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为提高铅酸蓄电池板栅材料的性能,在Pb-Ca-Sn-Al合金中添加了Sm-La二元稀土元素,研究其含量对显微结构和电化学性能的影响。利用金相和循环伏安、线性扫描、阻抗-电位、电化学阻抗谱等电化学测试方法对板栅性能进行了表征。结果表明:Sm-La稀土元素的加入促进合金晶粒细化,随其含量的增加,析出物颗粒变小并弥散分布。与添加Sm的合金相比,复合添加Sm-La的材料具有更低的析氢电位,改善了深放电时铅合金上所形成的阳极Pb(II)膜的阻抗特性,表现出良好的性能。 相似文献
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Electrical and structural properties of diamond films implanted by various doses of oxygen ions 下载免费PDF全文
Oxygen-doped diamond films are prepared by implanting various dose
oxygen ions into the diamond films synthesized by hot filament
chemical vapour deposition, and their electrical and structural
properties are investigated. Hall effect measurements show that
lower dose oxygen ion implantation is beneficial to preparing n-type
diamonds. The carrier concentration increases with the dose
increasing, indicating that oxygen ions supply electrons to the
diamonds. The results of AES spectrum indicate that oxygen ions are
doped into the diamond films, and the O-implanted depth is around
0.1μm. Raman spectrum measurements indicate that the lower
dose oxygen ion implantation at 1014cm-2 or 1015cm-2 is favourable for producing less damaged O-doped
diamond films. 相似文献
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