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OALib Journal期刊
ISSN: 2333-9721
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ti1.0mn0.9v1.1的添加对氢化燃烧合成复合机械球磨制备mg95ni5放氢性能的影响
DOI: 10.3969/j.issn.1671-7627.2014.01.001, PP. 1-6
Keywords: 镁基储氢材料,氢化燃烧合成,机械球磨,放氢性能,氢泵作用
Abstract:
采用氢化燃烧合成法(hcs)制备mg95ni5+x%ti1.0mn0.9v1.1(x=0、10、20和30)复合物,然后将氢化燃烧合成产物进行机械球磨(mm)得到镁基复合储氢材料。采用压力-浓度-温度(pct)曲线、x线衍射仪(xrd)和扫描电子显微镜(sem)研究材料的放氢性能、相结构、表面形貌以及颗粒化学成分。研究表明:添加30%(质量分数)ti1.0mn0.9v1.1可使mg95ni5的hcs+mm产物的放氢性能达到最佳,在523k时1200s内就可完全放氢,放氢量达5.71%,同时放氢反应的表观活化能从148.20kj/mol降低到129.69kj/mol,这主要归因于ti1.0mn0.9v1.1的添加提高了氢在产物中的扩散能力以及对镁基氢化物放氢的氢泵作用。
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