Excellent thermal stability and aging behaviors in BiFeO3‐BaTiO3 piezoelectric ceramics with rhombohedral phase

• DOI: 10.1111/jace.16755
• Publication Date: 2019-08-21T18:03:01Z
• Authors: Jianguo Chen; Jinrong Cheng; Jian Guo; Zhenxiang Cheng; Jianli Wang; Hongbo Liu; Shujun Zhang
• Keywords: Phase boundary; Thermal Stability; Atmospheric temperature range

Abstract BiFeO 3 ‐BaTiO (BF‐BT) solid solutions are lead‐free candidates for high‐temperature piezoelectric applications. BF‐BT ceramics with compositions near the morphotropic phase boundary (MPB) separating rhombohedral (R) and pseudo‐cubic (PC) phases were fabricated by conventional high temperature sintering method, their thermal stability aging properties studied in detail. show much better than those or coexistence of PC R phases. The degradation rates on order 1% 1.2% per decade, respectively. X‐ray diffraction results reveal that domain state poled is stable up to its Curie temperature, which responsible stability. Rayleigh analysis shows low rate attributed wall contribution overall response. indicate potential sensor transducer applications over a broad range.