The solid solution of (x) Ba0. 7Ca0. 3TiO3-(1-x) BaZr0. 2Ti0. 8O3 is known to exhibit high
piezoelectric constants. Discrepancies in the reported phase transitions and structure
around room temperature, however, have complicated the understanding of the enhanced
properties. Rietveld refinement of high-resolution X-ray diffraction is employed here to
establish and refine the crystallographic structure at temperatures from− 100° C to 150° C for
x= 0.5. A combination of rhombohedral R3m and tetragonal P4mm is found to coexist at …

The solid solution of (x) Ba 0.7 Ca 0.3 TiO 3-(1-x) BaZr 0.2 Ti 0.8 O 3 is known to exhibit high
piezoelectric constants. Discrepancies in the reported phase transitions and structure
around room temperature, however, have complicated the understanding of the enhanced
properties. Rietveld refinement of high-resolution X-ray diffraction is employed here to
establish and refine the crystallographic structure at temperatures from− 100 C to 150 C for
x= 0.5. A combination of rhombohedral R3m and tetragonal P4mm is found to coexist at …