聚合物先驱体陶瓷具有突出的抗氧化/腐蚀性、高温热稳定性和多功能性，在航空航天、国防及能源等领域应用广泛，是目前国际研究的热点和重点。本项目拟以SiAlBCN为研究对象，通过控制化学合成、交联固化、低温热解及高温微波热处理等工艺参数，实现其微结构和性能的调控。研究重点为：（1）通过化学合成实现Al、B共掺及相关工艺参数调整，同时获得优越的抗氧化/腐蚀性和高温热稳定性以及一系列成分，电、介电性能的样品。（2）利用微波加热的选择性和即时性，调整工艺参数，实现对SiAlBCN陶瓷非晶基体和游离碳的不同步加热，了解单独一相结构演变规律及其对性能的影响。（3）实现外场（温度场和应力场）作用下SiAlBCN陶瓷电、介电性能测试，分析结构-性能关系。通过对结构演变规律、结构-性能关系及影响因素的深入、系统研究，阐明机理，为设计新型先驱体陶瓷，开发新型高温陶瓷传感器提供理论依据和技术指导。

Recently, polymer-derived ceramic becomes one of the most popular and important materials due to its unique properties of high oxidation & corrosion resistance, excellent high temperature stability & multifunctionality and widespread application in the fields of aerospace, national defense and energy generation. Polymer-derived SiAlBCN ceramic is selected as research system in this project. The microstructure and property modification will be carried out by tailoring the parameters of precursor synthesis, cross-linking, pyrolysis and high temperature microwave heat treatment. In this project, three significant issues are addressed: (1) Preceramic precursor synthesis with Al and B doping at the same time in order to get the unique properties mentioned above. (2) Due to the special features of chosen-heating and instant on and off, the amorphous matrix and free carbon of SiAlBCN ceramic can be heat up separately by varying microwave heating parameters. In this case, the structure evolution and properties related to either amorphous matrix or free carbon can be identified. (3) Investigation the electric and dielectric properties of SiAlBCN ceramic under high temperature and pressure and analysis the structure-properties relationship. The mechanism of structure evolution and structure-property relationship of SiAlBCN ceramic is proposed due to the deep and systemic study which is also valuable for designing new polymer-derived ceramic and developing new high temperature sensors.