MgO-Y2O3透明陶瓷是目前最有发展潜力的一种新型中红外窗口材料，它具有优良的力学性能、抗热冲击性能和中红外透过性能。MgO-Y2O3红外透明陶瓷的烧结致密化行为和微观结构对其红外透过率有极大影响。本课题以溶胶凝胶-微波加热法合成MgO-Y2O3纳米粉体，采用微波烧结工艺制备MgO-Y2O3红外透明陶瓷。研究用作红外窗口材料的MgO-Y2O3红外透明陶瓷的微波烧结致密化过程和微观结构，探讨MgO-Y2O3红外透明陶瓷的微波烧结机理，找出烧结条件对微观结构和红外透过性能的相关性规律，探讨微波烧结与传统烧结机理的区别，解决MgO-Y2O3红外透明陶瓷微波烧结制备中的关键科学问题，为高性能中红外MgO-Y2O3窗口材料的制备和应用奠定科学基础。

MgO-Y2O3 infrared transparent ceramics have recently acquired a high degree of research interest for midwave infrared window materials due to their excellent mechanical properties, thermal shock resistance and infrared transmittance.?Sintering densification behavior and microstructure of MgO-Y2O3 infrared transparent ceramics have a great influence on the infrared transmittance. In this study, MgO-Y2O3 nanopowders are synthesized by sol-gel combined microwave heating technology, and MgO-Y2O3 infrared transparent ceramics are sintered by microwave sintering process. We will study the densification behavior, microstructure as well as microwave sintering mechanism of MgO-Y2O3 infrared transparent ceramics. Moreover, the effect of microwave sintering processing on microstructure and infrared transmittance, and the comparation of microwave sintering with conventional sintering processing will be investigated. The objectives of this project are to solve the key scientific problems related to the microwave sintering of MgO-Y2O3 infrared transparent ceramics, and to establish a science base for the preparation of high performance?MgO-Y2O3 midwave infrared window materias.