Abstract: Sintered nickel capillary wicks with controlled porosity, pore size distribution and high strength were prepared by salt-leaching pore forming method. The influences of different soluble salt addition and particle size on the capillary pumping performance were investigated. The results showed that the porosity of sintered nickel wicks was increased linearly with the increasing of soluble salt amount. When the amount of soluble salt was up to 40 wt%，the nickel wicks porosity reached to 73 % with high strength. Changing the particle size of soluble salt can influence the pore size distribution of the wicks，but the porosity didn’t change obviously. The experimental research on the capillary pumping performance showed that the capillary pumping performance of the wicks was controlled not only by the porosity, but also the pore size distribution. With the same porosity, wicks with smaller pore size and more centralized pore size distribution showed more excellent capillary pumping performance.

Key words: salt-leaching pore forming, sintered capillary wicks, capillary pumping performance, pore size distribution

摘要： 本研究采用溶盐造孔法成功制备了孔隙率及孔径分布可控的高强度烧结镍毛细芯，分析了不同质量及粒度的溶盐对毛细性能的影响。实验结果表明：随溶盐添加量的增加，烧结镍芯孔隙率趋于线性增长，当添加量为40 wt%时，烧结镍芯孔隙率高达73 %，且有足够的强度。改变溶盐的粒度影响毛细芯孔径的分布，但对整体孔隙率影响不大。制备的试样的毛细抽吸特性研究表明，毛细芯的毛细抽吸性能不仅仅受孔隙率的影响，同样受孔径分布状态的影响，孔隙率相当的情况下，孔径较小且分布集中的毛细芯表现出更优异的毛细抽吸性能。

关键词: 溶盐造孔, 烧结毛细芯, 毛细抽吸性能, 孔径分布