کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7897739 | 1510127 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Anomalously large lattice strain contributions from rhombohedral phases in BiFeO3-based high-temperature piezoceramics estimated by means of in-situ synchrotron x-ray diffraction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Thermally-stable (0.75-x)BiFeO3-0.25PbTiO3-xBa(Zr0.25Ti0.75)O3 (0.1â¯â¤â¯xâ¯â¤â¯0.27) piezoelectric ceramics were reported to have excellent dielectric and electromechanical properties of d33â¼405 pC/N, kpâ¼46%, ε33T/ε0â¼1810, tanδâ¼3.1% and Tcâ¼421â¯Â°C close to tetragonal (T)-rhombohedral (R) morphotropic phase boundary. The dielectric measurement indicates that R ferroelectric phase is gradually transformed into relaxor ferroelectric across the phase boundary due to the substitution of BZT for BF. The transmission electron microscopy and convergent beam electron diffraction provide clear evidences that both the R-T phase coexistence and polar nanodomains contribute to enhanced piezoelectric properties at xâ¯=â¯0.19 through cooperatively facilitating polarization orientation. In combination with the macroscopic piezoelectric coefficient measurement, the quantitative analysis of synchrotron diffraction data under electric fields suggests that extremely large lattice strain contribution predominantly from R phases plus little extrinsic domain switching contribution should dominate the piezoelectric response of the xâ¯=â¯0.19 sample, mainly owing to both irreversible field-induced T to R phase transition and irreversible non-180° domain switching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 14, November 2018, Pages 4653-4658
Journal: Journal of the European Ceramic Society - Volume 38, Issue 14, November 2018, Pages 4653-4658
نویسندگان
Ruzhong Zuo, He Qi, Aiwen Xie, Donggeng Zheng,