Lead-free piezoceramic with the composition of 0.89BaTiO₃-0.11BaSnO₃ (BT-11BS) was prepared by solid-state reaction followed by conventional sintering achieving nearly full density. The influence of sintering temperature on electrical properties were thoroughly investigated, implying a significant role in achieving best properties, which were obtained between 1420 and 1440 °C.

The addition of SnO₂ in BaTiO₃ solid solution promoted grain growth, eventually resulting in the grain sizes between 145 and 216 μm. An ultra-high dielectric permittivity >5.0 × 104 and related dielectric loss of 3.1 % at ~40 °C was achieved.

A high value of quasi-static piezoelectric constant (d33) of 693 pC/N and the converse piezoelectric constant (denoted as d33*) reached a value of up to 831 pm/V in the frequency range between 10 and 110 Hz. The transmittance of ~25 % in the visible region and ~40 % in the infrared region together with good electromechanical properties showcasing a unique combination for this material.

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