High strain in (Bi1/2Na1/2)0.935Ba0.065TiO3–Sr3FeNb2O9 lead-free ceramics with giant piezoresponse

作者: Renfei Cheng , Chunmei Wang , Zhijun Xu , Ruiqing Chu , Jigong Hao

DOI: 10.1039/C5RA17781B

关键词:

摘要: The structure, electric field-induced strain (EFIS), polarization and piezoelectric response of lead-free Sr3FeNb2O9-modified (Bi1/2Na1/2)0.935Ba0.065TiO3 (BNBT–xSFN, with x = 0–0.012) ceramics were investigated. XRD patterns show that all compositions have a pure perovskite structure SFN effectively diffused into the BNBT lattice during sintering to form solid solution. A large EFIS 0.35% was obtained at critical composition 0.009 which corresponds normalized (Smax/Emax) 583 pm V−1. maximum value constant (254 pC N−1) for 0.006. These results our research can benefit developments Bi1/2Na1/2TiO3 widen their range applications.

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