A bismuth and lead oxide based perovskite ternary solid solution xBi(Zn1/2Ti1/2)O3 - yPbZrO3 - zPbTiO3 (xBZT - yPZ - zPT) was investigated as an attempt to develop a high TC ferroelectric material for piezoelectric sensor and actuator applications. A morphotropic phase boundary (MPB) between rhombohedral and tetragonal phases was determined through an XRD study on a pseudobinary line 0.1BZT - 0.9[xPT - (1 - x)PZ] for composition 0.1Bi(Zn1/2Ti 1/2)O3 - 0.5PbZrO3 - 0.4PbTiO3. Enhanced piezoelectric and ferroelectric activities were observed for MPB composition with dielectric constant εr′ ∼ 23,000 at Curie temperature (TC) ≈ 320 °C, remanent polarization (P r) = 35 μC/cm2, piezoelectric coefficient (d 33) = 300 pC/N, unipolar strain = 0.15%, and electromechanical coupling coefficient (kP) = 0.45.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering