Fiber textured Sr0.53Ba0.47Nb2O6 ceramics were reactively sintered to ≥95% of the theoretical density from a mixture of SrNb2O6 and BaNb2O6 powders. Texture in <001> was obtained by templated grain growth on <001>-oriented acicular KSr2Nb5O15 template particles. The most highly textured ceramics had a peak dielectric constant of 23, 600 (at Tc = 128°C), a remanent polarization (Pr) of 20.3 μC/cm2, a saturation polarization (Psat) of 24 μC/cm2 (69-96% of single crystal), and a piezoelectric charge coefficient (d33) of 84 pC/N (76-93% of single crystal). A model, correlating polarization with grain orientation, predicts that Pr increases sharply when a percolating grain network forms to transfer charge between elongated grains.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering