Optimization of the Electrical and Dielectric Properties of Hydrogen-Bonded Solids

9902882本项目旨在了解碱和碱土固体酸性硫酸盐、硒酸盐和磷酸盐的电学性质和相变的结构和化学基础。由于这些化合物存在多种结构类型，它们都表现出不同程度和类型的氢键，而且它们可以从水溶液中获得大的单晶，因此这些体系将成为研究质子电导和铁电相变的优秀模型化合物。将使用的表征工具包括用于结构研究的X射线和中子衍射，以及红外、热分析、电导率和介电测量。旨在优化和了解超质子导体基本行为的%结构-性质研究与许多材料应用领域直接相关，包括氢和水传感器、燃料和蒸汽电池以及高能量密度电池。此外，铁电材料和相关的压电性和电光材料被广泛用于从压力传感器到光学快门和调制器的广泛的电子设备中。

9902882SossinaThis project aims to understand the structural and chemical basis for the electrical properties and phase transitions in alkali and alkaline earth solid acid sulfates, selenates, and phosphates. Because there exist numerous structure types of these compounds, all exhibiting varying extent and type of hydrogen bonding, and because they can be obtained as large single crystals from aqueous solutions, the systems will serve as excellent model compounds for the study of proton conductivity and ferroelectric phase transitions. Characterization tools to be used include x-ray and neutron diffraction for structural studies, together infrared, thermal analysis, conductivity and dielectric measurements.%%%Structure-property studies aimed at optimizing and understanding the fundamental behavior of superprotonic conductors are directly related to a number of materials applications areas that include hydrogen and water sensors, fuel and steam cells, and high energy density batteries. Also, ferroelectrics and related piezoelectrics and electro-optical materials, are used in a wide range of electronic devices from pressure sensors to optical shutters and modulators.