| Summary: | 碩士 === 國立成功大學 === 化學工程學系碩博士班 === 100 === 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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