RESEARCH PROGRESS OF BISMUTH-BASED MICROWAVE DIELECTRIC MATERIALS

Microwave dielectric ceramics with low-temperature firing have become a new trend in dielectric materials research, and are an important basic material for developing multilayer microwave components. Bismuth-based microwave dielectric materials have at-tracted wide attention because of their relatively low sintering temperature and excellent dielectric properties. In this paper, bismuth-based materials with different dielectric constants and their applications are reviewed. The effect of the chemical substitution of cations and oxide additives on the structures and dielectric properties of microwave dielectric materials for different material systems are analyzed.