铁催化高压歧化生成的单壁碳纳米管氢等离子体的微波损耗机理

Investigation on microwave attenuation mechanisms of hydrogen plasma in HiPco single wall carbon nanotubes

运用双流体理论,在同时考虑了单壁碳纳米管中氢等离子体的电子碰撞吸收和氢离子碰撞吸收的基础上,理论推导出了铁催化高压歧化生成的单壁碳纳米管中氢等离子体的微波衰减系数公式,数值计算了0.2～18GHz频段的微波衰减系数.计算结果表明,铁催化高压歧化生成的单壁碳纳米管中氢等离子体对2.45GHz的微波产生强烈损耗.理论值与实验数据相吻合.

Using double-fluid theory, a microwave attenuation coefficient of hydrogen plasma in Single Wall Carbon Nanotubes （SCNTs）, which were grown by iron-catalyzed high-pressure disproportionation （HiPeo）, is deduced theoretically. In this paper, both the electron collision absorption and ion collision absorption of hydrogen plasma in SCNTs are considered in detail. Under different conditions, microwave attenuation coefficient is calculated theoreti- cally in the frequency range of 0. 2 - 18 GHz. The simulation results show that hydrogen plasma in HiPco SCNTs ex- hibits strong microwave （ around 2.45 GHz） absorption. The numerical results are in good agreement with the ex- perimental data.