中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4506-4510.doi: 10.1088/1674-1056/18/10/067

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Hydrogen absorption of LaFe11.5Si1.5 compound under low hydrogen gas pressure

陈仁杰1, 傅斌2, 龙毅2, 史普辑2, 马涛2, 鲍博2, 闫阿儒2   

  1. (1)Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; (2)School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2009-03-30 修回日期:2009-05-04 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No 2006CB601101), the National High Technology Research and Development Program of China (Grant No 2007AA03Z440), and the National Natural Science Foundation of China (Grant No 50731

Hydrogen absorption of LaFe11.5Si1.5 compound under low hydrogen gas pressure

Fu Bin(傅斌)a)†, Long Yi(龙毅)a), Shi Pu-Ji(史普辑)a), Ma Tao(马涛)a), Bao Bo(鲍博)a), Yan A-Ru(闫阿儒)b), and Chen Ren-Jie(陈仁杰)b)   

  1. a School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; b Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
  • Received:2009-03-30 Revised:2009-05-04 Online:2009-10-20 Published:2009-10-20
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No 2006CB601101), the National High Technology Research and Development Program of China (Grant No 2007AA03Z440), and the National Natural Science Foundation of China (Grant No 50731

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摘要： Hydrogen absorptions of LaFe11.5Si1.5 compound in 1-atm hydrogen gas at different temperatures are investigated. The hydrogen content in the hydrogenated sample does not increase with the increase of temperature of hydrogen absorption but changes complicatedly. The characteristic of first-order transition in LaFe11.5Si1.5 compound is weakened after hydrogen absorption. It leads the peaks of magnetic entropy to become wider and the hysteresis loss to reduce significantly, but relative cooling power (RCP) is not changed considerably.

Abstract: Hydrogen absorptions of LaFe11.5Si1.5 compound in 1-atm hydrogen gas at different temperatures are investigated. The hydrogen content in the hydrogenated sample does not increase with the increase of temperature of hydrogen absorption but changes complicatedly. The characteristic of first-order transition in LaFe11.5Si1.5 compound is weakened after hydrogen absorption. It leads the peaks of magnetic entropy to become wider and the hysteresis loss to reduce significantly, but relative cooling power (RCP) is not changed considerably.

Key words: magnetic refrigerant, Curie temperature, hydrogen absorption temperature, magne-tocaloric effect

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

  • 75.30.Sg
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)