本研究是以甲醛為還原劑、利用碳酸氫納受熱裂解產生氣體為發泡劑，於溫度85℃下，結合化學還原及發泡機制，反應約半個小時後製備出粒徑約為60nm且具有孔洞結構的奈米銀材料，以作為熱導管內部的毛細結構。利用SEM, XRD觀察材料的型態，且將材料以模具成型的方式成型經由不同溫度熱處理過後測量孔隙度與滲透率之變化，最後應用在熱管內部並藉由探討注水量、孔隙度、堆積厚度、孔徑分佈以及不同工作流體對於熱管熱阻之影響，在長90mm寬25mm、厚度0.5mm、孔隙度80%、孔徑500nm以及工作流體為水在工作瓦數為60W之條件下可得到熱管最低熱阻0.86[℃/W]。

In this study, we used formaldehyde as reducing agent and sodium bicarbonate as foaming agent, to successfully synthesize nanosized silver materials at 85℃ with porous structure composed of aggregated particles whose mean size was about 60nm. These porous silver materials were subsequently applied as capillary structure in a copper heat pipe. The morphology and composition of these materials were characterized by SEM and XRD. The porous silver material was pressed by a model to make an Ag packing film, and subsequently measured the changes of porosity and permeability of that after heat treatment with different temperatures. Finally these materials were applied in a heat pipe to study the effect, e.g. water content, porosity, packing thickness, pore size distribution as well as different kinds of working fluids, on the heat resistance of the heat pipe. With an Ag packing film, 90mm x 25mm x 0.5mm in size, porosity 80% and pore size 515nm, one could get the lowest heat resistance 0.86[℃/W] of heat pipe at working power 60W while water was used as working fluid.

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