Li–Nb–Ti–O microwave dielectric ceramics

Microwave dielectric materials are used more and more widely in resonators, filters, integrated passive modules, etc., for the emerging wireless communications applications. The low sintering temperature together with excellent and tunable microwave dielectric properties of the M-phase Li–Nb–Ti–O ceramics stimulated much interest in searching new microwave materials in the Li2O–Nb2O5–TiO2 ternary system. In the past decade, a series of Li–Nb–Ti–O based microwave dielectric ceramics and low temperature co-fired ceramics have been developed. The present paper summarized the comprehensive work on the microstructure, microwave dielectric properties, and low temperature sintering of the Li–Nb–Ti–O ceramics. We expect to provide broad-spectrum information of these materials for readers to promote their applications in modern wireless communication technology.