Ferroelectric and piezoelectric properties of (Ba0.7Ca0.3)(Ti1−xSnx)O3 lead-free ceramics

2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS) Pub Date : 2015-03-07 DOI:10.1109/ISPTS.2015.7220071

Bharat G. Baraskar, S. P. Kharat, S. G. Kakade, R. Kambale, Y. D. Kolekar, S. Wada

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Abstract

The ferroelectric and piezoelectric properties of Sn⁴⁺ modified (Ba_0.7Ca_0.3)(Ti_1-xSn_x)O₃, (with x = 0.000 to 0.100 in steps of 0.025) lead free electroceramics were investigated. With Sn⁴⁺ substitution, a structural phase transition from pure tetragonal to pseudo-cubic structure has been observed; which strongly influence the ferroelectric/ piezoelectric nature of the samples. At room temperature, all the samples exhibit typical polarization-electric field hysteresis as well as field induced strain butterfly loop which confirms the ferroelectric and piezoelectric nature. As Sn⁴⁺ content increases, the ferroelectric properties seems to be suppressed while the piezoelectric properties gets improved up to x = 0.075 and then decreased. Moderately high remanent polarization (P_r) and low coercive field (E_c) were observed for all compositions, which may be essential for storage and switching applications.

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(Ba0.7Ca0.3)(Ti1−xSnx)O3无铅陶瓷的铁电和压电性能

研究了Sn4+改性(Ba0.7Ca0.3)(Ti1-xSnx)O3(步骤为0.025,x = 0.000 ~ 0.100)无铅电陶瓷的铁电性能和压电性能。Sn4+取代后，结构相变由纯四方结构转变为伪立方结构;这强烈地影响了样品的铁电/压电性质。在室温下，所有样品都表现出典型的极化电场滞后和场致应变蝴蝶环，证实了铁电性和压电性。随着Sn4+含量的增加，铁电性能似乎受到抑制，而压电性能在x = 0.075范围内得到提高，然后下降。在所有成分中都观察到中等高的剩余极化(Pr)和低的矫顽力场(Ec)，这可能是存储和开关应用所必需的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS)

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