Microwave sintered sol–gel derived BaTiO3 and Ba0.95La0.05TiO3 ceramic samples for capacitor applications

Sol–gel derived BaTiO3 and Ba0.95La0.05TiO3 powders were calcined at 700 °C for 40 min and sintered at 1100 °C for 1 h in a microwave furnace to obtain single-phase perovskite ceramic samples. About 98% of the theoretical density was obtained in the sintered BT ceramic samples. Room temperature (RT) dielectric constant (εr) and dielectric loss (tan δ) at 1 kHz frequency of the BLT ceramic samples were found to be ~2220 and 0.005, respectively. High value of εr, low value of tan δ and negligible temperature coefficient of capacitance from RT to 60 °C suggested the suitability of BLT ceramic samples for multi-layer capacitor applications.