关键词: 溶盐造孔, 烧结毛细芯, 毛细抽吸性能, 孔径分布

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