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LaFe11.6Si1.4合金的常溫吸放氫行為
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國家自然科學基金（51176050）


Hydrogen Absorption and Desorption Behaviour of LaFe11.6Si1.4 Magnetocaloric Alloy at Room Temperature
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    摘要:

    研究了LaFe11.6Si1.4磁制冷材料25 ℃下的吸放氫熱力學及不同氫壓（2.0×106、2.5×106及3.0×106 Pa）下的吸氫動力學行為。結果表明：LaFe11.6Si1.4合金常溫吸放氫存在約2×105 Pa的嚴重滯后現(xiàn)象，吸氫過程存在氫壓敏感的吸氫孕育期，提高氫壓可快速完成吸氫飽和，但對飽和吸氫量影響甚微。常溫下難于通過改變氫壓的技術制備精確含氫量即可變居里溫度的LaFe11.6Si1.4室溫磁制冷材料

    Abstract:

    The hydrogen absorption-desorption thermodynamics of the magnetic refrigeration material LaFe11.6Si1.4 alloy at 25 oC and its hydrogen absorption kinetics under different hydrogen pressures (2.0×106, 2.5×106 and 3.0×106 Pa) have been investigated. The results show that about 2×105 Pa hysteresis occurs in the process of hydrogen absorption and hydrogen desorption of LaFe11.6Si1.4 alloy at room temperature; there is an incubation period sensible to the hydrogen pressure in the process of hydrogen absorption. Increasing hydrogen pressure conduces to saturated alloy hydride rapidly, whereas it slightly influences the hydrogen absorption capacity. It is difficult to prepare LaFe11.6Si1.4 magnetic refrigeration material with accurate hydrogen content, i.e. variable Curie temperature, via changing the hydrogen pressure at room temperature

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羅輝輝,陳云貴,唐永柏,陳 湘,巫江虹,劉超鵬. LaFe11.6Si1.4合金的常溫吸放氫行為[J].稀有金屬材料與工程,2013,42(10):2136~2138.[Luo Huihui, Chen Yungui, Tang Yongbo, Chen Xiang, Wu Jianghong, Liu Chaopeng. Hydrogen Absorption and Desorption Behaviour of LaFe11.6Si1.4 Magnetocaloric Alloy at Room Temperature[J]. Rare Metal Materials and Engineering,2013,42(10):2136~2138.]
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  • 收稿日期:2012-11-23
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