Dielectric and piezoelectric properties of niobium-modified BiInO3-PbTiO3 perovskite ceramics with high Curie temperatures

Shujun Zhang, Ru Xia, Clive A. Randall, Thomas R. Shrout, Runrun Duan, Robert F. Speyer

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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.

Original languageEnglish (US)
Pages (from-to)2067-2071
Number of pages5
JournalJournal of Materials Research
Issue number8
StatePublished - Aug 2005

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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