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第六届全国电介质物理学术会议和第二届全国工程电介质学术会议于1991年10月21—25日在西安联合召开.会议由西安交通大学承办.参加会议的代表共131人,来自全国各地的大学、研究所和工厂等50余个单位. 会上共交流论文119篇(已汇编成论文集一本),内容涉及电众质理论、单晶、多晶(陶瓷)、聚合物薄膜、铁电液晶、生物电介质、电介质性质测试技术、电介质的工程应用等方面.会上作了七篇大会报告,着重介绍了功能陶瓷、工程电介质、驻极体、铁电液晶等的最新发展动向,对学科前沿领域进行了广泛交流.引起了与会者很大的兴趣.与会者还参观了西安交通… 相似文献
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电致发光材料在大屏幕平板显示和移动通讯器件方面有着极大的优越性。Ⅱ-Ⅵ族无机半导体、金属有机化合物及共轭聚合物等都是电致发光材料。由半导体纳米晶体和电致发光聚合物组成的双发光器件中,纳米半导体的发光不仅可以通过掺杂及形成核壳结构来加以调节,而且受到其复合体系类型、纳晶含量、外加电压等因素制约;而无机半导体的高电荷输运特性也将影响聚合物发光层的效率。同时,利用无机纳米半导体的光导特性,这种复合体系也可以制成光导与电致发光双功能器件,且其发光效率可有较大幅度提高。 相似文献
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本文采用溶胶-凝胶法在Pt(111)/TiO2/SiO2/Si衬底上制备了(Ba0.6Sr0.4)1-xCaxTiO3(BSCT)(x=0,0.1,0.2,0.3,0.4)薄膜.XRD及SEM结果表明表明,薄膜结晶良好,形成单一的钙钛矿结构,没有明显的裂缝.薄膜厚度大约为500nm.从介电常数和直流偏压电场的关系曲线上并没有滞后现象,这说明BSCT薄膜处于顺电相.随着x的增加,薄膜的介电常数、介电损耗和调谐率都有所下降,而优值有所提高.J-V特性表明Ca的加入显著降低了薄膜的漏电流. 相似文献
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DIELECTRIC AND PYROELECTRIC CHARACTERISTICS AND FERROELECTRIC SOFT MODES IN PbTiO3 POLYCRYSTALS DOPED WITH Ca2+ 下载免费PDF全文
The effects of Ca2+ ions on the structure and dielectric and pyroelectric characteristics of PbTiO3 polycrystals were investigated. With increasing content of Ca, a decrease in tetragonal axial ratio (c/a) was observed as a consequence of shrinkage of the lattice parameter c. The dielectric constant and pyroelectric coefficient increase and Curie temperature (TC) shifts toward lower temperature with increasing content of Ca. The theory of ferroelectric soft mode has been developed to illuminate the relationship between the structure and properties of the polycrystal. 相似文献
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DIELECTRIC AND PYROELECTRIC CHARACTERISTICS AND FERROELECTRIC SOFT MODES IN PbTiO3 POLYCRYSTALS DOPED WITH Ca2+ 下载免费PDF全文
The effects of Ca2+ ions on the structure and dielectric and pyroelectric characteristics of PbTiO3 polycrystals were investigated. With increasing content of Ca, a decrease in tetragonal axial ratio (c/a) was observed as a consequence of shrinkage of the lattice parameter c. The dielectric constant and pyroelectric coefficient increase and Curie temperature (TC) shifts toward lower temperature with increasing content of Ca. The theory of ferroelectric soft mode has been developed to illuminate the relationship between the structure and properties of the polycrystal. 相似文献
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