High temperature properties of BiScO3–PbTiO3 piezoelectric ceramics

Abstract

Smart actuators and intelligent structures are sought after for aeronautical applications. As a result of high Curie temperature (430 °C) and piezoelectric coefficient (>200 pC/N), BiScO3–PbTiO3 (BS-PT) ceramics are prospective materials for high temperature actuators. This paper reports on the temperature dependent electrical, ferroelectric, and electromechanical properties of liquid phase sintered BS-PT ceramics. Compared to solid state sintered BS-PT, liquid phase sintered BS-PT with Bi2O3 showed improved electrical performance: (1) threefold reduction in loss tangent at elevated temperatures, (2) fivefold increase in dc resistivity at high electrical fields, and (3) 15% increase in high field piezoelectric coefficient. Hysteresis loops of the highly resistive ceramics were saturated and showed no major dependence on the magnitude and the frequency of the applied field. BS-PT ceramics exhibit depoling behavior at temperatures below (>350 °C) the Curie temperature (430 °C). Liquid phase sintering using excess Bi2O3 is shown to be a promising approach to produce superior BS-PT ceramics for high temperature actuators.

Point defect engineering of high temperature piezoelectric BiScO3–PbTiO3 for high power operation

“…These compounds are being investigated extensively as alternative to state-of-the-art Pb(Zr,Ti)O3 (PZT) for expanding the operation temperature of high sensitivity piezoelectric ceramics beyond 200 ºC, up to 400 ºC [7][8][9].…”

High temperature electronic properties of BaTiO3 – Bi(Zn1/2Ti1/2)O3 – BiInO3 for capacitor applications

“…The excellent performance of Bi-perovskites in solid solution with Pb-based perovskites were predicted and reported [2,3]. For example, PbTiO 3 -Bi(Zn 1/2 Ti 1/2 )O 3 [4][5][6], PbTiO 3 -Bi(Mg 1/2 Ti 1/2 )O 3 [7,8], PbTiO 3 -Bi(Ni 1/2 Ti 1/2 )O 3 [9], PbTiO 3 -BiScO 3 [10,11], and PbTiO 3 -BiInO 3 [12,13] compounds have been reported to exhibit a high Curie temperature (T C ), which is a great advantage for high temperature applications. These Biperovskites were also investigated in solid solutions with Pb-free ferroelectric materials such as BaTiO 3 .…”

Effects of sintering atmosphere on microstructure and electrical properties of BiScO3–PbTiO3 high-temperature piezoceramics

“…Recent studies were mostly focused on improving the electrical properties of BiScO 3 -based solid solutions through various strategies, such as fabricating fine-grain ceramics [8], creating excess PbO or Bi 2 O 3 [9] and doping some agents [10][11][12]. In these studies, in order to minimize the loss of Pb and Bi during sintering process, all samples were sintered in sealed crucibles filled with sacrificial powders.…”