Influence of particle size on the hydrogenation in La(Fe, Si)13 compounds

H. Zhang; Y. Long; E. Niu; X. P. Shao; J. Shen; F. X. Hu; J. R. Sun; B. G. Shen

doi:10.1063/1.4794975

Influence of particle size on the hydrogenation in La(Fe, Si)₁₃ compounds

H. Zhang^*, Y. Long, E. Niu, X. P. Shao, J. Shen, F. X. Hu, J. R. Sun, B. G. Shen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

The influence of particle size on the hydrogenation of La(Fe, Si) ₁₃ compounds is studied in detail. The average T_C increases largely from 240 K to 308.5 K due to the enhancement of surface area by reducing the particle size. Besides, it is found that small particle size and narrow size range would improve the homogeneity of hydrogen distribution. The magnetic entropy change (ΔS_M) decreases slightly after hydrogenation, but the maximum value of -ΔS_M of small LaFe _11.7Si_1.3C_0.2H_x still remains a relatively large value of 14.4 J/kg K for a low magnetic field change of 2 T. It is also noted that the hydrogen-saturated LaFe_11.7Si _1.3C_0.2H_1.7 exhibits a great stability under a high pressure of 1.36 GPa, and this result is favorable to the further processing and applications of La(Fe, Si)₁₃ compounds.

Original language	English
Article number	17A911
Journal	Journal of Applied Physics
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.4794975
Publication status	Published - 7 May 2013
Externally published	Yes

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Zhang, H., Long, Y., Niu, E., Shao, X. P., Shen, J., Hu, F. X., Sun, J. R., & Shen, B. G. (2013). Influence of particle size on the hydrogenation in La(Fe, Si)₁₃ compounds. Journal of Applied Physics, 113(17), Article 17A911. https://doi.org/10.1063/1.4794975

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abstract = "The influence of particle size on the hydrogenation of La(Fe, Si) 13 compounds is studied in detail. The average TC increases largely from 240 K to 308.5 K due to the enhancement of surface area by reducing the particle size. Besides, it is found that small particle size and narrow size range would improve the homogeneity of hydrogen distribution. The magnetic entropy change (ΔSM) decreases slightly after hydrogenation, but the maximum value of -ΔSM of small LaFe 11.7Si1.3C0.2Hx still remains a relatively large value of 14.4 J/kg K for a low magnetic field change of 2 T. It is also noted that the hydrogen-saturated LaFe11.7Si 1.3C0.2H1.7 exhibits a great stability under a high pressure of 1.36 GPa, and this result is favorable to the further processing and applications of La(Fe, Si)13 compounds.",

author = "H. Zhang and Y. Long and E. Niu and Shao, {X. P.} and J. Shen and Hu, {F. X.} and Sun, {J. R.} and Shen, {B. G.}",

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AU - Zhang, H.

AU - Long, Y.

AU - Niu, E.

AU - Shao, X. P.

AU - Shen, J.

AU - Hu, F. X.

AU - Sun, J. R.

AU - Shen, B. G.

PY - 2013/5/7

Y1 - 2013/5/7

N2 - The influence of particle size on the hydrogenation of La(Fe, Si) 13 compounds is studied in detail. The average TC increases largely from 240 K to 308.5 K due to the enhancement of surface area by reducing the particle size. Besides, it is found that small particle size and narrow size range would improve the homogeneity of hydrogen distribution. The magnetic entropy change (ΔSM) decreases slightly after hydrogenation, but the maximum value of -ΔSM of small LaFe 11.7Si1.3C0.2Hx still remains a relatively large value of 14.4 J/kg K for a low magnetic field change of 2 T. It is also noted that the hydrogen-saturated LaFe11.7Si 1.3C0.2H1.7 exhibits a great stability under a high pressure of 1.36 GPa, and this result is favorable to the further processing and applications of La(Fe, Si)13 compounds.

AB - The influence of particle size on the hydrogenation of La(Fe, Si) 13 compounds is studied in detail. The average TC increases largely from 240 K to 308.5 K due to the enhancement of surface area by reducing the particle size. Besides, it is found that small particle size and narrow size range would improve the homogeneity of hydrogen distribution. The magnetic entropy change (ΔSM) decreases slightly after hydrogenation, but the maximum value of -ΔSM of small LaFe 11.7Si1.3C0.2Hx still remains a relatively large value of 14.4 J/kg K for a low magnetic field change of 2 T. It is also noted that the hydrogen-saturated LaFe11.7Si 1.3C0.2H1.7 exhibits a great stability under a high pressure of 1.36 GPa, and this result is favorable to the further processing and applications of La(Fe, Si)13 compounds.

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Influence of particle size on the hydrogenation in La(Fe, Si)₁₃ compounds

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