BNT‐based relaxor/ferroelectric systems: Improved field‐induced strain property in the layered composite ceramics

作者：Ding Yuwei; Liu Zhiyong; Xie Bing; Wang Fang; Guo Kun; Mao Pu; Liang Bingliang; Lu Jinshan

来源：Journal of the American Ceramic Society, 2022, 106(2).

• BNT‐based ceramics
• composite ceramics
• field‐induced stain
• relaxor ferroelectric

Both high strain and low driving electric‐field are important characteristics of the piezoelectric actuators for industrial applications, but they are difficult to achieve together in a single material system. In this work, the layered and inlay‐onlay structures of relaxor/ferroelectric composites were prepared by selecting relaxor phase (0.94Bi0.5(Na0.82K0.18)0.5TiO3‐0.06NaNbO3, BNKT‐6NN) and ferroelectric phase (0.9Bi0.5Na0.5TiO3‐0.1Bi0.2Sr0.7TiO3, BNT‐10BST) with the volume ratio of 1:1. By comparing the field‐induced strains under same electric‐field, the S33 of the BNKT‐6NN/BNT‐10BST layered composites (0.17%) was greater than that of the inlay‐onlay composites (0.08%) and exhibited excellent temperature stability. The superiority in field‐induced strain for the layered composite ceramic was originated from the inhomogeneous distribution of internal electric‐field...

• 单位
  南昌航空大学