BaTiO3/PC复合薄膜的制备和光电性质的研究
PREPARATION AND ELECTRO-OPTIC PROPERTIES OF POLED NANOCRYSTALS AND POLYMER COMPOSITE BaTiO3/PC FILMS
用水热法制备了纯钙态矿结构的超细均匀的钛酸钡粉末（～40-50 nm),并用甩膜法制备了钛酸钡/双酚A聚碳酸酯（BT/PC)的复合薄膜。用XRD和TEM方法研究了复合薄膜的结构和性能。为了取得更好的电光效应，复合薄膜在一定温度下用高压针尖放电极化使得钛酸钡纳米晶粒取得高的一致取向性。通过测量复合薄膜和纯PC薄膜的温度－介电常数性质以及结合有效电场理论最优化了电场极化的条件。测量了不同纳米晶浓度掺杂的复合薄膜的电光系数。测量了极化前后的复合薄膜的投射率并且由此算出了极化前后的光学带隙。
BaTiO3/PC composite thin films were prepared by spin coating method. Ultra-fine BaTiO3 (BT) (~40-50 nm) nanocrystals with pure perovskite tetragonal phase were synthesized by hydrothermal method. The structure of BT nanocrystals and composite films were studied by means of XRD and TEM. The composite films were poled with a high electric field at a suitable temperature to yield a noncentrosymmetric arrangement and get better electro-optic properties. The poling condition under external electric field was optimized through the dielectric properties of BT and PC polymer and effective field intensity theory. The EO coefficients of different concentration of doped BT nanocrystals composite films were also evaluated. The orientation degree of nanocrystals in PC polymer was estimated by measuring the transparency spectra of unpoled and poled composite thin films.
黄苏、李爱东、沈智如、吴迪、刘文超、谭静、闵乃本、叶辉
物理学光电子技术材料科学
钛酸钡/双酚A聚碳酸酯复合薄膜，水热法，电光系数
BaTiO3/PC composite thin filmHydrothermal methodEO coefficients
黄苏,李爱东,沈智如,吴迪,刘文超,谭静,闵乃本,叶辉.BaTiO3/PC复合薄膜的制备和光电性质的研究[EB/OL].(2004-03-15)[2025-08-10].http://www.paper.edu.cn/releasepaper/content/200403-101.点此复制
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