共查询到10条相似文献,搜索用时 46 毫秒
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由于贵金属材料具有独特的抗腐蚀性、生理上的无毒性、良好的延展性以及生物相容性,它在医学领域的应用日益拓展。作者在本文着重介绍贵金属材料在牙科(包括牙科汞齐合金和铸造合金)、针灸、体内植入的电子器件及医用生物传感器等方面的研究与发展,分析了牙科用贵金属材料的演变过程等。 相似文献
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《Journal of Alloys and Compounds》2003,350(1-2):319-323
The charge–discharge cycling behavior of the over-stoichiometric Laves phase alloy Zr0.75Ti0.25V0.9Mn0.4Cr0.3Ni1.4 as hydride electrode has been studied in a negative electrode-limited sealed cell. This cobalt-free alloy shows a maximum discharge capacity Cmax=373 mAh g−1 at 160 mA g−1 discharge current and a high rate dischargeability of 285 mAh g−1 at 1500 mA g−1 discharge rate. After 600 cycles the discharge capacity is 81% of the Cmax; the alloy also shows good charging efficiency (98%) and low temperature discharge rate. 相似文献
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C. Khaldi H. Mathlouthi J. Lamloumi A. Percheron-Gugan 《Journal of Alloys and Compounds》2003,360(1-2):266-271
The effect of iron substitution on the electrochemical behaviour of LaNi3.55Mn0.4Al0.3Co0.75−xFex compounds (x=0, 0.15, 0.55) has been studied by chronopotentiometry and cyclic voltammetry techniques. The maximum capacity decreases linearly from 308 to 239 mAhg−1 when the iron content increases from 0 to 7.3 wt.% (x=0.55). This decrease can be explained by the corrosion of the alloy in the aqueous KOH electrolyte. In spite of this decrease and of the long time needed for the activation, a good stability of discharge capacity was observed in LaNi3.55Mn0.4Al0.3Co0.75−xFex compounds. The reversibility of the electrochemical redox reaction of LaNi3.55Mn0.4Al0.3Co0.75−xFex alloy electrodes has been observed in the alloys least rich in iron. The hydrogen diffusivity in LaNi3.55Mn0.4Al0.3Co0.75−xFex alloy electrodes decreases when increasing the iron content. The obtained values of the hydrogen diffusion coefficient DH, varies between 2.1×10−7 and 8.2×10−9 cm2 s−1 depending on the iron content of the electrode. 相似文献
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电子元器件的发展及其对电子浆料的需求 总被引:4,自引:0,他引:4
本文评述了我国多层片式陶瓷电容器、PDP平板显示器、硅太阳能电池、电子封装等的发展现状以及对电子浆料的要求,同时还评述了贱金属浆料的发展趋势. 相似文献
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半导体微电子技术用贵金属材料的应用与发展 总被引:1,自引:1,他引:0
贵金属具有良好的化学稳定性,高电导率和热导率,特有的电学、磁学、光学等性能,是发展半导体微电子技术必不可少的材料.文章综述了半导体器件欧姆接触、线路和电极、金属化系统、半导体包封,以及化合物半导体、液体金属离子源等用贵金属材料的应用和发展. 相似文献