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新型碳化改性石墨电极,用于提高气体开关的性能

Motao Zhang¹, Haoran Zhang¹, Xudong Qiu¹

¹Northwest Institute of Nuclear Technology, Xi'an 710024, China.

The Review of scientific instruments

|December 24, 2025

概括

碳化 (SiC) 表面修改增强了气体开关的石墨电极. 这提高了故障稳定性,增加了故障电压,减少了可靠电气应用的变化.

科学领域:

材料科学材料科学材料科学
电气工程电气工程
表面化学表面化学

背景情况:

石墨电极在气体开关应用中至关重要,但受到分解不稳定的影响.
提高石墨电极的电性能和稳定性对于先进的开关系统至关重要.

研究的目的:

调查碳化 (SiC) 表面修饰在提高石墨电极分解稳定的有效性.
分析SiC涂层对石墨电极电气特性和微形态学的影响.

主要方法:

使用化学蒸汽透 (CVI) 来修改石墨电极的表面,以涂上密集的SiC涂层.
通过电子排放实验和自我分解试验对原始和SiC修饰电极进行比较分析.
使用扫描电子显微镜 (SEM) 进行微结构性表征.

主要成果:

SiC的修改使值电场增加了10% (208.4至229.2kV/cm),并降低了表面电场增强因子.
使用SiC修改电极的开关显示平均故障电压高出8.7% (36.62比33.69千伏).
观察到故障电压的相对标准偏差减少了52% (2.15%与4.50%相比),表明了优越的稳定性. 在实验后,SiC层保持了完整性.

结论:

C表面修饰是一种非常有效的策略,可以显著提高石墨电极的分解稳定性.
性能提升归因于抑制不均质电子排放和提高SiC涂层的机械强度.
这种技术为开发高稳定性气体排放开关系统提供了一个有前途的途径.

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