Achieving both large piezoelectric constant and low dielectric loss in BiScO3-PbTiO3–Bi(Mn2/3Sb1/3)O3 high-temperature piezoelectric ceramics

Yunyun Feng; Changhong Yang; Xiaoying Guo; Wei Sun; Wenxuan Wang; Xiujuan Lin; Shifeng Huang

doi:10.1142/S2010135X22500175

Abstract

BiScO₃–PbTiO₃ binary ceramics own both high Curie temperature and prominent piezoelectric properties, while the high dielectric loss needs to be reduced substantially for practical application especially at high temperatures. In this work, a ternary perovskite system of (1–

x

–

y

)BiScO₃–

y

PbTiO₃–

x

Bi(

{Mn}_{2 / 3}

{Sb}_{1 / 3}

)O₃ (BS–

y

PT–

x

BMS) with

x

= 0.005,

y

= 0.630–0.645 and

x

= 0.015,

y

= 0.625–0.640 was prepared by the traditional solid-state reaction method. The phase structure, microstructure, dielectric/piezoelectric/ferroelectric properties were studied. Among BS–

y

PT–

x

BMS ceramic series, the BS–0.630PT–0.015BMS at morphotropic phase boundary possesses the reduced dielectric loss factor (tan

δ

= 1.20%) and increased mechanical quality factor (

Q

_{m}

= 84), and maintains a high Curie temperature (

T_{C}

= 410

^{°}

C) and excellent piezoelectric properties (

d

_{33}

= 330 pC/N) simultaneously. Of particular importance, at elevated temperature of 200

^{°}

C, the value of tan

δ

is only increased to 1.59%. All these properties indicate that the BS–0.630PT–0.015BMS ceramic has great potential for application in high-temperature piezoelectric devices.BiScO₃–PbTiO₃ binary ceramics own both high Curie temperature and prominent piezoelectric properties, while the high dielectric loss needs to be reduced substantially for practical application especially at high temperatures. In this work, a ternary perovskite system of (1–

x

–

y