铁酸铋基多相复合材料高温电磁特性及微波响应机制研究

The study of microwave absorption materials with high-temperature and broadband characteristics is one of the most important research directions in the stealth technology field. In this project, bismuth ferrite will be as the material of study, and the preparation methods, structure, high-temperature electromagnetic properties and temperature-frequency dependences of the bismuth ferrite composites will be investigated systematically. The relations between the electromagnetic characteristics and the evolution of structure and electronic structure at high temperature will be obtained by analysis. We will demonstrate the evolutional law of high-temperature microwave absorption characteristics and microwave response mechanisms, and develop the methods of regulation and control of electromagnetic parameters, the fundamental theory and design methods of high-temperature broadband microwave absorption, thus achieve an innovation on the system of high-temperature microwave absorption materials. This study will provide new academic points and scientific ideas for high-temperature microwave response theory and material design, and will promote the development of high-temperature microwave absorption materials and stealth technology. Furthermore, this study contributes to the formation of new academic ideas and research methods, which features the integration of cross-disciplines and the innovation of the integration of the theory, methods and technology.

高温宽频吸波材料是隐身科学技术领域的重要研究方向之一。本项目以铁酸铋为对象，系统研究铁酸铋基多相复合材料制备、结构表征、高温电磁性能及其温频特性，分析高温结构/电子结构演变与高温电磁特性的关联，揭示高温吸波性能演变规律和高温微波响应机制，建立高温电磁参数调控方法，发展高温宽频微波吸收的基本理论和设计方法，实现高温吸波材料体系创新。本研究可为吸波材料高温微波响应理论提供新学术观点，为高温宽频吸波材料设计及其性能控制提供新思路，支撑高温吸波材料发展，将促进我国高温隐身科学技术进步。本项研究具有明显的学科交叉与综合特点，同时又具有突出的理论、方法和技术集成创新的实质性，有利于形成交叉创新的学术观点和研究方法。

高温宽频吸波材料是隐身科学技术领域的重要研究方向之一。本项目以铁酸铋为对象，系统研究了铁酸铋、掺杂铁酸铋、铁酸铋基多相复合的材料制备、结构表征、高温电磁性能及其温度和频率特性，分析了高温结构/电子结构演变与高温电磁特性的关联，揭示了高温吸波性能演变规律和高温微波响应机制，建立了高温电磁参数调控方法，发展了高温宽频微波吸收材料的基本理论和设计方法。本研究为吸波材料高温微波响应理论提供了新学术观点，为高温宽频吸波材料设计及其性能控制提供了新思路，支撑了高温吸波材料的发展，将促进我国高温隐身科学技术进步。本项目研究的成果具有明显的学科交叉与综合特点，同时又具有突出的理论、方法和技术集成创新的实质性，有利于形成交叉创新的学术观点和研究方法。