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With the global commitment to carbon reduction and the enforcement of the “Kyoto Protocol”, replacing SF6 gas in high-voltage circuit breakers has become an urgent task due to its high global warming potential. This paper comprehensively reviews the recent progress in research on copper-tungsten electrical contact materials for environmentally friendly gas circuit breakers. The development and properties of alternative gases, particularly C4F7N and C5F10O, are discussed, including their insulation characteristics, thermodynamic properties, and arc-extinguishing mechanisms. The paper analyzes the unique challenges faced by contact materials in environmentally friendly gas environments, including thermal conductivity requirements, mechanical strength demands, and chemical stability concerns. Recent advances in material modification through element addition, compound reinforcement, and advanced preparation technologies are examined. Special attention is given to the performance evaluation methods and optimization strategies for copper-tungsten contacts under new gas conditions. The review also highlights the critical relationship between material properties, microstructure, and service performance, providing insights for the future development of contact materials for environmentally friendly circuit breakers.

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Progress in Research on Copper-Tungsten Electrical Contact Materials for Environment-Friendly Gas Circuit Breakers

  • 会议论文

  • 发表日期：

    2026年

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  • Congrui Zhang,
  • Tan Liu,
  • Yi Ding,
  • Yu Han,
  • Zhen Pang,
  • Jiexin Zhang,
  • Wenjie Liu,
  • Xingyu Zhao

摘要

With the global commitment to carbon reduction and the enforcement of the “Kyoto Protocol”, replacing SF6 gas in high-voltage circuit breakers has become an urgent task due to its high global warming potential. This paper comprehensively reviews the recent progress in research on copper-tungsten electrical contact materials for environmentally friendly gas circuit breakers. The development and properties of alternative gases, particularly C4F7N and C5F10O, are discussed, including their insulation characteristics, thermodynamic properties, and arc-extinguishing mechanisms. The paper analyzes the unique challenges faced by contact materials in environmentally friendly gas environments, including thermal conductivity requirements, mechanical strength demands, and chemical stability concerns. Recent advances in material modification through element addition, compound reinforcement, and advanced preparation technologies are examined. Special attention is given to the performance evaluation methods and optimization strategies for copper-tungsten contacts under new gas conditions. The review also highlights the critical relationship between material properties, microstructure, and service performance, providing insights for the future development of contact materials for environmentally friendly circuit breakers.