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銦對MgH2脫氫性能的影響
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國家自然科學(xué)基金 (51071068)；廈門理工學(xué)院引進(jìn)人才基金 (YKJ12004R)


Effects of Indium on the Dehydriding Properties of MgH2
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    摘要:

    將MgH2和In的混合粉末在行星式球磨機(jī)上進(jìn)行球磨，制備了一種MgH2-In的復(fù)合物。利用XRD分析了復(fù)合物的相組成以及吸放氫過程中的相轉(zhuǎn)變；用氣相色譜儀和差示掃描量熱儀測定了復(fù)合物的脫氫性能和相轉(zhuǎn)變溫度，并用基于Sievert原理的全自動氣體吸附儀測定了復(fù)合物的吸放氫熱力學(xué)和動力學(xué)性能。結(jié)果表明，脫氫過程中Mg3In和Mg(In)固溶體的形成使MgH2的脫氫反應(yīng)焓和激活能顯著降低，從而降低了MgH2的脫氫溫度，并顯著改善了動力學(xué)性能

    Abstract:

    A kind composite of MgH2-In was prepared by ball milling the powder mixtures of MgH2 and In on a planetary mill. XRD was used to analyze the phases and phase transition during hydriding/dehydriding process of the composite. The dehydriding properties and phase transition temperature of the composite were investigated by DSC and GC (Gas Chromatograph). The thermodynamic and kinetic properties of hydrogenation/dehydrogenation of the composite were measured by the automatic gas adsorption instrument based on Sievert principle. The results indicate that the enthalpy and activation energy of hydrogen desorption of MgH2 are significantly reduced due to the formation of Mg3In and Mg(In) solid solution during the dehydriding process. Thus the dehydriding temperature of MgH2 is decreased, and the kinetics is greatly improved

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鐘海長,王 輝.銦對MgH2脫氫性能的影響[J].稀有金屬材料與工程,2014,43(11):2806~2809.[Zhong Haichang, Wang Hui. Effects of Indium on the Dehydriding Properties of MgH2[J]. Rare Metal Materials and Engineering,2014,43(11):2806~2809.]
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  • 收稿日期:2013-11-08
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  • 在線發(fā)布日期: 2015-04-07
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