Fabrication of Perovskite Barium Titanate Ceramics Using the Combustion Route

The phase formation and microstructure of barium titanate (BT) perovskite fabricated using the combustion route was observed. (CO(NH2)(2)) was used as a fuel to decrease the reaction temperature. Pure perovskite BT powders were obtained at calcination temperatures above 1200 degrees C. The a parameter decreased while the c parameter increased with increasing calcination temperatures. The average particle size increased from 90 to 590 nm with an increase of calcination temperature. The pure tetragonal perovskite structures were found in all BT ceramics. The densest of the BT ceramics were obtained with a sintering temperature of 1300 degrees C. The dielectric constant at room temperature was also observed.