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POPESCU Ana-Maria 《高等学校化学研究》2014,(5):800-805
This study deals with SnO2-based ceramic anodes doped with Sb203 and CuO, aiming at contributing new data regarding their electrochemical behavior in cryolite melts. The performances of the anodes were evaluated by anodic polarization, cyclic voltammetry, and current efficiency and corrosion measurements. The investigation proves that the anodic process of SnO2-based inert anodes occurs at a low overvoltage and the oxygen discharge takes place in one step with an exchange of two electrons. The current efficiency and corrosion were proved to be dependent on the electrolysis parameters and composition of electrolysis bath. For a long term electrolysis, the dissolution of the anode in the cryolite-alumina melt produced small aluminium contamination(ca. 0.2%, mass fraction). 相似文献
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尽管还未找到针对维珍银河事故的起因,但联邦航空局(FAA)却要考虑出台商业太空旅行新规定。上月底,维珍银河公司的太空飞船二号在南加利福尼亚州的上空爆炸解体,造为什么重要商业太空旅行可为其它太空探险行动提供技术创新和融资。 相似文献
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《通信业与经济市场》2005,(3):66-66
加利福尼亚州的Cerritos市就要成为第一个在地方性公共汽车系统中部署无线宽带接入的城市了。过去,一直有媒体报道飞机、火车和轮船可通过Wi-Fi系统为乘客提供宽带接入服务,现在,公共汽车也加入到这个行列中来。 相似文献