Excellent ultra-thin heat pipes (UTHP) require a wick with high capillary force (ΔP_c) and a good permeability performance (K). In this work, a copper powder-fiber composite wick was fabricated by sintering of the copper powder and fiber mixture. Effects of the copper powder particle size, copper powder volume ratio, as well as the super-hydrophilic treatment were investigated, and the results indicate that the copper powder volume ratio is the most significant factor by orthogonal experiments. Moreover, sensitivity analysis shows that super-hydrophilic treatment contributes the lower capillary force and higher permeability, except when copper powder particle size is high to 80 mesh and powder ratio is low to 20%. Interestingly, the overall capillary performance (ΔP_c·K) of the super-hydrophilic treated wicks is significantly improved. Besides, for the super-hydrophilic treated wicks, both the smaller copper powder particle size and volume ratio contribute the higher permeability and better comprehensive performance, even though a worse capillary force.

良好的超薄热管（UTHP）需要具有高毛细管力（ΔP灯芯_Ç）和良好的渗透性能（K）。在这项工作中，通过烧结铜粉和纤维混合物来制造铜粉纤维复合芯。研究了铜粉粒度，铜粉体积比以及超亲水处理的影响，结果表明，正交试验表明，铜粉体积比是最重要的因素。此外，敏感性分析表明，超亲水处理有助于降低毛细作用力和提高渗透性，除非铜粉的粒径高至80目，且粉末比低至20％。有趣的是，整体的毛细管性能（ΔP _Ç经超亲水处理的灯芯的·K）显着提高。此外，对于经过超亲水处理的灯芯，即使毛细力变差，较小的铜粉粒径和体积比也有助于较高的渗透性和更好的综合性能。