旋磁钡铁氧体材料离子掺杂调控及低温烧结机理研究

In this research, in order to achieve the multifunctional and multilayer of microwave gyromagnetic ferrite devices, the ion regulation effect and low temperature co-fired system of gyromagnetic barium ferrites were investigated. The materials were not only process excellent gyromagnetic properties, but also could been sintered at low temperature. The effects on microstructure, coercivity, saturation magnetization and ferromagnetic resonance linewidth were investigated. The mechanism and effects of different property ions occupied different crystalline lattice sites were investigated. Meanwhile, the mechanisms of ion regulation effect and low temperature co-fired M-type barium ferrites were investigated. The wisdom of ion occupancy and liquid phase sintering could meet the requirement of multifunctional and multilayer of microwave system, and lay the foundation for microwave electronics devices manufacturing, which is the powerful combination of basic technological project and engineering application.

以实现微波旋磁铁氧体器件的功能多样化和片式小型化为研究目标，以旋磁M型钡铁氧体材料及其离子掺杂调控及低温烧结体系为主要研究对象，不仅保证了M型钡铁氧体的旋磁特性，同时也实现了低温烧结的目的。研究M型钡铁氧体材料离子掺杂调控对其微结构、矫顽力、饱和磁化强度以及铁磁共振线宽等参数的影响，解决不同性质离子在不同晶格占位中对性能的影响机理，同时研究离子掺杂调控M型钡铁氧体材料的低温烧结机理，将离子占位机理和液相传质烧结理论结合在一起，解决了微波旋磁集成系统中需要的功能多样化和低温烧结LTCC工艺技术，为微波电子器件的制造工艺技术奠定了基础，是将基础性的科学问题与工程应用中的基础技术问题的有力结合。

本项目以微波旋磁铁氧体器件的多功能化和片式小型化为目标，主要研究高频M型钡铁氧体材料的低温共烧技术和离子调控机理，突破低温烧结离子掺杂M型钡铁氧体的旋磁特性的技术瓶颈。从精细制粉到离子掺杂，研究了多种单离子的离子调控特性，对不同性质离子在不同晶格位置中的占位机理和性能变化进行了分析和总结；同时研究材料的液相-低温烧结机理，分析了液相传质理论。通过本课题，得到了性能优良的微波旋磁材料，解决了微波旋磁集成系统中需要的多功能化和低温烧结技术问题，奠定了微波器件制造工艺中的基础材料问题。