作为一种重要的电荷有序现象，氧空位有序诱导的反常介电弛豫和弛豫铁电行为等新奇介电现象，带来了诸如，氧空位有序与这些介电现象是如何关联的？如何调控氧空位有序？等一系列重要的科学问题。为回答这些科学问题，本项立足已有的研究基础，选择这两种介电现象作为切入点，综合利用介电谱、Raman谱、直流电导谱、环境扫描探针显微镜测量、DSC测量、TSDC测量、高温同步辐射劳厄衍射等技术手段，并结合理论计算，力图获得氧化物材料中氧空位在高温下的形成和演化信息，深化对氧空位高温迁移行为的理解，建立相关的物性理论；弄清氧空位有序与这些新奇介电现象之间关联的物理本质；掌握氧空位有序随外部因素（电场、温度、热处理等）变化的规律，利用这些因素来调控氧空位有序以调控这两种介电现象；同时，积极探索与氧空位有序相关的其他物理效应。本项目的成功实施，有望极大地丰富电介质物理，为探索新的介电功能材料奠定基础和提供理论指

Oxygen-vacancy ordering, as one of the important forms of charge-ordering, not only leads to exotic dielectric phenomena like abnormal dielectric relaxation and relaxor behavior, but also creates a lots of open scientific questions, such as, what is the physics of the co-relationship between these dielectric phenomena and the oxygen-vacancy ordering? How to control the oxygen-vacancy ordering? To answer these questions, the project will be based on our previous research work and start from the exotic dielectric phenomena. Comprehensive utilization the techniques of the dielectric spectra, Raman spectra, dc conductivity, environmental scanning probe microscope measurements, DSC and TSDC measurements, high-temperature synchrotron Laue x-ray diffraction measurements, and in conjunction with first-principle calculations, the project aims at the following objectives: ..1) obtaining the information of formation and evolution for oxygen vacancies at high temperatures，understanding the high-temperature transport behavior of oxygen vacancies in oxides, and finally establishing physical model to describe these phenomena;..2) clearly understood the physical nature of the co-relationship between these dielectric phenomena and the oxygen-vacancy ordering...3) controlling and adjusting the oxygen-vacancy ordering in terms of external factors (such as electric field, temperature, and thermal treatments); and ..4) explore new physical effects associated with the oxygen-vacancy ordering...The achievements of this project will greatly expand the knowledge of dielectric physics, contribute to exploring new dielectric functional materials.