氮化鋁粉體在濕氣環境下容易發生水解反應形成氫氧化鋁與氨氣，使氮化鋁高熱傳導性質降低，且當粒徑越小時此情形更為嚴重。為解決水解問題，本論文進行氮化鋁表面改質，並製備環氧樹脂/氮化鋁複合材料。使用矽氧烷偶合劑改質氮化鋁粉後，使其幫助與環氧樹脂之間鍵結；以硬酯酸改質氮化鋁粉，表面形成阻絕水氣之改質層具有抗水解能力。經抗濕測試後，表面改質後粉體均具有抵抗濕氣能力，測試48小時後氧含量上升不到1 wt.%；在抗水解測試中，僅以硬酯酸改質具抗水解能力，測試72小時後pH值變化在0.8以下。在氮化鋁複合材結果顯示，改質後粉體均有較佳熱傳導值但差異不明顯，可能粉體粒徑小而表面積大影響，造成高分子與氮化鋁之間界面熱阻多，導致熱傳導隨著不同表面改質粉體無明顯改變。

The small particle size range of aluminum nitride powder trended to hydrolysis reaction and formed aluminum hydroxide and ammonia in the moisture environment. The high thermal conductivity property of aluminum nitride reduced, and when it become worse as the particle size of aluminum nitride decreased. In this thesis, the surface of aluminum nitride powder was treated and fabrication into Epoxy/Aluminum composite materials. After aluminum nitride powder was treated with the silane coupling agent, it improved the bonding of the epoxy. Aluminum nitride was treated with stearic acid, the surface formed the modified layer that possessed the water-resistance property. By the test of moisture resistance, aluminum nitride powder with surface treatment was proved to resist moisture. And after testing for 48 hours, the oxygen content increased less than 1 wt.%. By the water resistance test, aluminum nitride powder can also have water resistant property by treating with stearic acid. After testing for 72 hours, the pH value changed below 0.8. The results of Epoxy/Aluminum nitride composite materials showed that the treated powders had better thermal conductivity values but the difference was not obvious. Because of the particle size of the powders were small and the surface area of aluminum nitride were large, these factors caused the thermal resistance of the increasing interface between the polymer and aluminum nitride. Therefore, the thermal conductivity didn't changed significantly with different treated surface of powder.

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