کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898702 | 1510139 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Coexistence of three ferroelectric phases and enhanced piezoelectric properties in BaTiO3-CaHfO3 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
Perovskite ferroelectrics possess the fascinating piezoelectric properties near a morphotropic phase boundary, attributing to a low energy barrier that the results in structural instability and easy polarization rotation. In this work, a new lead-free system of (1-x)BaTiO3-xCaHfO3 was designed, and characterized by a coexistence of ferroelectric rhombohedral-orthorhombic-tetragonal (R-O-T) phases. With the increase amount of CaHfO3 (x), a stable coexistence region of three ferroelectric phases (R-O-T) exists at 0.06 â¤Â x â¤Â 0.08. Both large piezoelectric coefficient (d33â¼400 pC/N), inverse piezoelectric coefficient (d33*â¼547 pm/V) and planar electromechanical coupling factor (kpâ¼58.2%) can be achieved for the composition with x = 0.08 near the coexistence of three ferroelectric phases. Our results show that the materials with the composition located at a region where the three ferroelectric R-O-T phases coexist would have the lowest energy barrier and thus greatly promote the polarization rotation, resulting in a strong piezoelectric response.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 2, February 2018, Pages 557-566
Journal: Journal of the European Ceramic Society - Volume 38, Issue 2, February 2018, Pages 557-566
نویسندگان
Yang Yang, Yibei Zhou, Juan Ren, Qiaoji Zheng, Kwok Ho Lam, Dunmin Lin,