Formation of different arc-anode attachment modes and their effect on temperature fluctuation for carbon nanomaterial production in DC arc discharge
Formation of different arc-anode attachment modes and their effect on temperature fluctuation for carbon nanomaterial production in DC arc discharge
复制标题
DOI：
10.1016/j.carbon.2017.02.084
复制
发表时间：
2017-06-01
期刊：
影响因子：
10.9
通讯作者：
Watanabe, Takayuki
中科院分区：
文献类型：
--
作者：
Liang, Feng;Tanaka, Manabu;Watanabe, Takayuki
采用直流电弧放电制备碳纳米材料时，观察到了扩散和多重电弧-阳极附着模式。研究了电弧电流和电极间距对不同附着模式形成的影响。不同附着模式的形成可以通过阴极射流和阳极射流的竞争来解释。在电弧放电过程中，碳电极的表面温度通过双色高温计结合高速摄像机采用适当的带通滤波器测量。研究了电弧-阳极附着方式与电极表面温度波动的关系。扩散电弧-阳极附着模式下，由于洛伦兹力的不平衡，弧斑旋转剧烈，导致阳极表面温度波动较大，导致阳极存款上合成的多壁碳纳米管纯度较低。(C)2017爱思唯尔有限公司版权所有
Diffuse and multiple arc-anode attachment modes were observed when using DC arc discharge to prepare carbon nanomaterials. The effects of arc current and electrode gap distance on the formation of different attachment modes were investigated. The formation of different attachment modes is explained by the competition of the cathode jet and the anode jet. During the arc discharge, the surface temperature of the carbon electrode was measured by two-colour pyrometry combined with a high-speed camera employing appropriate band-pass filters. The relationship between the arc-anode attachment mode and the temperature fluctuation of the electrode surface was investigated. Due to the unbalanced Lorenz force, the rotation of arc spot was severe in diffuse arc-anode attachment mode, which led to relatively large temperature fluctuations on the anode surface, resulting in low purity of synthesised multi-wall carbon nanotubes on the anode deposit. (C) 2017 Elsevier Ltd. All rights reserved.