X-ray diffraction measurement and equation of state for piezoelectric Pb(Zr1−xTix)O3 (x = 0.1–0.8) under static compression

• Published in: Current applied physics Vol. 11; no. 4; pp. 1024 - 1030
• Main Authors: Ko, Y H, Kim, K J, Cho, K H, Seo, C E
• Format: Journal Article
• Language: English
• Published: 01.07.2011
• Subjects: Compressing; Diffraction; Equations of state; Phase diagrams; Phase transformations; Piezoelectricity; Pressure; Synchrotron radiation
• ISSN: 1567-1739
• DOI: 10.1016/j.cap.2011.01.023

XRD patterns of Pb(Zr1-xTix)O3 (x = 0.1-0.8) were measured at pressures up to about 35 GPa at room temperature using synchrotron radiation. In order to refine the crystal structure, Rietveld analysis was performed. The structure of Pb(Zr1-xTix)O3 (x = 0.5-0.8) is tetragonal in space group P4mm at ambient pressure and is transformed into a cubic phase in space group Pmbar3m at about 7.5 GPa (x = 0.8), about 7.9 GPa (x = 0.6), and about 4.1 GPa (x = 0.5) respectively. The structure of Pb(Zr1-xTix)O3 (x = 0.1-0.4) is rhombohedral in space group R3c at ambient pressure. No pressure-induced phase transition for Pb(Zr1-xTix)O3 (x = 0.1-0.4) was seen over the pressure range studied. The Birch-Murnaghan equation of state fit to the experimental data was not only measured for Pb(Zr1-xTix)O3 (x = 0.1-0.8) but also the pressure phase diagram of PbTiO3-PbZrO3 system at 300 K is suggested.