| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1643050 | Materials Letters | 2015 | 4 Pages |
•Effect of LaAlO3 addition on dielectric properties of 0.95MgTiO3–0.05CaTiO3 was studied.•Effect of LaAlO3 addition on phase compositions and sintering behavior of 0.95MgTiO3–0.05CaTiO3was discussed.•With 1.0 mol % LaAlO3 doped, the sintering temperature of 0.95MgTiO3–0.05CaTiO3 ceramics can be lowered to 1225 °C with excellent dielectric properties.•Densification was used to analyze the dielectric properties.•The relations between microstructure and microwave dielectric properties were investigated.
The microstructures and microwave dielectric properties of 0.95MgTiO3–0.05CaTiO3 ceramics with 1.0 mol % LaAlO3 addition, prepared by the conventional solid-state reaction route, were investigated. The sintering temperature of 1.0 mol % LaAlO3-doped 0.95MgTiO3–0.05CaTiO3 ceramics can be lowered to 1225 °C. Microwave dielectric properties were found to strongly correlate with the sintering temperature. The Q×f value increased with sintering temperature up to 1225 °C and decreased thereafter. The decrease in Q×f value was coincident with the observed abnormal grain growth. A maximum Q×f of 73300 GHz associated with an εr of 21.68 and a τf of -2.22×10−6/°C was achieved for the samples sintered at 1225 °C/4 h.
