We develop the method of production of conductive vacuum-tight ceramics based on Al₂O₃ modified by multiwall carbon nanotubes (MWCNTs) at extremely low their content. The method is based on the use of nanopowders of α-Al₂O₃ combined with application of highly efficient distribution of MWCNTs on the surface of the initial oxide particles, provided by using ultrasonicated MWCNT suspensions stabilized with surfactant. The usage of surfactant destructing of MWCNT agglomerates of structure results in the elimination of cavities in ceramic matrix and improvement vacuum-tight properties of composites. The results can provide the optimization of production technology of strong vacuum-tight ceramics which are perspective for the production of conducting ceramics for accelerating tubes in pulse linear accelerators. Such materials would make it possible to avoid using high-voltage resistive voltage splitters and simultaneously suppress transverse resonance modes usually leading to transverse instability of intense beams in long accelerating structures.

我们开发了基于Al ₂ O ₃的导电真空密封陶瓷的生产方法，该陶瓷经多壁碳纳米管（MWCNT）改性后含量极低。该方法是基于使用的纳米粉末的α-Al ₂ ö ₃通过使用表面活性剂稳定的超声MWCNT悬浮液，结合在初始氧化物颗粒表面上高效分散MWCNT的应用。使用表面活性剂破坏结构的MWCNT团聚体可消除陶瓷基体中的空腔，并改善复合材料的真空密封性能。结果可以优化强真空密封陶瓷的生产技术，这是生产用于脉冲线性加速器中加速管的导电陶瓷的前景。这种材料将有可能避免使用高压电阻分压器，并同时抑制通常导致长加速结构中强光束的横向不稳定性的横向共振模式。