Intergrowth Structures with Intrinsic Oxygen Vacancies: A New Class of Oxygen Ion Conductors

本文研究了一类具有本征氧离子空位的新型氧离子导体。该材料由基于Aurivillius相的结构组成，其钙钛矿区被含有固有氧空位的brownmillerite样结构所取代。这些材料将通过复杂阻抗谱、x射线衍射和差热分析进行表征。所提出的工作将导致制备一类新的氧离子导体，并将导致更好地理解影响活化能和氧离子电导率大小的因素。这些材料可以成为燃料电池的组件或用于空气分离技术。

This research is concerned with the investigation of a new class of oxygen ion conductors having intrinsic oxygen ion vacancies. The materials consist of structures based on the Aurivillius phases that have their perovskitic region substituted with brownmillerite- like structures containing intrinsic oxygen vacancies. The materials will be characterized by complex impedance spectroscopy, x-ray diffraction, and differential thermal analysis. The proposed work will bead to the preparation of a new class of oxygen ion conductors, and will result in a better understanding of factors affecting the activation energy and the magnitude of the oxygen ion conductivity. These materials can become components of fuel cells or be utilized in air separation technologies.