Abstract
Piezoelectric ceramics with TC < 500 °C were projected in the perovskite BiInO3–PbTiO3 (BIPT) system based on their low tolerance factor (∼0.884). However, a stable perovskite phase could be synthesized only when the PbTiO3 (PT) content was greater than 75%. Furthermore, the large tetragonality (c/a < 1.08) and low electrical resistivity made the ceramics difficult to pole. Niobium-modified BIPT ceramics with PT contents of 80% and 85% were found to possess significantly lower dielectric loss at elevated temperatures, making it possible to polarize the materials. Piezoelectric properties were measured for a BIPT85–1.5 mol% Nb composition with a Curie temperature of 542 °C; the longitudinal piezoelectric coefficient and coercive field were found to be 60 pC/N and 125 kV/cm, respectively.
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Zhang, S., Xia, R., Randall, C.A. et al. Dielectric and piezoelectric properties of niobium-modified BiInO3–PbTiO3 perovskite ceramics with high Curie temperatures. Journal of Materials Research 20, 2067–2071 (2005). https://doi.org/10.1557/JMR.2005.0254
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DOI: https://doi.org/10.1557/JMR.2005.0254