硼酸盐铁电材料的合成以及性质研究

发布时间：2018-05-27 06:25

本文选题：硼酸盐 + 醋酸盐　；参考：《吉林大学》2015年硕士论文

【摘要】：铁电化合物是一类具备介电，亚铁电和压电的特殊材料。它们可以通过电场翻转而改变自发电极化方向，区别于其他物质。所有的铁电体同时显示热电性，压电性，二次谐波性质（SHG).含硼材料已被认为是最有希望具有这种应用的物质。在本论文的第二章中，作者利用水热合成方法，制备出了具有正交结构的硼酸盐[Ni(en)3][B5O6(OH)4][CH3COO]。该化合物属于Pbma空间群，通过无机[B5O6(OH)4]-和有机[CH3COO]-阴离子共同构建的化合物。在这项工作中，，我们提出的三维超分子开放框架包括无机硼酸盐阴离子和有机酸阴离子，结构中存在由[B5O6(OH)4]-单元和有机[CH3COO]-阴离子通过氢键沿不同的方向形成两个螺旋链。这项工作提供了基于无机单元和有机物质杂化合成超分子开放框架的新方法。在论文的第三章中对Pb6B12O21(OH)6进行了介绍，重点介绍了硼酸铅的铁电性以及相应的实验研究论述。本论文主要致力于制备新型的单相铁电材料，通过直接的制备方法实现了硼化物组成元素与金属元素结构之间的最佳结合，探索构建出具有更优异性能的铁电体。
[Abstract]:Ferroelectric compounds are special materials with dielectric, ferroelectric and piezoelectric properties. They can change the direction of spontaneous polarization by flipping the electric field, which distinguishes them from other substances. All ferroelectrics show thermoelectric, piezoelectric and second harmonic properties at the same time. Boron-containing materials are considered to be the most promising materials for such applications. In the second chapter of this thesis, the borate [Ni(en)3] [B5O6(OH)4] [CH3COO] with orthogonal structure was prepared by hydrothermal synthesis. The compound belongs to Pbma space group and is constructed by inorganic [B5O6(OH)4]-and organic [CH3COO]-anions. In this work, we propose a three-dimensional supramolecular open framework consisting of inorganic borate anions and organic acid anions, in which there are two helical chains formed by [B5O6(OH)4] -unit and organic [CH3COO] -anions through hydrogen bonds in different directions. This work provides a new method for the synthesis of supramolecular open frames based on inorganic units and organic matter hybrids. In the third chapter, Pb6B12O21(OH)6 is introduced, especially the ferroelectric property of lead borate and the corresponding experimental research. This thesis is mainly devoted to the preparation of new single-phase ferroelectric materials. The best combination of boride elements and metal elements is realized by the direct preparation method, and the ferroelectrics with better properties are explored and constructed.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ128

【共引文献】