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用 PMMA预聚合单体与 Li Cl O4粉末以不同比例直接混合均匀 ,固化成 3mm厚的板 ,以它为靶 ,在纯氩气气氛及 rf -溅射沉积条件下制备各种薄膜 ,用双电层电容常数法研究它们的离子导电性能。在室温下测试 ,外加信号 1 2 0 m V,频率 40 0 Hz。实验结果表明 ,当氩气压强 (PA r)为4.7— 7.2 Pa,靶掺杂质量比为 1 0 % ,射频功率密度为 3.9— 4.2 W/ cm2 时得到的薄膜为离子导体。当氩气压强为 6.0 Pa,射频功率密度为 4.2 4 W/ cm2 时 ,膜的双电层电容常数为 7.0× 1 0 -2 μf/ cm2 ,离子导电性能最好 ,其电阻率 >1 0 1 1Ω .cm。利用该离子导体薄膜制备的可变反射电致变色镜 ,Al(40 nm) /α- WO3(1 0 0 nm) / PMMA +Li Cl O4(1 60 nm) / Ni O(80 nm) / ITO/ glass,着色态和漂白态可见光平均反射比分别为 0 .2 3和 0 .69。利用红外光谱 (1 90 0— 50 0 cm-1 )对纯 PMMA和 PMMA +Li Cl O4离子导体进行分析 ,发现离子导体膜“- C- O- CH3”侧链的吸收峰在 1 1 85.7cm-1 ,非离子导体膜的吸收峰在 969.2 cm-1处 ,前者侧链具有较强的极性。
PMMA prepolymerized monomer and LiClO4 powder were directly mixed in different proportions and solidified to form a 3mm thick plate. Using it as a target, various thin films were prepared under pure argon atmosphere and rf-sputter deposition conditions, Electro-capacitance constant method to study their ionic conductivity. Test at room temperature, plus a signal of 120 mV at a frequency of 40 0 Hz. The experimental results show that when the pressure of argon (PA r) is 4.7-7.2 Pa, the target mass ratio is 10% and the RF power density is 3.9-4.2 W / cm 2, the obtained thin film is an ion conductor. When the argon pressure is 6.0 Pa and the radio frequency power density is 4.2 4 W / cm2, the electric double layer capacitance constant of the film is 7.0 × 10-2 μf / cm2, and the ionic conductivity is the best. The resistivity is> 1 0 1 1Ω .cm. Al (40 nm) / α-WO3 (100 nm) / PMMA + LiClO4 (160 nm) / NiO (80 nm) / ITO / glass, the average visible reflectance of the colored state and the bleached state are respectively 0.23 and 0.69. Analysis of pure PMMA and PMMA + LiClO4 ion conductors by infrared spectroscopy (1 90 0 - 50 0 cm-1) showed that the absorption peak of "C-O- -1, the non-ionic conductor membrane absorption peak at 969.2 cm-1, the former side chain has a strong polarity.