| 热处理对La0．7Ni2．65Mg0．3CO0．75Mn0.1合金贮氢性能的影响 |
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| 引用本文： | 张艳红,王仲民,颜瑞. 热处理对La0．7Ni2．65Mg0．3CO0．75Mn0.1合金贮氢性能的影响[J]. 电工材料, 2011, 0(3): 33-38 |
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| 作者姓名： | 张艳红 王仲民 颜瑞 |
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| 作者单位： | 桂林电子科技大学材料科学与工程学院,广西桂林,541004 |
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| 基金项目： | 国家自然科学基金(50971049),国家自然科学基金(50961004); 广西人才专项基金(2007230) |
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| 摘 要： | 利用高频感应熔炼炉熔炼La0.7Ni2.65Mg0.3Mn0.1合金，分别经1073K、1123K和1173K热处理12h进行改性实验，研究了热处理对合金性能的影响。X射线衍射表明，热处理后合金主峰的半峰宽变大，相分布均匀，晶粒细化，合金组织趋于一致。电化学测试结果表明，合金经过热处理以后放电容量和电化学循环稳定性均显著提高，这是因为热处理改变了贮氢合金的晶体结构。合金的动力学性能先上升后下降，这与Mg元素在高温热处理过程中的挥发有很大的关系。经过热处理后合金自放电性能降低，这说明热处理不利于贮氢合金自放电性能的改善。
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| 关 键 词： | X射线衍射 电化学性能 自放电性能 |
Effect of Heat Treatment on Hydrogen Storage Properties of La_(0.7)Ni_(2.65)Mg_(0.3)Co_(0.75)Mn_(0.1) Alloys |
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| ZHANG Yan-hong,WANG Zhong-min,YAN Rui. Effect of Heat Treatment on Hydrogen Storage Properties of La_(0.7)Ni_(2.65)Mg_(0.3)Co_(0.75)Mn_(0.1) Alloys[J]. Electrical Engineering Materials, 2011, 0(3): 33-38 |
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| Authors: | ZHANG Yan-hong WANG Zhong-min YAN Rui |
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| Affiliation: | ZHANG Yan-hong,WANG Zhong-min,YAN Rui(School of Materials Science and Technology,Guilin University of Electronic Technology,Guangxi Guilin 541004,China) |
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| Abstract: | La0.7Ni2.65Co0.75Mn0.1 alloys were prepared by induction melting followed by different annealing treatments(1 073,1 123 and 1 173 K) for 12 h.X-ray diffraction haverevealed that the FWHM of main diffraction peaks decreased due to the particle sizedecrease and phase distribution more uniform during post-annealing.Electrochemical experiments indicated that the discharge capacity and cyclic stability are improved significantly due to the changes of alloy structure after heat treatment.The high rate discharge a... |
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| Keywords: | X-ray diffraction electrochemical properties self-discharge property |
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