DIFFERENTIAL SCANNING CALORIMETRY INVESTIGATION OF PHASE TRANSITION IN BaZr_XTi_1-XO₃

ABSTRACT

Lead-free BaZr_xTi_1-xO₃ (x = 0; 0.025; 0.125) ceramics have been obtained by a conventional method. A single-phase perovskite structure of the ceramics was identified by the X-ray diffraction method. EDS analysis, performed for the individual grains of the tested sample, showed a good homogeneous distribution of all elements throughout the grains. The thermal behaviour of BaZr_xTi_1-xO₃ (x = 0; 0.025; 0.125) ceramics was studied using the Differential Scanning Calorimetry (DSC). Measurements showed the influence of Zr addition on the character of phase transition in the BaTiO₃ structure. The results were compared with these ones obtained for pure BaTiO₃.

Keywords:

• barium-zirconium titanate BaZr_xTi_1-xO₃ (BZT)
• structural properties
• dielectric properties
• DSC