烧结式微热管的吸液芯成型机理及其制造工艺

目前电子芯片对散热要求的越来越高，烧结式微热管已经成为其理想的散热元件。本文分析了铜粉颗粒在吸液芯中的成型机理，探讨了烧结式微热管吸液芯毛细结构的制造工艺，主要解决了吸液芯成型温度与成型时间的确定，以及烧结时芯棒的固定、抽出与铜粉颗粒的填充等相关问题。结果表明，采用本研究中的制造工艺和在900℃～950℃、30min～60min所烧结出来的吸液芯具有铜粉颗粒分布均匀、对称性好，生产效率高，成本低等优点，并且制成的微热管具有很好的传热性能。

The Forming Mechanism for Sintered Wick in Micro Heat Pipe and its Manufacturing Process

With the increasing cooling requirements for electronic chips, micro heat pipe with sintered wick has become their ideal heat radiator. This paper analyzes the forming mechanism of copper powders in wicks, probes into the manufacturing process of capillary structures of sintered wick in micro heat pipe, and offers means for ascertaining forming temperature and forming time, fixating and extracting the mandrel as well as infilling copper powders. The results show that the wicks sintered at 900℃～950℃ for 30min～60min have the advantages of well-proportioned distribution, good symmetry, high production efficiency, low production cost and etc. And the micro heat pipe with such sintered wick has better heat transfer performance.