, zhejiang, peoples r china. [huang, j. h.] baotou res inst rare earths, baotou 014030, peoples r china. ; sun, nk (reprint author), shenyang ligong univ, sch sci, shenyang 110159, peoples r china. ; naikunsun@163.com ; xgzhao@imr.ac.cn
KeywordX-ray Tomography Alloys Regenerators Transition La(Fe
URL查看原文
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73924
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
N. K.,Guo Sun, J.,Zhao, X. G.,et al. High magnetic-refrigeration performance of plate-shaped La0.5Pr0.5Fe11.4Si1.6 hydrides sintered in high-pressure H-2 atmosphere[J]. Applied Physics Letters,2015,106(9).
APA N. K.,Guo Sun, J.,Zhao, X. G.,Si, P. Z.,Huang, J. H.,&Zhang, Z. D..(2015).High magnetic-refrigeration performance of plate-shaped La0.5Pr0.5Fe11.4Si1.6 hydrides sintered in high-pressure H-2 atmosphere.Applied Physics Letters,106(9).
MLA N. K.,et al."High magnetic-refrigeration performance of plate-shaped La0.5Pr0.5Fe11.4Si1.6 hydrides sintered in high-pressure H-2 atmosphere".Applied Physics Letters 106.9(2015).
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