| Mg95Ni5-30wt%La0.7Mg0.3Ni2.8Co0.5复合物的吸放氢性能研究 |
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| 引用本文： | 刘燕芳,朱云峰,华峰,刘志兵,李李泉.Mg95Ni5-30wt%La0.7Mg0.3Ni2.8Co0.5复合物的吸放氢性能研究[J].功能材料,2009,40(5). |
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| 作者姓名： | 刘燕芳 朱云峰 华峰 刘志兵 李李泉 |
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| 作者单位： | 南京工业大学,材料科学与工程学院,江苏,南京,210009 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2007AA05Z110) |
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| 摘 要： | 先采用氢化燃烧合成法制备Mg95Ni5,然后将氢化燃烧合成产物与30%(质量分数)La0.7Mg0.3Ni2.8Co0.5合金进行机械球磨复合,球磨时间分别为5、10、15和20h;将Mg95Ni5的氢化燃烧合成产物直接球磨10h用于对比研究.采用X射线衍射仪、扫描电镜、能谱仪及气体反应控制器研究了材料的相组成、微观形貌、颗粒化学成分以及吸放氢性能.研究表明,球磨10h的Mg95Ni5/La0.7Mg0.3Ni2.8Co0.5复合物具有最佳的吸放氢性能,在373K,50s内基本达到饱和吸氢量3.78%(质量分数);在523K,1800s内放氢量为3.83%(质量分数);其起始放氢温度为425K,与Mg95Ni5相比降低了35K,吸放氢性能的改善与复合物的组织结构密切相关.此外,La0.7Mg0.36Ni2.8Co0.5的加入改善了复合物的放氢动力学性能.
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| 关 键 词： | 镁基储氢合金 氢化燃烧合成 机械球磨 吸放氢性能 复合物 |
Investigation on the hydriding/dehydriding properties of Mg_(95)Ni_5-30wt%La_(0.7)Mg_(0.3)Ni_(2.8)Co_(0.5) composite |
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| LIU Yan-fang
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ZHU Yun-feng
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HUA Feng
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LIU Zhi-bing
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LI Li-quan.Investigation on the hydriding/dehydriding properties of Mg_(95)Ni_5-30wt%La_(0.7)Mg_(0.3)Ni_(2.8)Co_(0.5) composite[J].Journal of Functional Materials,2009,40(5). |
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| Authors: | LIU Yan-fang ZHU Yun-feng HUA Feng LIU Zhi-bing LI Li-quan |
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| Affiliation: | College of Materials Science and Engineering;Nanjing University of Technology;Nanjing 210009;China |
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| Abstract: | Mg95Ni5 was prepared by hydriding combustion synthesis(HCS) from the powder mixtures of Mg and Ni,and then the HCS product together with 30wt% La0.7Mg0.3Ni2.8Co0.5 alloy were subjected to mechanical milling for 5,10,15 and 20h,respectively.The HCS product was also milled for 10h for comparison.By means of X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectrometer(EDX) and gas reaction controller,the phase structure,microstructure and hydriding/dehydriding properties of the... |
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| Keywords: | Mg-based hydrogen storage alloys hydriding combustion synthesis mechanical milling hydriding/dehydriding properties composite |
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