Pb(Yb1/2Nb1/2)O3-PbTiO3 ceramics at the morphotropic phase boundary (50:50) were sintered by conventional and reactive methods to ≥95% theoretical density and grain sizes <10 μm. Excess PbO, added to enhance the densification, resulted in PbO-based non-ferroelectric phases that degraded the electrical properties. Volatilization of excess PbO by annealing the samples after sintering resulted in dense, perovskite samples and excellent electrical properties. The best electrical properties, obtained via reactive sintering, were a remanent polarization, Pr, of 0.36 C/m2, a maximum dielectric constant of 31,000 (at the Tc = 371°C and 1 kHz), a piezoelectric charge coefficient, d33, of 508 pC/N, and an electromechanical coupling coefficient, k33, of 0.61.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Mechanics of Materials
- Electrical and Electronic Engineering
- Materials Chemistry