Particle Aerosol Deposition and the Development of High Temperature Dielectric Ceramics

目标。基于碱土铌酸盐制备钨青铜晶体结构高温介质陶瓷的颗粒气溶胶沉积工艺研究。合成和分析一系列的掺杂成分，用电子显微镜表征微结构用x射线衍射表征晶体相含量表征介电性能将气溶胶沉积条件与沉积厚膜的结构和性能联系起来了解控制结构和性能的关键参数利用新兴知识设计一种工艺，使电介质具有稳定的相对介电常数和低介电损耗温度范围从-55度到250度和300度。

Aims. Investigation of a particle aerosol deposition manufacturing route to develop high temperature dielectric ceramics based on alkaline earth niobates with the tungsten bronze crystal structure.Objectives. Synthesise and analyse a range of compositions of doped, fully dense CBN by aerosol deposition Characterise microstructure using electron microscopy Characterise crystal phase content using X-ray diffraction Characterise dielectric propertiesd Correlate aerosol deposition conditions to structure and properties of the deposited thick films Understand the critical parameters controlling structure and properties Use the emerging knowledge to design a process whereby dielectrics can be produced with stable relative permittivity and low dielectric loss across the temperature range -55degreesC to 250degreesC and 300degreesC.