Composition‐dependent microstructure and electrical property of (1−x)SBN‐xBNBT solid solutions.

In this study, (1−x)Sr0.75Ba0.25Nb2O6‐x[0.94Bi0.5Na0.5TiO3‐0.06BaTiO3] solid solution ceramics were prepared and investigated. The length‐diameter ratio of pillar‐like grain increased with increase in x, reaching maximum value of 10.5 at average length of 1.36 μm and diameter of 0.13 μm for x = 0.20. The maximum dielectric constant, temperature corresponding to the maximum dielectric constant, and saturated polarization decreased, respectively, from 507, 36°C, and 3.2 μC/cm2 for x = 0 to 365, −61°C, and 2.0 μC/cm2 fort x = 0.10, and then increased to 1167, 43°C, and 5.5 μC/cm2 for x = 0.20. These results indicate the competitive effects of B‐site Ti4+ and A‐site Ba2+ on ferroelectricity. [ABSTRACT FROM AUTHOR]