化工学报 ›› 2012, Vol. 63 ›› Issue (2): 463-469.DOI: 10.3969/j.issn.0438-1157.2012.02.018

• 流体力学与传递现象 • 上一篇    下一篇

烧结镍毛细芯的孔参数控制及其对抽吸性能的影响

徐计元1,邹勇2,程林1   

  1.   1山东大学热科学与工程研究中心,山东 济南 250061;2山东大学材料液态结构及遗传性教育部重点实验室,山东济南 250061
  • 收稿日期:2011-02-19 修回日期:2011-11-11 出版日期:2012-02-05 发布日期:2012-02-05
  • 通讯作者: 徐计元

Pore parameters control and the influence on the capillary pumping performance of sintered nickel wicks

XU Jiyuan1,ZOU Yong2,CHENG Lin1   

  1.  
    1Institute ofThermal Science and Technology, Shandong University,Jinan 250061,Shandong,China;
    2Key Labof Liquid Structure and Heredityof Materials, Ministry ofEducation, ShandongUniversity,
    Jinan 250061,Shandong,China
  • Received:2011-02-19 Revised:2011-11-11 Online:2012-02-05 Published:2012-02-05

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

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

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