The microwave dielectric properties and microstructure of the two-phase (Mg0.95Zn0.05)TiO3-CaTiO3 ceramic system were investigated. Dielectric properties of (Mg0.95Zn0.05)TiO3 ceramics could be effectively promoted by adding CaTiO3 to the specimen. At 1300 °C, 0.95(Mg0.95Zn0.05)TiO3-0.05CaTiO3 ceramic possesses good combination of microwave dielectric properties; a dielectric constant εr of ∼ 20.4, a Q × f value of ∼ 109,300 GHz (at 10 GHz), and a τf value of ∼ - 12.42 ppm/°C. The τf value is strongly correlated to the compositions and can be controlled through the compositional ratio. With x = 0.07, a dielectric constant εr of ∼ 22.6, a Q × f value of ∼ 93,200 GHz (at 10 GHz), and a τf value of ∼ - 2.62 ppm/°C was obtained for 0.93(Mg0.95Zn0.05)TiO3-0.07CaTiO3 ceramic sintered at 1300 °C for 4 h.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering