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Title: Study on the Hydrogenation Kinetics, Properties, and Stability of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} Compounds

Abstract

We have studied systematically the pressurecomposition-temperature (P-C-T) hydrogen absorption/release relation curves of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} compounds. The effects of pressure, composition, temperature, and time on the process of hydrogenating have been investigated. The results indicate that the volume of unit cell can be expanded after hydrogenating without changing the cubic NaZn{sub 13}-type crystal structure. The LaFe{sub 11.5}Si{sub 1.5}H{sub 1.6} and LaFe{sub 11.4}Si{sub 1.6}H{sub 0.5} compounds can be prepared separately under different hydrogen pressures at 423 K. The Curie temperature (T{sub C}) can be increased, the thermal hysteresis can be decreased, and the magnetic entropy change can be maintained at a high standard after hydrogenating in LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} compounds. With prolonged exposure time in air, the magnetic properties and magneto-caloric effect (MCE) can be maintained at a relatively ideal level, implying that the La(Fe, Si){sub 13} hydrides have a good time stability.

Authors:
 [1];  [2];  [1]
  1. Taiyuan University of Science and Technology, Heavy Machinery Engineering Research Center of Education Ministry (China)
  2. Taiyuan University of Science and Technology, School of Material Science and Engineering (China)
Publication Date:
OSTI Identifier:
22774112
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 2; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; AIR; CHEMICAL REACTION KINETICS; CRYSTAL STRUCTURE; CURIE POINT; DIAGRAMS; ENTROPY; HYDROGEN; HYDROGENATION; HYSTERESIS; LANTHANUM HYDRIDES; LANTHANUM SILICIDES; MAGNETIC PROPERTIES

Citation Formats

Zhao, Fei, Wu, Zhisheng, and Huang, Qingxue. Study on the Hydrogenation Kinetics, Properties, and Stability of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} Compounds. United States: N. p., 2018. Web. doi:10.1007/S10948-017-4232-0.
Zhao, Fei, Wu, Zhisheng, & Huang, Qingxue. Study on the Hydrogenation Kinetics, Properties, and Stability of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} Compounds. United States. doi:10.1007/S10948-017-4232-0.
Zhao, Fei, Wu, Zhisheng, and Huang, Qingxue. Thu . "Study on the Hydrogenation Kinetics, Properties, and Stability of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} Compounds". United States. doi:10.1007/S10948-017-4232-0.
@article{osti_22774112,
title = {Study on the Hydrogenation Kinetics, Properties, and Stability of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} Compounds},
author = {Zhao, Fei and Wu, Zhisheng and Huang, Qingxue},
abstractNote = {We have studied systematically the pressurecomposition-temperature (P-C-T) hydrogen absorption/release relation curves of LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} compounds. The effects of pressure, composition, temperature, and time on the process of hydrogenating have been investigated. The results indicate that the volume of unit cell can be expanded after hydrogenating without changing the cubic NaZn{sub 13}-type crystal structure. The LaFe{sub 11.5}Si{sub 1.5}H{sub 1.6} and LaFe{sub 11.4}Si{sub 1.6}H{sub 0.5} compounds can be prepared separately under different hydrogen pressures at 423 K. The Curie temperature (T{sub C}) can be increased, the thermal hysteresis can be decreased, and the magnetic entropy change can be maintained at a high standard after hydrogenating in LaFe{sub 11.5}Si{sub 1.5} and LaFe{sub 11.4}Si{sub 1.6} compounds. With prolonged exposure time in air, the magnetic properties and magneto-caloric effect (MCE) can be maintained at a relatively ideal level, implying that the La(Fe, Si){sub 13} hydrides have a good time stability.},
doi = {10.1007/S10948-017-4232-0},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 2,
volume = 31,
place = {United States},
year = {2018},
month = {2}
}