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铝电解预焙槽降低阳极毛耗生产实践 被引量:6
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作者 陈富强 《甘肃冶金》 2011年第6期16-18,共3页
介绍了某电解铝厂120 kA系列铝电解槽在不改变阳极极结构的情况下,通过优化技术条件,提高电流效率;通过提高阳极质量管理,合理安排阳极消耗,加强阳极防氧化工作,延长了换极周期。通过一系列生产实践,探索出一套阳极使用管理办法及与之... 介绍了某电解铝厂120 kA系列铝电解槽在不改变阳极极结构的情况下,通过优化技术条件,提高电流效率;通过提高阳极质量管理,合理安排阳极消耗,加强阳极防氧化工作,延长了换极周期。通过一系列生产实践,探索出一套阳极使用管理办法及与之匹配的工艺技术条件,达到提高电流效率、降低阳极毛耗和电耗的双重效果。 展开更多
关键词 铝电解 预焙槽 阳极毛耗 阳极管理
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X线管旋转阳极高速启动器故障1例
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作者 黄昌永 张阿平 刘利辉 《医疗设备信息》 2000年第6期47-47,共1页
关键词 X线管理旋转阳极高速启动器 故障现象 故障排除 检查分析 医用放射线设备
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高性能强流脉冲电子束源关键技术研究
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作者 荀涛 杨汉武 +2 位作者 张军 刘列 张建德 《强激光与粒子束》 EI CAS CSCD 北大核心 2020年第2期13-19,共7页
强流脉冲电子束源是高功率微波系统的核心部件之一,针对未来应用需求,亟需从绝缘、束流输运和热管理等多个方面提升强流束源技术性能。介绍了国防科技大学在高功率微波源用强流真空电子束源方面的研究进展。针对高功率微波管保真空需求... 强流脉冲电子束源是高功率微波系统的核心部件之一,针对未来应用需求,亟需从绝缘、束流输运和热管理等多个方面提升强流束源技术性能。介绍了国防科技大学在高功率微波源用强流真空电子束源方面的研究进展。针对高功率微波管保真空需求,基于陶瓷金属钎焊,设计并研制了一种强场陶瓷真空界面,耐压大于600 kV、平均绝缘场强达到44 kV/cm、耐受脉宽大于80 ns,重复频率运行稳定;研制了一种基于SiC纳米线的强流电子束源冷阴极,在90 kV/cm的场条件下获得了1.17 kA/cm^2的束流密度,相比传统天鹅绒阴极,SiC纳米线阴极的宏观电稳定性、发射均匀性及运行寿命均得到显著提高;针对相对论返波管,研制基于螺旋水槽型的强流电子束收集极,克服了高比能和低流速的矛盾,耐受热流密度达到10^12 W/m^2,能够满足系统长脉冲、高重复频率运行要求。 展开更多
关键词 高功率微波 强流电子束源 陶瓷真空界面 纳米线阴极 阳极管理
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Vertically oriented TiO_2 nanotube arrays with different anodization times for enhanced boiling heat transfer 被引量:7
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作者 XU Jia YANG MingJie +1 位作者 XU JinLiang JI XianBing 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第8期2184-2190,共7页
Pool boiling of saturated water on a plain Ti surface and surfaces covered with vertically-oriented TiO2 nanotube arrays(NTAs) has been studied.The technique of potentiostatic anodization using non-aqueous electrolyte... Pool boiling of saturated water on a plain Ti surface and surfaces covered with vertically-oriented TiO2 nanotube arrays(NTAs) has been studied.The technique of potentiostatic anodization using non-aqueous electrolytes was adopted to fabricate three types of TiO2 NTAs distinguished by their anodization time.Compared to the bare Ti surface,the incipient boiling wall superheat on the TiO2 NTAs was decreased by 11 K.Both the critical heat flux and heat transfer coefficient of pool boiling on the TiO2 NTAs were higher than those from boiling on a bare Ti surface.The measured maximum critical heat flux and heat transfer coefficient values were 186.7 W/cm2 and 6.22 W/cm2K,respectively.Different performances for the enhancement of heat transfer by the three types of TiO2 NTAs were attributed to the different degrees of deformation in the nanostructure during boiling.Long-term performance of the nanomaterial-coated surfaces for enhanced pool boiling showed degradation of the TiO2 NTAs prepared with an anodization time of 3 hours. 展开更多
关键词 TiO2 nanotube arrays pool boiling heat transfer enhancement deformation of nanostructure
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Synthesis and Characterization of Niobium-doped TiO_2 Nanotube Arrays by Anodization of Ti-20Nb Alloys 被引量:4
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作者 Zhengchao Xu Qi Li +1 位作者 Shian Gao Jianku Shangi 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2012年第10期865-870,共6页
Well crystallized niobium-doped TiO; nanotube arrays (TiNbO-NT) were successfully synthesized via the anodization of titanium/niobium alloy sheets, followed with a heat treatment at 550 ℃ for 2 h. Morphology analys... Well crystallized niobium-doped TiO; nanotube arrays (TiNbO-NT) were successfully synthesized via the anodization of titanium/niobium alloy sheets, followed with a heat treatment at 550 ℃ for 2 h. Morphology analysis results demonstrated that both the titanium/niobium alloy microstructure and the dissolution strength of electrolyte played major roles in the formation of nanotube structure. A single-phase microstructure was more favorable to the formation of uniform nanotube arrays, while modulating the dissolution strength of electrolyte was required to obtain nanotube arrays from the alloys with multi-phase microstructures. X-ray diffraction (XRD) and X-ray photoelectron (XPS) analysis results clearly demonstrated that niobium dopants (Nb^5+) were successfully doped into TiO2 anatase lattice by substituting Ti^4+ in this approach. 展开更多
关键词 TIO2 Nanotube arrays Anodization DOPING
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