Phase Stability and Ferroelectric Properties of Lead Strontium Zirconate Titanate Ceramics |
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Authors: | Yongjian Yu Jinbiao Tu Raj N. Singh |
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Affiliation: | Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221–0012 |
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Abstract: | The effect of compositional modifications on the field-induced phase-transition behavior and dielectric properties of strontium-doped lead zirconate titanate (PZT) ceramics was studied. PZT compositions with different strontium and titanium contents, within the general formula Pb1– x Sr x (Zr1– y Ti y )O3 and located in the tetragonal antiferroelectric (AFE) and rhombohedral ferroelectric (FE) phase fields were prepared by tape casting and sintering. X-ray diffraction and polarization measurements were used to locate compositions suitable for investigation of the field-induced AFE–FE phase transition. The results indicated that a higher Sr2+ content decreased the polarization and hysteresis and increased the switching field; a lower Ti4+ content decreased the polarization and increased the switching field and hysteresis. A high room-temperature dielectric constant was obtained for compositions near the phase boundary. These results suggest that a combination of both A -site and B -site modifications can be used to tailor ferroelectric properties, such as the switching field and hysteresis, of these strontium-doped PZTs displaying a field-induced AFE–FE phase transition. |
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Keywords: | ferroelectricity/ferroelectric materials lead zirconate titanate tape casting |
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