Dielectric and pyroelectric properties of SrBi4Ti4O15-based ceramics for high-temperature applications

Sr (Sr, Ca, Ba)0.1Bi3.9Ti3.9(Ta, Nb)0.1O15 ceramics were prepared by a conventional sintering technique and the dielectric, piezoelectric and pyroelectric properties were investigated. Among these materials, Sr1.1Bi3.9Ti3.9Ta0.1O15 was found to have the highest Curie temperature, largest piezoelectric constant d33 and pyroelectric coefficient p. In addition, MnCO3 and La2O3 additives can further improve the piezoelectric and pyroelectric properties. The Sr1.1Bi3.9Ti3.9Ta0.1O15+0.5 wt.% MnCO3+0.2 wt.% La2O3 sample, in particular, has excellent pyroelectric properties in the temperature range of 100–200 °C, making this material very suitable for pyroelectric-derived applications.