项目名称: 非中心对称配合物的铁电、压电与介电
项目编号: No.21261024
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 梅光泉
作者单位: 宜春学院
项目金额: 50万元
中文摘要: 铁电材料被广泛运用于无线电通讯信号处理设备、高频超声波医疗成象及快存速取的设备中 ;压电作为与军事、国防与人们日常生活息息相关的性质;而介电材料在现实生活中作为电容器的应用更是不言而喻。铁电的材料总是具有压电,铁电材料总是展现有趣的介电性质。正因为如此,铁电、压电与介电三者密切的联系在一起,出现在我们生活的方方面面。配合物通过引入非中心对称的有机配体与中心金属离子配位很好的诱导配合物结晶在非中心对称或手性的空间群特别是极性的点群中,为进一步研究物质的铁电性质提供条件,同时针对铁电体相对应的有趣介电性质和强压电性质,该种极性配合物的压电和介电性质研究就变得更有意义。同时由非中心对称带来的化合物中正、负离子间距离及其收缩性大对应的良好压电性质、介电强各向异性,介电对客体分子的强感应性以及配合物易导入的"多铁性"都将成为非中心配合物研究的亮点。
中文关键词: 非中心对称;有机-无机杂化;介电;相变;倍频效应
英文摘要: Ferroelectric materials are widely used in radio communications, signal processing equipment, high-frequency ultrasonic medical imaging, and etc.; piezoelectric relates to the military, national defense and people's daily lives; dielectric material has been applied in capacitors in our daily lives. Ferroelectric materials are always piezoelectric, and ferroelectric materials always show interesting dielectric properties. Ferroelectric, piezoelectric and dielectric are closely linked and appear in our lives together.Non-centrosymmetric coordination compounds introduced by non-centrosymmetric or twisty organic ligands will show interesting dielectric properties, strong piezoelectric properties as well as ferroelectric. Piezoelectric and dielectric properties of the polar complexes may become more meaningful. The long distance and shrinkage between caion and anion result in good piezoelectric properties, the strong anisotropy of the dielectric, and multiferroic in the non-centerosymmetric complexes.
英文关键词: noncentrosymmetric;organic?inorganic hybrid;dielectric;phase transition;second harmonic generation