淡江大學機構典藏:Item 987654321/35363
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    題名: 六硼化鑭合成與性質
    其他題名: Synthesis and property of lanthanum hexaboride
    作者: 蔡秉叡;Tsai, Bing-ray
    貢獻者: 淡江大學機械與機電工程學系碩士班
    林清彬;Lin, Ching-bin
    關鍵詞: 六硼化鑭;高溫低壓合成;遮蔽係數;穿透率;Lanthanum hexaboride;Low pressure sintering method;Shading Coefficient;Transmittance
    日期: 2009
    上傳時間: 2010-01-11 06:26:19 (UTC+8)
    摘要: 本研究使用七莫耳結晶水之氯化鑭、硼氫化鈉與鎂粉末於高溫(600、800及1000℃)低壓(10-2torr)條件下成功合成出六硼化鑭顆粒，六硼化鑭的結晶程度隨合成溫度增加而上升。將合成的六硼化鑭顆粒均勻混入壓克力系感光UV膠內，且經球磨混練及粒徑微細化後製得的隔熱膠，經光譜儀分析知近紅外光遮蔽效果隨合成溫度增加及粒徑減小而增加；隔熱膠固化及接著於6mm單層玻璃基材後再濺鍍約30nm金鍍層及6mm單層玻璃基材濺鍍金鍍層後再與固化隔熱膠接著，發現前者之結構模組俱較低的遮蔽係數。3mm單層玻璃間膠合固化隔熱膠及金鍍層後，由於光在界面間的多重反射及吸收，近紅外光遮蔽效果較隔熱膠固化於6mm單層玻璃基材後再濺鍍金鍍層佳。
    This study has successfully synthesized lanthanum hexaboride by using magnesium powder, NaBH4 and LaCl3·7H2O at high temperature (600、800、1000℃) and low pressure (10-2 torr). The crystalline degree of lanthanum hexaboride increased with raisingsynthesizing temperature. The heat-insulating resin was prepared by uniformly blending synthesized lanthanum hexaboride particulates into UV-curing acrylic resin, then thelanthanum hexaboride particulates of the mixture was ball-milled to nano-scaled meter. The spectrum analysis showed that the near-infrared shielding effect increased accordingto increased synthesizing temperature and decreased particle size. Comparing two modules of different layer sequence on the surface of the 6mm thickness-glass substrate：(1)curing heat-insulating resin before sputtering a about 30nm gold layer ；and (2)sputtering a about 30nm gold layer before coating and curing a heat-insulating resin, respectively which alower shading coefficient was obtained on the module of former structure. Thenear-infrared shielding effect of the module with laminated a cured heat-insulating resin and then sputtering a about 30nm gold layer between 3mm-thickness glasses is better than the module with cured a heat-insulating resin on the surface of the 6mm-thickness glass substrate and then sputtering a about 30nm gold layer . The positive effect is due to the multiple reflection and absorption of light between interfaces.
    顯示於類別:[機械與機電工程學系暨研究所] 學位論文

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