| La_(1.8)Ca_(0.2)Mg_(14)Ni_3合金在甲苯溶液中球磨改性后的储氢性能 |
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| 引用本文： | 汪伦,郭绍义,高林辉,裴有斌.La_(1.8)Ca_(0.2)Mg_(14)Ni_3合金在甲苯溶液中球磨改性后的储氢性能[J].浙江理工大学学报,2011(5). |
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| 作者姓名： | 汪伦 郭绍义 高林辉 裴有斌 |
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| 作者单位： | 浙江理工大学机械与自动控制学院;浙江理工大学材料工程中心; |
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| 基金项目： | 国家自然科学基金(50901068); 浙江省自然科学基金(Y4090495) |
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| 摘 要： | 采用在甲苯介质中球磨以改善La1.8Ca0.2Mg14Ni3的储氢性能。随着球磨时间的增加,合金的吸放氢性能得到显著地提高,在20 h达到最高。其在513 K,4.0 MPa氢压下初次活化时,吸氢质量分数达到了3.95%,在3次活化后,300 K时的吸氢质量分数达到3.85%,在613 K,一个大气压的放氢质量分数在900 s内达到了4.92%。通过XRD和SEM分析,球磨后合金颗粒粒径明显减小且有非晶化趋势。在球磨过程中形成了电子络合体(electrondonor-acceptor,EDA)体系。合金颗粒粒径、非晶化程度和EDA共同作用使球磨20 h的合金表现出最优异的吸放氢性能。
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| 关 键 词： | 镁基合金 球磨 储氢合金 甲苯 动力学 |
Hydrogen Storage Properties of La_(1.8)Ca_(0.2)Mg_(14)Ni_3 Alloy Modified by Ball Milling in Toluene |
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| WANG Luna,GUO Shao-yia,GAO Lin-huib,PEI You-bina.Hydrogen Storage Properties of La_(1.8)Ca_(0.2)Mg_(14)Ni_3 Alloy Modified by Ball Milling in Toluene[J].Journal of Zhejiang Sci-tech University,2011(5). |
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| Authors: | WANG Luna GUO Shao-yia GAO Lin-huib PEI You-bina |
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| Affiliation: | WANG Luna,GUO Shao-yia,GAO Lin-huib,PEI You-bina (Zhejiang Sci-Tech University,a.School of Machinery & Automation,b.Materials Engineering Center,Hangzhou 310018,China) |
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| Abstract: | The hydrogen storage alloy of La1.8Ca0.2Mg14Ni3 is modified by ball-milling in the toluene to enhance its hydriding/dehydriding properties.The results show that increasing the milling time the hydriding/dehydriding properties of the alloy is enhanced dramatically,and 20 h-milled alloy show the best properties.In the initial cycle,it can absorb 3.95 wt.% hydrogen at 513 K.Even at room temperature(about 300 K) it can absorb 3.85 wt.% hydrogen after being activated for three times.And at 613 K it can desorb 4.... |
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| Keywords: | magnesium based alloy ball milling hydrogen storage alloy toluene kinetics |
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