Pyroelectric and Electrostrictive Properties of (1 – <i>x</i> – <i>y</i> ) PZN · <i>x</i> BT · <i>y</i> PT Ceramic Solid Solutions

Abstract

The pyroelectric and electrostrictive properties of lead zinc niobate–lead titanate–barium titanate (PZN–BT–PT) ceramic solid solution were investigated. These properties of the (1 – x )PZN · x BT series were qualitatively explained with a composition fluctuation model. The pyroelectric depolarization temperatures of (1 – x – y )PZN · x BT · y PT ceramics were utilized to select compositions for room‐temperature electrostrictive applications. Among them, 0.85PZN · 0.10BT · 0.05PT ceramic with Q 11 = 0.018 m 4 / C 2 , Q 12 =−0.0085 m 4 /C 2 , s 2 at 25 kV/cm =−6.1 × 10 −4 , T max = 75°C at 1kHz, and T t = 27°C shows optimum properties for micropositioner applications.