Bi‐Tunable Dielectric Constant of Antiferroelectric PZT Ceramics Under DC Electric Field

The dielectric properties of ( Pb 0.85 Ba 0.11 La 0.03 )( Zr 0.76 Sn 0.20 Ti 0.04 ) ( PLZST – B 11) composite ceramics have been investigated systematically. The characteristic of PLZST – B 11 was that it demonstrated antiferroelectricity. The dielectric constant increased, then decreased sharply with increasing DC electric field, and a low loss also was obtained under DC electric fields (≤40 kV/cm). The low loss (tan δ ~0.003) and the highest tunability (~65%) were obtained for the PLZST – B 11 ceramics around 50°C, indicating that it is a promising candidate for bi‐tunable materials nearby room temperature. The dielectric properties of PLZST – B 11 composites under a DC bias field can be useful for the design of devices and practical applications.