Pyroelectric and dielectric bolometer properties of Sr modified BaTiO3 ceramics

The pyroelectric and dielectric bolometer properties of Sr modified BaTiO₃ ceramics were investigated for thermal IR detector applications. The (Ba_1–x, Sr_x)TiO₃ solid solution ceramics have been prepared by adding 10–40 at % SrTiO₃ to BaTiO₃ and with different sintering conditions and under dc fields. The relationships of processing parameters, microstructures, dielectric/pyroelectric properties and dc fields are discussed. And the figures of merit are compared between pyroelectric-type and dielectric bolometer-type IR sensors based on the experimental results.