Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La1-xPrxFe11.4Si1.6Hy hydrides

doi:10.1088/1674-1056/26/6/067502

中国物理B ›› 2017, Vol. 26 ›› Issue (6): 67502-067502.doi: 10.1088/1674-1056/26/6/067502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides

Lei Xu(许磊), Jin-Liang Zhao(赵金良), Jing-Jie Yang(杨静洁), Hong-Guo Zhang(张红国), Dan-Min Liu(刘丹敏), Ming Yue(岳明), Yi-Jian Jang(蒋毅坚)

1 College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;
2 College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;
3 Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China;
4 Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China

收稿日期:2016-11-16 修回日期:2017-03-14 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: Jin-Liang Zhao, Ming Yue E-mail:zhaojingliang@bjut.edu.cn;yueming@bjut.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51301008 and 51171003) and the Beijing Natural Science Foundation, China (Grant No. 1112005).

Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides

Lei Xu(许磊)^1,2, Jin-Liang Zhao(赵金良)², Jing-Jie Yang(杨静洁)², Hong-Guo Zhang(张红国)¹, Dan-Min Liu(刘丹敏)³, Ming Yue(岳明)¹, Yi-Jian Jang(蒋毅坚)⁴

1 College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;
2 College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;
3 Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China;
4 Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China

Received:2016-11-16 Revised:2017-03-14 Online:2017-06-05 Published:2017-06-05
Contact: Jin-Liang Zhao, Ming Yue E-mail:zhaojingliang@bjut.edu.cn;yueming@bjut.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51301008 and 51171003) and the Beijing Natural Science Foundation, China (Grant No. 1112005).

摘要/Abstract

摘要： In this paper, we study the effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides. The powder x-ray diffraction patterns of the La_1-xPr_xFe_11.4Si_1.6 and its hydrides show that each of the alloys is crystallized into the single phase of cubic NaZn₁₃-type structure. There are hydrogen-absorbing plateaus under 0.4938 MPa and 0.4882 MPa in the absorbing curves for the La_0.8Pr_0.2Fe_11.4Si_1.6 and La_0.6Pr_0.4Fe_11.4Si_1.6 compounds. The releasing processes lag behind the absorbing process, which is obviously different from the coincidence between absorbing and releasing curves of the LaFe_11.4Si_1.6 compound. The remnant hydrogen content for La_0.6Pr_0.4Fe_11.4Si_1.6 is significantly more than that for La_0.8Pr_0.2Fe_11.4Si_1.6 after hydrogen desorption, indicating that more substitutions of Pr for La are beneficial to retaining more hydrogen atoms in the alloys. The values of maximum magnetic entropy change are 14.91 J/kg·K and 17.995 J/kg·K for La_0.8Pr_0.2Fe_11.4Si_1.6H_0.13 and La_0.6Pr_0.4Fe_11.4Si_1.6H_0.87, respectively.

关键词: La (Fe, Si)₁₃ compounds, hydrogenating process, magnetocaloric effect, magnetic refrigeration materials

Abstract: In this paper, we study the effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides. The powder x-ray diffraction patterns of the La_1-xPr_xFe_11.4Si_1.6 and its hydrides show that each of the alloys is crystallized into the single phase of cubic NaZn₁₃-type structure. There are hydrogen-absorbing plateaus under 0.4938 MPa and 0.4882 MPa in the absorbing curves for the La_0.8Pr_0.2Fe_11.4Si_1.6 and La_0.6Pr_0.4Fe_11.4Si_1.6 compounds. The releasing processes lag behind the absorbing process, which is obviously different from the coincidence between absorbing and releasing curves of the LaFe_11.4Si_1.6 compound. The remnant hydrogen content for La_0.6Pr_0.4Fe_11.4Si_1.6 is significantly more than that for La_0.8Pr_0.2Fe_11.4Si_1.6 after hydrogen desorption, indicating that more substitutions of Pr for La are beneficial to retaining more hydrogen atoms in the alloys. The values of maximum magnetic entropy change are 14.91 J/kg·K and 17.995 J/kg·K for La_0.8Pr_0.2Fe_11.4Si_1.6H_0.13 and La_0.6Pr_0.4Fe_11.4Si_1.6H_0.87, respectively.

Key words: La (Fe, Si)₁₃ compounds, hydrogenating process, magnetocaloric effect, magnetic refrigeration materials

中图分类号: (Magnetocaloric effect, magnetic cooling)

75.30.Sg

75.50.-y (Studies of specific magnetic materials)

许磊, 赵金良, 杨静洁, 张红国, 刘丹敏, 岳明, 蒋毅坚. Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides[J]. 中国物理B, 2017, 26(6): 67502-067502.

Lei Xu(许磊), Jin-Liang Zhao(赵金良), Jing-Jie Yang(杨静洁), Hong-Guo Zhang(张红国), Dan-Min Liu(刘丹敏), Ming Yue(岳明), Yi-Jian Jang(蒋毅坚). Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides[J]. Chin. Phys. B, 2017, 26(6): 67502-067502.

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Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides

Effects of Pr substitution on the hydrogenating process and magnetocaloric properties of La_1-xPr_xFe_11.4Si_1.6H_y hydrides

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