Novel Temperature-Stable MgTi0.95Sn0.05O3-Based Microwave Dielectric Ceramics

Novel temperature-stable MgTi0.95Sn0.05O3-based microwave dielectric ceramics were fabricated by a solid-state reaction method to develop a microwave device for applying in 5 G. SrTiO3 was used to improve the temperature stability of MgTi0.95Sn0.05O3-based ceramics. The sintered ceramics are composed of MgTiO3, Mg2TiO4, and SrTiO3 phases. With an increase in x, the content of the SrTiO3 phase increased and the content of MgTiO3 and Mg2TiO4 decreased. At the same time, the microstructures and microwave dielectric characteristics of MgTi0.95Sn0.05O3-based ceramics strongly depended on SrTiO3. 0.85MgTi0.95Sn0.05O3-0.15SrTiO3-4wt%LiF ceramics displayed a balance dielectric properties of εr = 19.2, Q × f = 8833 GHz, τf = 3.69 ppm/°C.