Abstract
The displacive phase transition in BaxSr1-xTiO3 (BST) ceramic due to the mole fraction differences was investigated using x-ray diffraction assisted by Rietveld analysis. Detailed Rietveld analysis showed that BST undergoes a structural phase transformation from cubic to tetragonal phase. Average crystallite size and microstrain present in the powders were studied using the Wilson and Debye–Scherrer equation. The crystal structure of samples was refined by the Rietveld method, and an expansion on the unit cell parameters was determined. These analyses revealed an increment in the unit cell strain and an increase in the crystallite size when the mole fraction was increased.
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