کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886952 | 1509788 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Large strain of temperature insensitive in (1-x)(0.94Bi0.5Na0.5TiO3-0.06BaTiO3) -xSr0.7La0.2TiO3 lead-free ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Novel (1-x)(0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-xSr0.7La0.2TiO3 ternary lead-free ceramics (BNBT-xSL, xâ¯=â¯0.00-0.08) were fabricated by the widely used solid-state sintering technique. The crystal phase, microstructure, dielectric relaxation, piezoelectric, and electromechanical properties of each composition were systematically analyzed. It is found that the addition of SL has little effect on the crystal phase and grain morphology, but it can remarkably improved the relaxation property of the ceramic sample and gave rise to favourable dielectric properties in a wide range of temperatures. In addition, as the SL content increases, the ferroelectric to relaxor temperature (TF-R) is adjusted to below ambient temperature. More importantly, the decay of ferroelectric phase resulted in a significant increase in strain value: the large strain of 0.5% with normalized strain of 625â¯pm/V was obtained at 80kv/cm and xâ¯=â¯0.04. Finally, the composition exhibited high strain of temperature insensitivity range from room temperature to 100â¯Â°C, the strain value remained above 0.4% and kept within 5%. The results are due to the coexistence of rhombohedral polar-nanoregions (PNRs) and tetragonal PNRs during the relaxor region. This result is of great importance to the developments of temperature-insensitive strain sensors and actuators.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 10, July 2018, Pages 11331-11339
Journal: Ceramics International - Volume 44, Issue 10, July 2018, Pages 11331-11339
نویسندگان
Nianshun Zhao, Huiqing Fan, Jiangwei Ma, Xiaohu Ren, Yungui Shi, Yunyan Zhou,