Improved high q value of MgTiO3-CaTiO3 microwave dielectric ceramics at low sintering temperature

摘要: Abstract MgTiO 3 -based ceramics have been prepared with conventional solid-state route. With 5 mol% CaTiO addition, 0.95MgTiO -0.05CaTiO can give e r ∼20–21, Q×f values ∼56,000 (at 7 GHz) and a τ f value of ∼0 ppm/°C. However, sintering temperature still remained above 1400°C. Doping B 2 O (up to wt%) effectively promote the densification dielectric properties ceramics. It is found that be sintered at 1200°C due liquid phase effect addition observed by Scanning Electronic Microscopy. The on microwave microstructures are also investigated. For practical applications, wt% gives: ∼21.2, ∼62,000 8 GHz), ∼4 ppm/° C.